KR20180088546A - One-body Mixing Axis suppling and mixing the Solidifying Agent in Powdery Form into 1.5 Shot Mode, and The Powdery Mixing Method of Soil Stabilization Using its Mixing Axis installed in front Mast of the Mixing Treatment Equipment - Google Patents

Abstract

The present invention relates to a stirring shaft mounted in mixing and processing equipment to improve soft ground using powder type solidifying agent to supply and stir the powder type solidifying agent for improvement of soft ground in a 1.5 shot mode, and a ground improvement method using the stirring shaft. The stirring shaft includes a swivel for a triple tube, a triple tube rod, a particulate material dispersing and mixing rod, a stirring wing shaft, a stirring wind expansion shaft, and an excavation auger, which are integrated with one another. The present invention can secure economic feasibility and improve the degree of ground improvement since slime is not generated. Moreover, the present invention can enhance stirring efficiency, increase bearing force of a stirring post, and manage the construction site clean since not using water.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for mixing and grinding a solidifying agent, Mode, and The Powdery Mixing Method of Soil Stabilization Using its Mixing Axis installed in front Mast of the Mixing Treatment Equipment}

The present invention relates to a method for improving the mechanical strength of a soil, and more particularly, to a method for improving the mechanical properties of a soil- In the mixed treatment equipment for improving the soft ground, it is necessary to excavate the ground, mix and inject the powder solidifying agent, and mix the mixture with the ground pile soil by rotating agitation, The present invention relates to an agitation shaft which is provided on the front surface thereof and supplies and agitates a powder solidifying agent for soft ground improvement by a 1.5 SHOT system and a mixing treatment method using the agitation shaft.

As the three sides of the country are surrounded by the sea, about 4,600 square kilometers of soft ground is widely distributed. These are concentrated in the west and south coasts, and there is a large-scale market for improving soft ground.

Recently, along with the economic development, there are a lot of sites for the development of scarce infrastructure such as various industrial complexes, ports, roads, and airports. Many construction and civil engineering works are being done to build roads, airports, harbors and other facilities by reclaiming coastal areas to secure these scarce papers. However, since soft river bed and marine sediments composed of clayey soil are distributed in the coastal area, it is necessary to improve the soft ground for building construction.

Techniques for improving soft ground are classified into substitution method, consolidation drainage method, compaction method, cementation method, and reinforcement method. These methods can be further classified according to the improvement method, so that they are composed of dozens of methods as a whole .

Among these conventional methods, the cementation method is subdivided into a mixed treatment method, a chemical solution injection method, a freezing method, a sintering method, and an electric cementation method. In the mixed treatment method, the powder is softened according to the material feeding type of the solidifying agent It is categorized into a mixed system of mixing system which is injected into the ground and solidified and a mixed system of slurry system which injects cement paste.

Recently, the method that is being used to improve the soft ground is mainly the cementation method, and mixed treatment method and chemical solution injection method are widely applied. Since the chemical solution injection method is disadvantageous in terms of environmental and economical due to high construction cost and separate treatment cost due to slime occurrence, it is preferred to improve the ground by mixing treatment method which has good economical efficiency and good workability and little or no slime It is true.

In the mixed treatment method, a lot of ground improvement is applied by the slurry system mixing method among the slurry system mixing treatment system and the slurry system mixing treatment system. However, in the slurry-based mixing process, a mechanical stirring method in which a slurry-based solidifying agent in which cement, water and other additives are blended at a predetermined ratio is injected into the ground and then agitated and cemented is generally applied. This slurry-type mixed treatment method generates a large amount of slime by addition of a solidifying agent mixed with water to a soft base sheet in a high defensive state, and the improvement of the ground strength is poor due to the low efficiency of the ground improvement, .

On the other hand, in the case of mixing system with mixed system, the solidifying agent is mixed with the water in the ground by injecting the solidifying agent into the ground, which is in a high defensive state, so that the improvement of the ground strength is good, the slime hardly occurs, It is a public law.

Therefore, recently, the application performance of the finely divided mixed treatment method, which is excellent after the improvement of the soft ground, is gradually increasing. However, the conventional division system mixing processing method has the following problems.

First, the conventional powder mixed system is a method of spraying the solidifying agent mixed with the ground in the ground through the stirring shaft together with the compressed air and stirring the mixture by the 1.0 SHOT method. In this method, there is a structural problem of the stirring shaft in which the cement is solidified in the pipe of the stirring shaft due to the work characteristics in the soft ground where the water content is high, so there is a problem that the pipe cleaning or the stirring shaft must be replaced.

In addition, since the diameter of the existing mixed-treated pile can be constructed only by one diameter, there is a problem that the diameter can not be adjusted when the ground condition changes abruptly or the reinforcement purpose is changed.

In the conventional powder solidifying agent discharge method, only one discharge port is formed at the tip end of the powder conveying path of the excavating auger and the stirring blade, so that the stirring efficiency is low in the mixing treatment and the stirring efficiency is drastically lowered There was a structural problem. Here, the stirring efficiency changes rapidly depending on the structural shape of the stirring blade and the stirring method.

Document 1). Registered utility model registration No. 0331562, published in the Utility Model Registration Utility Registration of the Korean Intellectual Property Office (Publication date: 2003.11.01) Excavation bit for YSM construction for the improvement of soft ground and vertical wall

Document 2). Registered utility model registration 0362087 disclosed in Utility Model Registration Utility Registration of Korea Intellectual Property Office (Publication date: 2004. 09. 21)

Literature 3). Open No. 1991, published in the Korean Intellectual Property Office Patent Gazette. 0003747 (Publication date: 1991. 06. 10) Soft ground improvement device

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an apparatus and a method for mixing powder, The present invention has been made in order to solve the various problems in the case of feeding the powder solidifying agent as described above by improving the apparatus to be able to be mixed and sprayed and agitated by the 1.5 shot method.

