JP2004132030A - Soil improving method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a soil improving method capable of preventing the moisture content of improved sediment from being excessively lowered even if cement and quick lime are added to rather dry sediment, providing high quality improved sediment, and manufacturing soil concrete and improving contaminated soil in a soil improving field. <P>SOLUTION: Sediment, an improver, and water or a soil improving solution are led from a hopper 10, a container 11, and a water adding device 40 installed in a self-running soil improving machine 1 into a mixing device 15, respectively, and mixed with each other. The improved sediment mixed with the improver falling from the mixing device 15 is conveyed to the outside of a vehicle body 9 by a conveyor 16. The soil cement is manufactured by using cement as the improver. By using the soil improving solution in place of water, the contaminated soil is improved. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a soil improvement method that can be used not only for improving soft ground to strengthen the ground, but also for producing soil concrete, improving contaminated soil, and the like.
[0002]
[Prior art]
In road construction, foundation construction, or burial construction of gas pipes and water and sewage pipes, the soil is soft, so improve it with cement, lime, etc., and backfill the soil with an appropriate grain size, moisture content, and hardness. You may need to.
[0003]
There are two types of soil improvement machines that perform such soil improvement: stationary (stationary) soil improvement machines and self-propelled machines. The stationary soil improvement machine transports the soil to be improved excavated at the site to the place where the soil improvement machine is installed, mixes the soil with the soil that has been transported to the place where the soil improvement machine is located, mixes the improvement material, The improved earth and sand must be transported to the site again and backfilled.
[0004]
On the other hand, since the self-propelled soil improvement machine can be carried into the site, the labor, time, and cost required for such transportation can be omitted. As such a self-propelled soil improvement machine, there is one described in Patent Document 1, for example. This conventional self-propelled soil improvement machine is equipped with a hopper in front of the car body for charging the earth and sand to be improved, a container for storing the improvement material in the center, and an improvement of the soil and the container below. A mixing device for mixing the materials is installed, and the improved earth and sand dropped from the mixing device is carried out to the rear of the vehicle body by a conveyor to be accumulated.
[0005]
[Patent Document 1]
JP-A-2002-167799.
[0006]
[Problems to be solved by the invention]
In the conventional soil improvement as described above, the soil at the site is transported to a place where the moisture content measuring device is distant from the site, and the moisture content is measured. The soil quality is being improved by controlling the amount of additive added.
[0007]
However, under a condition of easy drying such as high temperature in summer or low humidity in winter, when a considerable time elapses from the time of moisture content measurement to the time of soil improvement work at the site, the soil becomes extremely dry and dry. Cement or quicklime is added to the soil to further improve the soil quality, so that the water content may be excessively low.
[0008]
This is for the following reason. That is, when, for example, quicklime is used as the improving material, the properties of the soil are improved by the following reaction.
(Hydration reaction): Moisture in soil reacts with quicklime to produce slaked lime, and the water content decreases.
(Aggregation reaction): Soil particles aggregate due to exchange of calcium ions and cations on the soil particle surface.
(Posolan reaction): Silica and alumina in the soil react with calcium ions of lime and harden.
(Carbonation reaction): Slaked lime reacts with carbon dioxide and carbon dioxide in the soil to keep solidifying.
[0009]
Of the above reactions, when the soil dries, the hydration reaction further lowers the water content, and the subsequent reaction of the improving material (solidifying material) deteriorates, or the water content deviates significantly from the optimum water content due to insufficient water. Such a particle size cannot be obtained, resulting in problems such as inability to squeeze and harden at the time of compaction. Even when cement is added as an improving material, the progress of the hydration reaction is deteriorated due to excessive drying of the soil, and high-quality improved earth and sand cannot be obtained.
[0010]
The present invention has been made in view of the above problems, and in a site where soil is improved, the moisture content of the improved sediment does not become excessively low even when cement or quick lime is added to the relatively dry soil, resulting in high quality improved sediment. It is an object of the present invention to provide a soil improvement method capable of obtaining the following.
[0011]
It is another object of the present invention to provide a soil improvement method that enables production of soil concrete and improvement of contaminated soil at a site where soil is improved.
[0012]
[Means for Solving the Problems]
(1) In the soil improvement method of the present invention, the soil to be improved is put into a hopper provided at the front of a self-propelled soil improvement machine,
The earth and sand supplied from the hopper, the improving material supplied from a container mounted on the self-propelled soil conditioner, and the water supplied from the water supply device mounted on the self-propelled soil conditioner, Mix by the mixing device installed in the improved machine,
The improved soil mixed with the improved material is transported by a conveyor to the outside of the self-propelled soil improvement machine.