According to the present invention, there is provided an improvement in each of the apparatus for constructing an agitator shaft, comprising three fixed injection pipes connected to a mixing plant in a separate plant, and a swivel for supplying powder solidifying agent to the rotating triple- This system is designed to supply powder solidifying agent smoothly by improving the device configuration for triple pipes. In the case of 1.0 Shot method, which is a conventional material supply method in which a powder solidifying agent is mixed in a separate ground plant, , The cement, the quick-setting agent and the admixture of the powder are respectively transported into the triple pipe rod, and then the mixture of the materials is mixed and sprayed at a certain position in the inside of the triple pipe rod just before the jetting. The purpose of this study is to solve the problem of solidification in the inside of the rod by the high water content.

Further, the present invention is applied to an automatic dispensing apparatus which divides and feeds powder solidifying agent such that powder is sprayed through two discharge port portions of a drilling auger and a plurality of discharge ports formed in a stirring blade, To improve the mixing efficiency of the in-situ soil and the powder solidifying agent by improving the shape of the stirring blades. In the present invention, a check valve nozzle is applied to a discharge port in order to solve the problem that water or moisture in the ground flows back into the triple pipe through the discharge port after the powder solidifying agent is injected into the ground and the solidifying agent is solidified. The diameter of the existing mixed treatment pile can be constructed only with one diameter, and the diameter can not be adjusted when the ground condition changes rapidly or the reinforcement purpose is changed. In order to solve the problem, it is an object of the present invention to develop and apply a stirring blade expander to adjust the size of the agitating blade according to the condition of the ground and the required bearing capacity.

According to the present invention, the above object can be accomplished by providing a powder solidifying agent for a soft ground improvement, which is installed in a mixing treatment equipment and is supplied in a 1.5 SHOT system to agitate the powder, A triple pipe swivel installed at an upper end of the stirring shaft so as to feed and receive powdered cement as a solidifying agent, compressed air, and an admixture; Compressed air, and an admixture, which are connected to the lower portion of the triple pipe swivel and are supplied through the sweeper for the triple pipe, through the inner pipe, the outer pipe and the outer pipe, A triple tube rod which is downwardly conveyed through a center tube and an outer tube; A first circular tube and a second circular tube having no screw at the inside of the lower end region and a third circular tube having an outer side of the upper end region and a screw at the inner side of the lower end region, A lower end portion of the first circular tube is elongated into the powder mixing tube, a plurality of spray holes are formed in the outer peripheral wall of the lower end region, and a corrugated spiral powder dispersion induction plate is provided at the bottom end of the lower end portion, A powder mixing cigarette, which is connected to the lower end of the third cylindrical pipe, and powder-type cement which is pressure-fed into the pipe, and a powder dispersing mixing rod of 1.5 Shot type which mixes the admixture and the compressed air to form a vortex when they meet with compressed air; At least a plurality of stirring vanes are attached in a multi-stage manner in the outer circumferential direction so that the powder solidifying agent connected to the lower portion of the powder dispersing and mixing rod and the injected powder solidifying agent and the in- An agitating blade shaft; An agitating blade expanding shaft connected to the agitating blade shaft and having a plurality of agitating expanding blades vertically rotating, the agitating blade expanding shaft being connected to a lower end of the agitating blade shaft and moving up and down by normal and reverse rotation of the agitating blade shaft; And an excavation auger connected to a lower end of the stirring blade expanding shaft and excavating a hard ground layer. The triple pipe swivel, the triple tube rod, the powder dispersion mixing rod, the powder mixing tube, the stirring blade shaft, Are integrally assembled together by screws and fixing pins, and the integrated stirring shafts are installed on the front surface of the mast of the mixing processing equipment, and are excavated, mixed and stirred by the driving motor provided on the stirring shaft to rotate the soft ground The method according to any one of claims 1 to 6, wherein the solidifying agent is a solidifying agent.

The triple swivel swivel includes a non-rotating head part having an injection path formed therein to receive powdered cement and compressed air supplied from a separate plant, and a first injection pipe installed at one side of the injection path; And an upper end is coupled in a T-shape inside the non-rotating head portion, and the outer peripheral portion is supported by an O-ring and a plurality of O-rings provided in the outer circumferential portion, and powdered cement supplied from the first injection tube A T-shaped first rotary pipe for feeding the mixed air downward and rotated by a driving motor provided on the stirring shaft; A first rotary pipe having a diameter larger than the diameter of the T-shaped first rotary pipe and having a screw formed in a lower end inner area thereof and inserted into the first rotary pipe, at least one through hole being formed in an outer surface of the upper area, A second rotary pipe rotated by a drive motor provided on the shaft; A second stationary pipe provided with a non-rotating second injection pipe for supplying compressed air to one side of an outer surface of the upper portion of the second rotary pipe, a first fixing pipe supported on the inner side by a plurality of O rings and bearings to supply compressed air to the through holes; Wherein at least one through hole and a lower end thread portion are formed on an outer surface of the upper region so as to have a diameter larger than a diameter of the second rotary pipe and formed with a screw in a lower end inner region, A third rotary pipe formed with a hole and rotated by a driving motor installed on a stirring shaft of the mixing processing equipment; A third non-rotating third injection tube for supplying a mixed material and compressed air is provided at one side of the non-rotating third injection tube. The second fixed tube is supported by a plurality of O-rings and bearings, and; And a centralizer provided in a rectangular plate shape between the first rotary pipe and the second rotary pipe and between the second rotary pipe and the third rotary pipe so as to minimize disturbance of the conveying flow of the powder.

The triple tube rod includes: an inner tube having a screw formed at an outer side of the upper end region and an inner side of the lower end region, the upper end region of which is connected to the lower end of the first rotary tube; A center tube having a screw formed on the outer side of the upper region and a screw formed on the inner side of the lower region so that the upper region is connected to the lower end of the second rotary tube; An outer tube having an upper end region and a lower end region formed with a screw and having an upper end connected to a lower end of the third rotary pipe; And a central riser provided in a rectangular plate-like shape in the longitudinal direction between the inner tube and the middle tube and minimizing disturbance of the flow of the powder and fixing the inner tube, the central tube and the outer tube to each other.

Meanwhile, a central riser is further provided between the first and second cylindrical pipes forming the powder dispersion mixing rod, between the second and third cylindrical pipes, and the first circular pipe is disposed at the inner side of the powder mixing pipe A plurality of spray holes are formed in the outer circumferential wall of the first circular tube bottom end region, a powder dispersant induction plate is attached to the bottom, and a protruding portion protruding from the center is formed And at least a plurality of embossed projecting spirals are formed in the projecting portion in the direction of the yarn. The powder mixing tube is formed with at least a plurality of engraved spirals so that the powder solidifying agent, which has been pressure-fed, is mixed with each other by dispersion and vortex formation, It is preferable that a hole for a fixing pin is formed on the thread portion of the upper and lower end regions of the mixing tube so that the fixing pin for preventing loosening is fastened The.

The stirring blade has a through hole in the inner central axis direction and a screw hole in the upper and lower end thread regions of the first stirring shaft and the second stirring shaft and has a slanting shape having a constant inclination in the axial rotation direction on the outer wall along the circumferential direction Wherein the first stirring shaft and the second stirring shaft are connected to each other; A powder conveying path for injecting powder solidifying agent is formed in a stirring blade provided on a circumferential outer wall of the second stirring shaft and a rudder part connected from the through hole of the second stirring shaft to the powder conveying path smoothly A plurality of check valve nozzles are provided at a lower portion of the powder conveying path in the vertical direction and at an end portion of the powder conveying path in the vertical direction and the upper surface is opened and the outer peripheral direction is inclined, And an automatic distribution port for automatically distributing the powder-type solidifying agent supplied from the powder feeder to the powder feed path while automatically distributing the powder to the powder feed path and the excavation auger.

According to the present invention, there is provided a through hole in the inner center and a hole for the fixing pin in the upper and lower region threaded portions, and a forward threaded portion is formed around the third stopper and the fourth stopper in the outer circumferential direction of the upper region A first stopper and a second stopper fastened to an upper side of the forward threaded portion and a lower threaded portion of the reverse threaded portion; The first end of the first hinge ring and the other end of the stirring extension wing are connected to each other by fins so that the upward movement of the first hinge ring is prevented by the first stopper and the downward movement of the first hinge ring is prevented by the third stopper, A connected plunger; A second hinge ring fastened to the first hinge ring so that the upward movement is prevented by the fourth stopper and the downward movement is prevented by the second stopper and is moved up and down by the reverse threaded portion by the normal rotation of the stirring shaft, And the other end is connected to the other end of the plunger by a pin to expand a stirring blade; A first bell tube and an upper end fixed to the first hinge ring and a lower end fixed to the third stopper to secure the forward threaded portion from the gravel and the upper end fixed to the fourth stopper and the lower end fixed to the second hinge ring, And a second corrugated tube for protecting the reverse threaded portion from the gravel.

The excavation auger has a hole for a fixing pin in a through hole and a screw hole in an upper area, and a Y-shaped powder discharge branch path is formed along the auger 77 at the end of the through hole. It is effective that a check valve nozzle is provided at the tip end of the powder discharging branch, respectively, formed at the center of the back surface of the auger blade 77 without friction.

As described above, according to the present invention, slime does not occur unlike slurry-based solidifying agent mixing method, economical efficiency can be secured, and a ground improvement effect can be obtained even in a water layer having a high water content ratio. And the check valve nozzle at the tip of the discharge port, it is possible to solve the problem that the stirring efficiency is increased by dispersing the solidifying agent and that the powder solidifying agent is solidified in the rod, and the mixing treatment with the soil is the best mixed treatment So that the ground improvement strength can be improved.

The present invention can prevent the inflow of water or moisture into the rod by applying a check valve nozzle and adjust the stirring blade shape, rotation speed and drawing speed optimum for the powder mixing treatment, thereby improving the stirring efficiency and shortening the construction speed The development of the pile diameter enlarging device in the formation of the agitating pile can secure diversity of the pile for the purpose such as the arching effect effect or the support force pile, , It is possible to freely select the mixing amount of the powder solidifying agent according to the required strength according to the soil condition and thus it is effective in improving the organic soil which is vulnerable to the manifestation of the soil strength. In comparison with the slurry system mixing method, And there is an effect that clean field management can be performed because water is not used.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front view showing a stirring shaft,
FIG. 2 is a front sectional view showing the inner structure of a triple pipe swivel, a triple pipe rod, and a powder dispersion mixing rod according to the present invention,
3 is a plan view of the powder dispersion induction plate according to the present invention,
4 is a plan view of a powder mixing tube according to the present invention,
FIG. 5 is a front sectional view showing an internal structure of a stirring blade shaft, a stirring blade expanding shaft, and an excavation auger according to the present invention,
Fig. 6 is a flowchart showing the entire operation sequence of the mixing process using the stirring shaft of the present invention.
Fig. 7 is a flowchart of the ground improvement work by the stirring powder material flow and the stirring shaft of the present invention. Fig.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a front view showing an agitating shaft in which respective devices according to the present invention are combined in a mixing and processing equipment, FIG. 2 is a perspective view showing the internal structure of the separator according to the present invention by separating the triple pipe swivel, 4 is a plan sectional view of a powder mixing tube according to the present invention, and FIG. 5 is a cross-sectional view showing a stirring blade shaft and a stirring blade expanding shaft according to the present invention, FIG. And an excavation auger. As shown in Fig.

As shown in these drawings, the stirring shaft 10 according to the present invention is a powder cement which is powder solidifying agent supplied to the stirring shaft 10 of the mixing processing equipment 1 in a separate plant 100, A triple pipe rod 30 connected to the lower end of the triple pipe swivel 20, a triple pipe rod 30 connected to the lower end of the triple pipe sweeper 20, A plurality of powder dispersing mixing rods 40 connected to the lower ends of the powder dispersing mixing rods 30 connected to the lower ends of the powder dispersing mixing rods 30, And a stirring vane shaft 50 to which more than two stirring vanes 51 are attached in multiple stages. Here, a hole (h) for a fixing pin is formed at each of the positions of the triple pipe swivel, the triple pipe rod, the powder dispersion mixing rod, the stirring blade shaft, and the stirring blade expanding shaft and the excavation auger As the pin is inserted, loosening of the screw thread is prevented during reverse rotation.