[0013]
In this way, if a self-propelled soil improvement machine is provided with a water adding device and water is added in addition to the improving material, if the soil has a high water absorption or the water content is low, the improvement of cement, quick lime, etc. By adding water in addition to the material, problems such as an excessively low water content of the improved earth and sand can be solved. That is, by adding water, the progress of the hydration reaction is promoted to improve the soil quality satisfactorily, the water content and the particle size can be suitably maintained, and the rolling pressure is also satisfactorily performed.
[0014]
In addition, such control of the water content is suitably performed by measuring the water content on site and controlling the improving material and the amount of water in accordance with the measured value.
[0015]
(2) Further, in the soil improvement method of the present invention, cement is stored in the container as an improving material,
In the mixing device, the soil supplied from the hopper, the cement supplied from the container, and the water supplied from the water adding device are mixed to produce soil cement instead of the improved soil.
[0016]
That is, the mixing amount of cement supplied from the container and the amount of water added from the water adding device to the soil and sand used as the material of the soil concrete correspond to the ratio corresponding to the production of the soil concrete, that is, a relatively large amount of cement or water is added. By being configured so that it can be set, soil concrete can be manufactured as well as simply improving soil properties.
[0017]
(3) Further, in the soil improvement method of the present invention, a soil improvement solution such as a contaminant eliminating or PH adjustment is supplied to the mixing device instead of the water from the water supply device, and the solution is supplied from the hopper. And an improved material supplied from the container to produce an improved earth and sand.
[0018]
That is, for example, by adding an alkaline aqueous solution from a water adding device to improve acidic soil, or by adding a solution that eliminates this to soil contaminated by the outflow of chemicals, it is possible to improve contaminated soil and expand its applications. You.
[0019]
(4) In the soil improvement method of the present invention, preferably, the improved soil is dropped forward of a self-propelled soil improvement machine by the conveyor.
[0020]
In this way, if the improved soil is carried out in front of the self-propelled soil improvement machine, the soil improvement is performed while the discharged improved soil is buried in the excavated area and stepped on by the traveling body of the self-propelled soil improvement machine. It can be carried out. Therefore, there is no need to carry out and backfill the improved soil that has been carried out and accumulated behind the self-propelled soil improvement machine, so that it is not necessary to secure a wide place, and the work can be easily performed even in a narrow place. Further, the soil improvement and backfilling work can be performed efficiently and with one self-propelled soil improvement machine, and the number of working machines can be reduced. In addition, since the soil quality is improved by the mixing apparatus, the mixing of the improving material is uniformly performed, and high-quality improved earth and sand can be obtained. In addition, there is no problem that the improving material scatters and disturbs the neighborhood.
[0021]
(5) In the soil improvement method of the present invention, preferably, while the swiveling conveyor provided at the front of the self-propelled soil improvement machine is swung, the improved soil transported in front of the self-propelled soil improvement machine is removed. , Spread in the width direction of the self-propelled soil improvement machine and fall to the ground.
[0022]
In this way, the improved soil is spread widely in the width direction of the self-propelled soil conditioner by dropping the improved soil onto the ground while turning the swivel conveyor provided in the self-propelled soil conditioner. Can be. For this reason, for example, when the soil improvement is performed simultaneously with the excavation of the road and the backfill is performed, the improved earth and sand improved by the self-propelled soil improvement machine can be evenly backfilled at the excavated place. Further, since the self-propelled soil improvement machine does not need to be used for leveling the backfill soil with the improved soil, the operation rate of the soil improvement work of the self-propelled soil improvement machine is increased, and the efficiency is improved.
[0023]
(6) In the soil improvement method of the present invention, preferably, the improved earth and sand dropped on the ground is leveled by a blade provided at a front portion of the self-propelled soil improvement machine.
[0024]
In this way, if the ground on which the improved soil falls is leveled by the blade, the improved soil can be easily and evenly leveled by the traveling of the self-propelled soil conditioner.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a side view showing an embodiment of a self-propelled soil improvement system for implementing a soil improvement method of the present invention in a working state. This system comprises a self-propelled soil improvement machine 1, a hydraulic excavator 2 as an excavator / loader, and a tank truck 41 described later (FIG. 5). The hydraulic excavator 2 has a revolving unit 5 installed on a crawler-type traveling unit 3 via a revolving device 4, an articulated front 6 attached to the revolving unit 5, and a bucket 7 attached to the tip thereof.