The present invention further includes a plurality of stirring expansion vanes 68 connected to the stirring vane shaft 50 and rotating vertically and connected to a lower end of the stirring vane shaft 50 to rotate the stirring vane shaft 50 in the forward / And an excavation auger 70 connected to a lower end of the agitated diameter expanding shaft 60 for excavating a hard ground layer.

The triple tube swivel 20, the triple tube rod 30, the powder dispersion mixing rod 40, the powder mixing tube 47, the stirring blade shaft 50, the stirring blade extension shaft 60 and the excavation auger 70, The integrated stirring shaft 10 is tightened to the front surface of the mast of the mixing and processing equipment and then pushed to a predetermined depth by rotational driving by the driving motor 2 provided on the stirring shaft 10, When the shaft is rotated and pulled out, the powder solidifying agent, which is passed through the inner pipe of the stirring shaft and conveyed downward, is supplied to the inhale soil and agitated and solidified, thereby completing the powder mixing treatment of the soft ground.

The swivel 20 for a triple loop according to the present invention has an injection path 21 formed therein and a non-rotating head portion 23 provided with a first injection tube 22 at one side of the injection path 21 . The T-shaped first rotary pipe (25) according to the present invention has a thread formed inside the lower end region, coupled in a T-shape inside the non-rotating head portion (23) 24 and the bearing 24a and feeds the powdered cement and mixed air supplied from the first injection pipe 22 downward and is rotated by the driving motor 2 provided on the stirring shaft 10. [

The second rotary pipe 25a constituting the triple pipe swivel 20 according to the present invention has a diameter larger than the diameter of the T-shaped first rotary pipe 25 and a screw is formed in the lower end inner area, At least one through hole 26 is formed on the outer surface of the upper region and is rotated by the driving motor 2 provided on the stirring shaft 10 of the mixing and processing equipment 1.

The first fixing pipe 29 according to the present invention is provided with a non-rotating second injection pipe 22a for supplying compressed air from one side of the outer surface of the upper region of the second rotary pipe 25a, and a plurality of O- And the bearing 24a to supply the compressed air to the through hole 26. [

The third rotary pipe 25b constituting the triple pipe swivel 20 according to the present invention has a diameter larger than the diameter of the second rotary pipe 25a and has a hole for the pin and a hole for the fixing pin in the lower end inner area And at least one through hole 26a is formed on the outer surface of the upper region and is inserted into the second rotary pipe 25a by the driving motor 2 provided on the stirring shaft 10 of the mixing processing equipment 1 Rotate.

The second fixing pipe 29a constituting the triple pipe swivel 20 according to the present invention is provided with a third non-rotating injection pipe 22b for supplying a mixed material and compressed air from one side, Is supported by a plurality of O-rings (24) and a bearing (24a), and supplies the mixed material and compressed air to the through holes (26a).

The central riser 27 provided in a rectangular plate shape in the longitudinal direction between the first rotary pipe 25 and the second rotary pipe 25a and between the second rotary pipe 25a and the third rotary pipe 25b, Thereby minimizing disturbance of the feed flow and fixing the first rotary pipe 25, the second rotary pipe 25a and the third rotary pipe 25b to each other. As a result, the triple pipe swivel 20 feeds the powdered cement and compressed air supplied from the separately installed plant 100 and feeds the compressed air to the triple pipe rod 30 connected to the lower part.

In the triple tube rod 30 connected to the lower end of the triple pipe swivel 20 according to the present invention, a screw is formed on the outer side of the upper region and the inner side of the lower region so that the upper region is connected to the lower end of the first rotary pipe 25 A central pipe (32) formed with a screw on the outer side of the upper end region and formed with a screw in the lower end region and having an upper end connected to the lower end of the second rotary pipe (25a) And an outer tube 33 connected to the lower end of the third rotary pipe 25b with an upper end portion formed with a screw hole on the outer side and the lower end portion of the upper end region.

The central riser 34 installed in a rectangular plate shape in the longitudinal direction between the inner pipe 31 and the central pipe 32 and between the central pipe 32 and the outer pipe 33 minimizes disturbance of the conveying flow of the powder, 31 and the central tube 32 and the outer tube 33 are fixed to each other so that the triple tube rod 30 functions as a powder dispersing mixing rod 40 connected to the lower end of the triple tube rod 30, It serves to transport solidifying agent.

The powder dispersion mixing rod 40 according to the present invention is installed in a rectangular plate shape between the first circular tube 41 and the second circular tube 42 and between the second circular tube 42 and the third circular tube 43 The central riser 48 serves to minimize disturbance of the conveying flow of the powder and to fix the first cylindrical pipe 41, the second cylindrical pipe 42 and the third cylindrical pipe 43 to each other.

 The first circular tube 41 according to the present invention is installed longer than the other circular tubes so as to be positioned at the inner side of the powder mixing tube 47, The powder dispersion guide plate 45 is attached to the bottom and the projection 45a is formed at the center of the powder dispersion guide plate 45. The projection 45a is formed with four projections 45a, At least a plurality of embossed projecting spirals 45b are formed in the powder mixing tube 47. At least a plurality of engraved spirals 46 are formed inside the powder mixing tube 47 to allow the powder solidifying agent to be mixed with each other by dispersion and vortex formation And a hole (h) for a fixing pin is formed on the upper and lower region threaded portions of the third round tube pipe mixture tube to prevent loosening in the reverse rotation by fixing pin.

The stirring vane shaft 50 according to the present invention is characterized in that a hole h for a fixing pin is formed in an upper end thread portion and a lower end region and through holes 52 and 52b are formed in an inner central axial direction, And a second agitating shaft 50b and a second agitating shaft 50b, each of which is provided with a swirling vane 51 having a certain bit 57 at a side end portion thereof in the axial direction of rotation. The bit 57 serves to smoothly mix the backing soil and the body solidifying agent to be injected.

A powder conveying path 53 for spraying powder solidifying agent is formed in the stirring blade 51 provided on the outer wall of the second stirring shaft 50b and the through hole 52a of the second stirring shaft 50b ) To the powder conveying path 53 is formed in a serpentine curved shape so that the powder conveying flow can be smoothly carried by the powder conveying path 53. The lower part of the powder conveying path 53, A plurality of check valve nozzles 56 are provided on the side of the end of the powder feed path 53 to prevent water contained in the ground from flowing backward through the discharge port 76. That is, the reason why the check valve nozzle 56 is provided is that the powder solidifying agent is injected into the ground and then flows back to the inside of the pipe such as water or the stirring shaft 50 through the discharge port 76 to solidify the solidifying agent To prevent problems in advance.

The automatic partitioning port 55 according to the present invention has an opening 54 on its upper surface and an inclined circumferential surface so as to guide the powder solidifying agent supplied from the inside of the through hole 52a to the powder conveying path 53 At the same time, the first and second agitating shafts 53 and 70 are automatically distributed to the powder conveying path 53 and the drilling auger 70. Holes for fixing pins are formed at the upper and lower end threaded portions of the first agitating shaft and the second agitating shaft, The pins are fastened to prevent loosening of each other when rotating in the reverse direction.

A through hole 61 is formed at an inner center of the stirring blade expanding shaft 60 according to the present invention and a hole h for a fixing pin is formed at the upper and lower region threaded portions. A forward screw portion 62a is formed in the outer circumferential direction of the upper end region about the fourth stopper 65 and a reverse screw portion 62b is formed in the outer circumferential direction of the lower end region, And a first stopper 63 and a second stopper 64 fastened to the lower side of the reverse screw portion 62b.

The upward movement of the first hinge ring is prevented by the first stopper 63 according to the present invention and the downward movement of the second hinge ring is prevented by the third stopper 64a and the forward rotation of the stirring shaft 10 is prevented The first hinge ring 66 and the second hinge ring 66 are connected to each other by a pin 67 connected to the other end of the stirring extension wing 68. The upper and lower region threaded portions are loosened Thereby forming a hole (h) for the fixing pin for fastening the anti-fouling pin. Therefore, the stirring wedge expansion shaft 60 is normally rotated and agitated, and when the wedge diameter expansion shaft 60 is rotated, the stirring wedge expansion shaft 60 is rotated in the opposite direction to expand the stirring widening vane 68, It plays a role of smoothly mixing the original soil and the powdery solidifying agent. In this case, the agitating expanding blade 60 having a certain bit 57a in the axial rotation direction serves to smoothly mix the body solidifying agent in which the bit 57a is injected with the original soil.

The stirring expansion wing 68 according to the present invention is prevented from being upwardly moved by the fourth stopper 65 and being prevented from being downwardly moved by the second stopper 64 and is rotated by the reverse rotation of the stirring shaft 10, And one end of the second hinge ring 66a is connected to the second hinge ring 66a by a pin and the other end of the hinge ring 66a is connected to the other end of the pusher 67 by a pin to expand the stirring blade.

In the present invention, the upper end is fixed to the first hinge ring 66, the lower end is fixed to the third stopper 64a and the fixed first bell pipe 69, the upper end is fixed to the fourth stopper 65, A second bell pipe 69a fixed to the two hinge rings 66a is provided to protect the forward screw portion 62a and the reverse screw portion 62b from the adherence.

The excavation auger 70 according to the present invention has a through hole 71 formed therein and a hole for a fixing pin formed at the upper region threaded portion and a Y- The branch passages 72 and 73 are formed up to the center of both rear faces of the auger 77 without friction with the gravel when rotating to serve as a discharge for supplying the powder solidifying agent to the ground. A check valve nozzle 74 is provided at the leading end of the rear end of the auger vanes 77 to prevent moisture contained in the ground from flowing back into the upper tube through the discharge port 76.

6, The present invention relates to an operation flow diagram using a stirring shaft of the present invention, in which a powdery feed material is fed to a stirring shaft (10) of a mixing processing equipment in a plant (100) And FIG. 7 is a flowchart showing an overall operation flowchart showing how construction is performed according to the operation sequence of the stirring shaft in the field FIG. 1 is a flow chart of a ground improvement process according to an embodiment of the present invention; FIG. 2 is a flowchart illustrating a ground improvement process according to an embodiment of the present invention; FIG.

Example

1) In a separately provided plant 100, a powder solidifying agent is injected through a first injection tube, a second injection tube, and a third injection tube of a triple-tube swivel 20 constituting an agitating shaft 10 of the mixing processing apparatus 1, (P10), which is supplied with powdered cement, compressed air, and an admixture as a pressurized feed.

2, and the powdered cement, compressed air, and admixture conveyed through the triple-purpose swivel 20 are conveyed downward through the inner tube 31, the middle tube 32, and the outer tube 33 of the triple tube rod 30 (P20).

3) The powdered cement, compressed air, and admixture transferred to the first cylindrical pipe 41, the second cylindrical pipe 42 and the third circular pipe 43 constituting the powder dispersed mixing rod 40, The powdered cement and the admixture are mixed with the compressed air in the powder mixing tube 47 having the powder dispersion guide plate 45 and the automatic partitioning port 46 provided in the lower end region of the clearance pipe 41 to form vortices, 1.5 Shot type powder mixing step (P30).

4) The mixed powder solidifying agent is supplied to the stirring vanes 51 of the second vane axis 50b provided at the lower end of the stirring vane shaft 50 by the compressed air and the check valve nozzles 56 and 74 of the excavation auger 70, (P40), which is supplied to the ground via the spraying step (P40).

5), the powdery solidifying agent supplied to the ground is subjected to a stirring step (P50) of mixing with the in-situ soil soil by forced rotation of the stirring blade (51) of the stirring blade shaft (50) (P50) in which the stirring extension blade (68) constituting the stirring blade (60) is mixed with the home soil by expanding the stirring cup by vertical movement by the forward and reverse rotation.