[0026]
On the other hand, as shown in the side view of FIG. 2, the plan view of FIG. 3, and the front view of FIG. 4A, the self-propelled soil improvement machine 1 has a vehicle body 9 mounted on a crawler type traveling body 8 having a crawler 8a. Then, a hopper 10 for charging earth and sand is mounted on a front portion of the vehicle body 9. Further, a container 11 for storing an improving material such as cement or lime is mounted behind the hopper 10 (in the present embodiment, at the center of the vehicle body 9). A hydraulic power unit 12 is mounted at the rear of the vehicle body 9.
[0027]
Below the container 11 in the vehicle body 9, a fixed amount supply device 13 and a water supply device 40 are provided. In addition, below the container 11, the improving material supplied by the fixed amount supply device 13, the earth and sand supplied by the conveyor 14 installed below the hopper 10, and the water or the soil improving solution from the water adding device 40. Is introduced from the inlet port 15d at one end to mix. The fixed-quantity supply device 13 has, for example, four blades attached to a rotating shaft, and accommodates a fixed amount of improving material between the blades located on the upper surface and rotates the same. The improved material is dropped downward, and the rotation speed is controlled in accordance with the degree of softness of the soil to be improved, so that the improved hardness, moisture content, and grain size can be obtained. .
[0028]
As shown in FIG. 4 (B), the mixing device 15 has an even number of rotating shafts 15a and a paddle 15b attached to each rotating shaft 15a. The pair of rotating shafts 15a, 15a Is rotated in a direction sandwiched between the two, thereby mixing the earth and sand with the improving material and discharging the mixture through the discharge port 15c (see FIG. 2).
[0029]
Reference numeral 16 denotes a conveyor for carrying the improved earth and sand discharged from the mixing device 15 to the front of the self-propelled soil improvement machine 1. The conveyor 16 is installed between the left and right crawlers 8a, 8a of the traveling body 1, the rear end of the conveyor 16 is located below the discharge port 15c of the improved earth and sand of the mixing device 15, and the front end of the self-propelled soil improvement machine 1 is located at the front end. Located forward.
[0030]
Reference numeral 17 denotes a passage provided around the container 11 on the vehicle body 9, and is used by an operator to monitor the earth and sand filling state of the hopper 10 and the filling state of the improving material in the container 11 which are not visible to the operator of the excavator 2. It is up.
[0031]
FIG. 5 is a block diagram showing a mixing control system of a system for implementing the soil improvement method of the present invention. In FIG. 5, the water supply device 40 includes a pump 44 driven by an electric motor 43 that is supplied with water from the tank lorry 41 via a hose 42 and supplies the water to the mixing device 15, and a flow rate detector 45 that detects the flow rate of water supply. The electric motor 43 of the present embodiment is a three-phase AC motor to which power of a three-phase AC generator 46 provided in the hydraulic power unit 12 is supplied under the control of an inverter 47.
[0032]
The earth and sand supply conveyor 14 is provided with a speed detector 49 for detecting the amount of earth and sand supplied and a earth and sand height detector 50 for detecting the earth and sand height on the conveyor 14.
[0033]
The detection signals from these detectors 49 and 50 and the flow detector 45 are sent to a controller 51, which controls the drive motor 52 of the conveyor 14, the motor of the fixed-quantity supply device 13, and the inverter 47 from these detection signals. Thus, the feed rate of the soil, the feed rate of the improving material, and the feed rate of the water can be controlled respectively. The controller 51 is provided with a recording device 53 for recording the supply amount of each mixture and the like.
[0034]
When performing the soil improvement method of the present invention, as shown in FIG. 1, the excavator 2 is positioned prior to the self-propelled soil improvement machine 1, and the traveling of the excavator 2 and the operation of the turning device 4 are performed. The self-propelled soil improvement machine 1 performs soil improvement by excavating the soil to be improved by the bucket 7 and loading the soil into the hopper 10 by turning the revolving body 5 and operating the joints of the articulated front 6.
[0035]
In the self-propelled soil improvement machine 1, the earth and sand fed into the hopper 10 are supplied to the mixing device 15 by a fixed amount per predetermined time by the operation of the conveyor 14, and the improvement material stored in the container 11 is quantitatively supplied to the mixing device 15. The water is supplied to the mixing device 15 by the water adding device 40 and mixed when the material and the water content of the soil at the site are low and the water content is low. In this case, detection signals from the speed detector 49, the sediment height detector 50, and the flow rate detector 45 of the conveyor 14 are sent to the controller 51, and the controller 51 obtains the drive motor 52 of the conveyor 14, By controlling the motor of the supply device 13 and the inverter 47 to control the supply amount of the earth and sand, the supply amount of the improving material, and the amount of water, respectively, the water content of the improved earth and sand is set to the target value. The control of the amount of water with respect to the amount of treated soil is performed by the following equation (1).