6) The series of processes described above is performed in such a manner that the stirring shaft 10 installed on the front surface of the mast of the mixing treatment equipment and driven to rotate by the driving motor 2 is inserted into the ground up to a predetermined depth, The injection agent is fed into the stirring shaft 10 and mixed with each other in a 1.5 Shot manner while passing through the powder dispersion induction plate 45 and the powder mixing tube 47 provided at the lower end of the powder dispersion mixing rod 40, And the ground pile is solidified and mixed with the ground pile by the rotation of the agitating blades attached to the lower end of the agitation shaft, the agitating extension wing and the excavation auger, and the ground improvement is completed by the mixing treatment through the cementing step (P60).

At this time, the expansion of the agitating expansion vane 68 in the agitating diameter expanding shaft 60 is performed when the first hinge ring and the second hinge ring fastened to the forward screw portion 62a and the reverse screw portion 62b rotate in the reverse direction The stirring extension wing 68 is extended while moving to the center of the threaded portion of the stirring wedge expansion shaft 60 along the threaded portion. When the stirring wedge is reduced, the stirring shaft is rotated forward again to rotate the first hinge ring 66 and the second hinge ring 66, The pushing rod 66a is moved along the threaded line in the direction of the first stopper 63 and the second stopper 64 so that the pushing rod is expanded to reduce the agitation enlargement diameter. Mixing, injection, agitation and cementation of the powder solidifying agent at the time of drawing.

Hereinafter, the mixing treatment method according to the present invention will be described in detail.

The triple pipe swivel 20, the triple pipe rod 30, the powder dispersion mixing rod 40, the powder mixing pipe 47, the stirring blade shaft 50, the stirring blade expansion shaft 60, (S10) is rotated in the forward direction to insert into the soft ground (S10)

The agitating shaft 10 inserted into the soft ground pressurizes and mixes the powder solidifying agent through the inside of the agitating shaft 10 and feeds the powder solidifying agent to the powder feed path 53 of the agitating vane 51 and to the branch of the excavation auger 70 The powder solidifying agent is injected in-situ in the ground of the soft ground through the check valve nozzle 56 provided at the discharge port 76 of the discharge ports 72 and 73. At S20,

 At the same time as the powder solidifying agent is injected into the ground, the stirring shaft 10 is drawn while being stirred (S30), and the stirring blade expanding shaft 60 is rotated in the opposite direction as necessary to expand the stirring expanding blade 68 The enlarged diameter of the distillation ground is expanded and stirred (S40). When the stirring blade is reduced, the stirring blade expanding shaft 68 is expanded and the stirring agitating is performed when the stirring blade expanding shaft 60 is rotated forward again The diameter of the agitated pile is also reduced (S50), and the soft ground is improved through the cementation process.

The present invention has been made in view of the above problems of the prior art, which is a problem of the conventional powder mixing system, that is, the problem of solidification of the powder solidifying agent in the stirring shaft tube, the water backflow problem into the stirring shaft tube, the stirring blade diameter expansion problem, Problems can be solved by applying 1.5 Shot blending method and device development technology to improve the ground improvement efficiency and to secure economical efficiency.

Particularly, the powder-type mixing treatment method applied to the present invention is a method in which a powder solidifying agent in which cement and various admixtures are mixed is supplied to a soft layer and uniformly mixed by forced rotation to form a chemical soil As an improvement method, not only the increase of the strength of the ground such as the prevention of liquefaction of the soft layer and the prevention of the lateral flow, but also the reduction of the foundation of the structure and the settlement of the clayey soil are prevented.

As described above, according to the present invention, slime does not occur unlike slurry-based solidifying agent mixing treatment, economical efficiency can be secured, high ground improvement strength can be formed even in a high water content layer, and the amount of solidifying agent can be reduced. And it is possible to solve the problem of solidification of the soil, and it is possible to perform the best mixing treatment between the solidifying agent and the gypsum reflecting the dispersion input and the plurality of discharge ports by the stirring wing and the excavation auger, thereby improving the ground improvement strength.

The present invention can prevent the inflow of water into the rod by applying a check valve nozzle and adjust the stirring blade shape, rotation speed and drawing speed optimum for the mixing process, thereby improving stirring efficiency and improving the ground suitable for the purpose It is possible to increase the bearing capacity of the pile by developing the pile diameter enlarging device and to improve the construction speed by developing the continuous automatic feeding device of the powder solidifying agent and to freely select the mixing amount of the powder solidifying fire according to the soil condition and the required strength It is effective to improve the organic soil which is vulnerable to the development of the soil strength. It is less influenced by the rise of the ground and surrounding ground than the slurry system mixing method. Because it does not use water, clean field management is possible.

As used herein, the terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor shall properly define the concept of the term to describe its invention in the best possible way It should be construed as meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the constitutions shown in the drawings are only a preferred embodiment of the present invention, and not all of the technical ideas of the present invention are described. Therefore, various equivalents It should be understood that water and variations may be present.

1: Mixing treatment equipment 2: Driving motor
10: stirring shaft 20: triple-purpose swivel
21: injection path 22: first injection tube
22a: second injection tube 22b: third injection tube
23: Non-rotating head part 24: O-ring
24a: bearing 25: first rotary pipe
25a: second rotary pipe 25b: third rotary pipe
26, 26a: through holes 27, 34, 48: central riser
29: first fixing pipe 29a: second fixing pipe
30: triple tube rod 31: inner tube
32: central tube 33: outer tube
40: powder dispersing mixing rod 41: first circulation tube
42: second roundhouse 43: third roundhouse 42:
44: spray hole 45: powder dispersion guide plate
45a: projecting portion 45b: embossed projecting spiral
46: indented spiral 47: powder mixing tube
50: stirring blade shaft 50a: first stirring shaft
50b: second stirring shaft 51: stirring blade
52, 52a, 61: Through hole 53: Powder conveying path
54: aperture 55: automatic splitter
56: Check valve nozzle 57, 57a: Bit
60: Stirring blade diameter expansion shaft 62a: Forward screw portion
62b: reverse threaded portion 63: first stopper
64: second stopper 64a: third stopper
65: fourth stopper 66: first hinge ring
66a: second hinge ring 67:
68: agitating extension blade 69: first corrugated tube
69a: 2nd corrugated pipe 70: drilled auger
71: through hole 72, 73:
74, 75: Check valve nozzle 76:
77: auger wings
h: Hole for fixing pin

Claims (8)

In a stirring shaft which is installed in a mixing treatment equipment and is supplied with a powder type solidifying agent for soft ground improvement in a 1.5 SHOT system and is stirred,
The mixed processing apparatus 1 is provided with a mixing unit 3 for mixing powdered cement, compressed air, and an admixture, which are powder solidifying agents, which are supplied to the mixing shaft 10 of the mixing processing equipment 1, A generic swivel and (20);
A middle pipe 32 and an outer pipe 33 each having an inner pipe 31, a middle pipe 32 and an outer pipe 33 each having a screw on the outer side of the upper end region and the lower end side of the upper end region thereof and connected to the lower portion of the triple pipe swivel 20, A triple tube rod 30 for feeding powdered cement, compressed air, and admixture supplied through the inner tube 31, the center tube 32, and the outer tube 33 downward;
A first cylindrical pipe 41 and a second cylindrical pipe 42 with no screw at the inside of the lower end region and a third cylindrical pipe 43 with a screw at the inside of the upper end region and the lower end region, And the lower end of the first circular pipe 41 is extended into the powder mixing pipe 47 and the outer peripheral wall of the lower end region is provided with a plurality of spray holes 44 And a recessed helical powder mixing guide tube 45 is provided at the bottom of the lower end of the third cylindrical tube 43. The recessed helical powder distribution guide tube 45 is disposed at the bottom of the lower end of the third cylindrical tube 43, A powder dispersing mixing rod 40 of 1.5 Shot type which forms a vortex when the powdered cement and the admixture are compressed and mixed with each other,
At least a plurality of stirring blades 51 are attached in a multistage manner in the outer circumferential direction so as to be able to mix and stir the powder solidifying agent and in-situ gypsum injected to the lower part of the powder dispersing and mixing rod 40, A stirring blade shaft 50 connected to the stirring shaft 50a by a second stirring shaft 50b;
And a plurality of stirring extension wings 68 connected to the stirring wing shaft 50 and vertically rotating so as to be connected to a lower end portion of the stirring wing shaft 50 to rotate the stirring wing shaft 50 in the up and down A stirring pan extension shaft 60 for moving the stirring pumper;
An excavation auger 70 connected to a lower end of the agitated blade expanding shaft 60 and supplying powdered solidifying agent, which has been conveyed downward, to the original soil gravel and excavating a hard ground layer;
The triple tube swivel 20, the triple tube rod 30, the powder dispersion mixing rod 40, the powder mixing tube 47, the stirring blade shaft 50, the stirring blade extension shaft 60 and the excavation auger 70, Wherein the integrated stirring shaft 10 is assembled into a single integrated shaft and is rotationally driven by a driving motor 2 provided on the stirring shaft 10 after being fastened to the front surface of the mast of the mixing processing equipment. A stirring shaft that is installed and supplied with 1.5 SHOT type powder solidifying agent for soft ground improvement and stirring. The method according to claim 1,
The triple pipe swivel 20 has an injection path 21 formed therein to receive powdered cement and compressed air supplied from a separate plant and a first injection pipe 22 A non-rotating head portion 23 provided with a rotating shaft;
And the upper end portion is coupled in a T-shape within the non-rotating head portion 23, and is supported by an O-ring 24 and a bearing 24a provided on the outer peripheral portion thereof, A T-shaped first rotary pipe (25) which is rotated by a drive motor (2) provided on an agitating shaft (10) and feeds the powdered cement and mixed air supplied from an injection pipe (22) downward;
The first rotary pipe 25 has a diameter larger than the diameter of the T-shaped first rotary pipe 25 and is formed with a screw in the lower end inner region, inserted into the first rotary pipe 25, And a second rotary pipe (25a) which is rotated by a drive motor (2) provided on an agitating shaft (10) of the mixing and processing equipment (1); A second non-rotating second injection pipe 22a for supplying compressed air to one side of the outer surface of the upper portion of the second rotary pipe 25a is installed and is supported by a plurality of O-rings 24 and bearings 24a, A first fixing pipe (29) for supplying compressed air to the first fixing pipe (26);
A screw is formed in a lower end inner region of the second rotary pipe 25a to be inserted into the second rotary pipe 25a and at least one through hole 26a is formed in the outer surface of the upper pipe, And a third rotary pipe 25b formed with a hole h for a fixing pin on the lower area threaded portion and rotated by a driving motor 2 installed on the stirring shaft 10 of the mixing and processing equipment 1; A third non-rotating third injection pipe 22b for supplying a mixture and compressed air to the first non-rotating third injection pipe 22b is supported by a plurality of O-rings 24 and a bearing 24a, A second fixing pipe (29a) for supplying a mixture and compressed air to the through hole (26a);
Is provided in a rectangular plate shape in the longitudinal direction between the first rotary pipe (25) and the second rotary pipe (25a) and between the second rotary pipe (25a) and the third rotary pipe (25b) And a central riser (27) for minimizing the amount of powdered solidifying agent (27). The method according to claim 1,
The triple tube rod 30 has an inner tube 31 formed with threads on the outer side of the upper end region and the inner side of the lower end region and having an upper end connected to the lower end of the first rotary pipe 25;
A central pipe (32) having a screw formed on the outer side of the upper region and a screw formed on the inner side of the lower region, the upper region of which is connected to the lower end of the second rotary pipe (25a);
A hole h for the fixing pin is formed at the center of the upper and lower region threaded portions and a screw is formed inside the upper end region and the lower end region so that the upper end region is connected to the outer pipe connected to the lower end portion of the third rotary pipe 25b 33);
The inner tube 31 and the outer tube 33 are provided in a rectangular plate shape in the longitudinal direction between the inner tube 31 and the middle tube 32 and between the inner tube 31 and the outer tube 33, And a central riser (34) for fixing the outer tube (32) and the outer tube (33) to each other. The stirring shaft is installed in the mixing processing equipment and supplies and agitates the powder type solidifying agent for improving the soft ground by a 1.5 SHOT system. The method according to claim 1,
A hole h for a fixing pin is formed at the center between the first cylindrical pipe 41 and the second cylindrical pipe 42 constituting the powder dispersed mixing rod 40 and the second cylindrical pipe 42 and the upper and lower region threaded portions, A central ring riser 48 is further provided between the third cylindrical pipe 43 formed with the first cylindrical pipe 41 and the second cylindrical pipe 41. The first cylindrical pipe 41 has a hole A plurality of spray holes 44 are formed in the outer peripheral wall of the lower end region of the first cylindrical pipe 41 and a powder dispersive guide plate 45 is disposed on the bottom of the mixing pipe 47, And the powder dispersing guide plate 45 is formed with a protruding portion 45a protruding from the center and at least a plurality of protruding spiral bosses 45b are formed in the protruding portion 45a in the four directions, The powder solidifying agent formed by at least a plurality of intaglio helixes (46) inside the tube (47) Is installed in the mixing process, it characterized in that the property to be mixed with each other by stirring shaft equipment for improving soft ground powder form and stirred for 1.5 SHOT agent supplied to the system. The method according to claim 1,
The stirring vane shaft 50 has through holes 52 and 52b in an inner central axis direction and a hole h for a fixing pin is formed in the first stirring shaft and the second stirring shaft upper and lower region threaded portions. A first stirring shaft 50a and a second stirring shaft 50b provided on the outer wall along the circumferential direction, each of which is provided with a stirring vane 51 having a predetermined inclination in the axial rotation direction;
A powder feed path 53 for injecting powder solidifying agent is formed in the stirring blade 51 provided on the outer wall of the second stirring shaft 50b and is connected to the through hole of the second stirring shaft 50b 52a to the powder conveying path 53 are formed in a serpentine curved shape so as to smooth the powder conveying flow, and the lower right portion of the powder conveying path 53 and the lower end portion of the powder conveying path 53 A plurality of check valve nozzles 56 are installed;
Shaped solidifying agent that is supplied from the inside of the through hole 52a is guided to the powder conveying path 53 while the powder conveying path 53 is slidably engaged with the powder conveying path 53, And an automatic distribution port (55) for automatically distributing the powdered solidifying agent to the auger (70). The method according to claim 1,
A through hole 61 is formed at an inner center of the stirring blade expanding shaft 60 and a hole h for a fixing pin is formed at the upper and lower region threaded portions. A third stopper 64a and a fourth stopper And a reverse threaded portion 62b is formed in the outer circumferential direction of the lower end region of the lower threaded portion 62a and the upper threaded portion 62b of the forward threaded portion 62a, A first stopper 63 and a second stopper 64 fastened to the lower side;
The first stopper 63 and the third stopper 64a move downward to prevent the upward movement and the downward movement of the stirring shaft 10 by the forward and reverse rotations of the forward screw portion 62a, A plunger (67) having one end of the hinge ring (66) and the other end of the stirring extension wing (68) connected by a pin;
The first stopper 65 is moved upward by the second stopper 64 and the downward movement of the second stopper 64 is stopped by the fourth stopper 65 and is moved up and down by the reverse screw portion 62b by normal / A second hinge ring 66a and a stirring extension wing 68 having one end connected to the second hinge ring 66a by a pin and the other end connected to the other end of the hinge 67 by a pin to expand the stirring cup;
A first corrugated pipe 69 whose upper end is fixed to the first hinge ring 66 and whose lower end is fixed to the third stopper 64a to protect the forward threaded portion 62a from the debris, And a second bell pipe (69a) fixed to the second hinge ring (66a) and fixed to the second hinge ring (66a) to protect the reverse screw part (62b) from the gravel. Agitating shaft for supplying and agitating powder solidifying agent in 1.5 SHOT system. The method according to claim 1,
Holes 71 are formed in the excavation auger 70 and holes h for fixing pins are formed in the upper thread portion and a Y-shaped branch is formed at the end of the through- And a check valve nozzle 74 is provided at an inner center of the branch passages 72 and 73 on the curved surface side of the auger 77 without friction with the gravel ) Is provided in the mixing processing equipment, and the powder solidifying agent for soft ground improvement is supplied in a 1.5 SHOT system and stirred. In a mixing treatment method using a stirring shaft which is installed in a mixing treatment equipment and is supplied with a powder type solidifying agent for soft soil improvement in a 1.5 SHOT system and is stirred,
A supply step of supplying powdered cement, powdered cement, compressed air and an admixture, which are powder solidifying agents, through a first injection tube, a second injection tube and a third injection tube of a powder type swivel which constitutes a stirring axis of the mixing processing equipment, ;
A conveying step of conveying the powdered cement, compressed air, and admixture conveyed through the triple pipe swivel downward through the inner pipe, the center pipe and the outer pipe of the triple pipe rod;
Powdered cement, compressed air, and an admixture, which are transferred to the first cylindrical pipe and the second circular pipe and the third circular pipe constituting the powder dispersing mixing rod, are disposed in the lower end region of the first circular pipe, A powder mixing step of mixing powdered cement and admixture with compressed air to form a vortex and mixing them with each other;
Stirring step of stirring the in situ soil with a stirring blade constituting the stirring blade axis and stirring the powdery solidifying agent with the in situ soil soil through the powder expansion blade and stirring agitation of the stirring blade When necessary, An expanding agitation step of expanding the agitating blade by moving up and down the agitating blade;
The triple pipe swivel, the triple tube rod, the powder dispersing mixing rod, the powder mixing tube, the stirring blade shaft, the stirring blade expanding shaft and the excavation auger are assembled into one, and the integrated stirring shaft is fastened to the front surface of the mast Each powder solidifying agent, which is pressure-fed into the stirring shaft tube, is driven to rotate by a driving motor provided on a stirring shaft after passing through a powder dispersion induction plate and a powder mixing tube provided at the lower end of the powder dispersion mixing rod, And then agitated through the second agitating shaft stirring vane and the discharge port of the excavation auger while being automatically injected into the ground and at the same time being agitated by the rotation of the agitating wing at the lower end of the agitating shaft and the agitating wing and the excavation auger, Which is installed in the mixing treatment equipment and supplied with the powder type solidifying agent for soft soil improvement in the 1.5 SHOT system, Li method.

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