[0036]
W = (M * 1.6 * K / 100) * 1000 (1)
Here, W is the amount of water added (L / hr), M is the amount of treated soil (m ³ / hr), and K is the rate of water addition (%). 1.6 in the equation (1) is the specific gravity of the soil in a loose state (excavated and loosened).
[0037]
As shown in FIG. 1, the improved soil 18 mixed with the improving material in the mixing device 15 is conveyed to the ground from the front of the self-propelled soil improvement machine 1 by the conveyor 16 and backfilled. The improved soil 19 that has fallen to the ground can be leveled by, for example, running the self-propelled soil improvement machine 1 in a zigzag manner so that the crawler 8a runs on the backfilled soil. Such running for leveling may be performed while mixing by the mixing device 15 or temporarily stopped. In addition, the hydraulic shovel 2 located in front of the self-propelled soil conditioner 1 can perform leveling by the bucket 7 during excavation of the soil.
[0038]
As described above, by providing the self-propelled soil improvement machine 1 with the water adding device 40 and adding not only the improving material but also water, in the case of soil having a high water absorption rate or dry soil having a low moisture content, By adding water to materials other than improving materials such as lime and quicklime, it is possible to prevent the water content of the improved earth and sand from becoming excessively low, promote the hydration reaction, have an appropriate water content and particle size, and squeeze by compaction. Improved quality earth and sand can be obtained. In particular, soil improvement is suitably performed by measuring the water content at the site and controlling the improving material and the amount of water in accordance with the measured values.
[0039]
In addition, cement is used as an improving material to be accommodated in the container 11, the relative mixing amount of the soil and sand from the conveyor 14 is adjusted, and the amount of water added from the water adding device 40 is adjusted to produce soil concrete locally. Functions can be provided. This enables construction as a substitute for lap concrete (concrete that becomes the foundation of a building instead of foundation piles).
[0040]
By manufacturing soil concrete in this way, excavated soil is not disposed of and transported, so that cost reduction can be achieved. In addition, improvement can be achieved by combining the mixing device 15 with the good mixing degree of the two-axis paddle mixer. It is also possible to reduce the amount of added material (solidified material). That is, in the foundation work, as in the past, using a hydraulic excavator on site, in the case of a method of mixing water and cement with earth and sand on site, uniform mixing is difficult, to obtain concrete of the required strength Although it is necessary to increase the amount of cement, in the case of the present invention, uniform mixing is possible, so that the amount of cement can be reduced, the quality of soil concrete can be improved, and the efficiency of work can be improved.
[0041]
In addition, the constituent devices are made of a chemical-resistant, acid-resistant, and alkali-resistant material to provide a function of improving contaminated soil. For example, an alkaline aqueous solution is added from the watering device 40 to improve acidic soil, By adding an aqueous solution for improving soil contaminated by the effluent of contaminated soil, the contaminated soil can be improved and its use can be expanded.
[0042]
Further, in the present embodiment, the conveyor 16 discharges the improved earth and sand forward, so that the improved earth and sand discharged to the ground can be continuously and efficiently made uniform while traveling. That is, unlike the case where the improved earth and sand is carried backward, the improved earth and sand are not accumulated backward, so that a place for accumulation is unnecessary. In addition, it is not necessary to refill the accumulated earth and sand again, and the work can be performed efficiently. Also, a work machine for backfilling is not required, and work can be performed with a small number of work machines. In addition, since the improving material is mixed with the earth and sand by the mixing device 15, there is no need to spray the improving material on the ground, no annoying that the improving material is scattered in the vicinity, and the improving material is uniformly mixed. It can supply quality improved earth and sand.
[0043]
FIG. 6 shows another embodiment of a self-propelled soil improvement system for implementing the soil improvement method of the present invention. FIGS. 7 and 8 are side and front views of a self-propelled soil improvement machine 1A used in this system. It is. In this self-propelled soil improvement machine 1A, a blade 20 for leveling the ground is positioned on a frame of the traveling body 1 or on a front portion of a vehicle body 9 as shown by an up-down position adjusting device such as a hydraulic cylinder 21 or the like. It is adjustable. Further, the blade 20 is configured so as to be behind the front end of the improved earth and sand conveyer 16, that is, the discharge end (so that the front end of the conveyor 16, that is, the discharge end is located in front of the blade 20). .
[0044]
If such a blade 20 is provided, the self-propelled soil conditioner 1A is run and leveled by the blade 20, so that the improved soil can be leveled easily and flatly. Further, by setting the position of the front end of the conveyor 16 forward of the position of the blade 20, the improved earth and sand is dropped on the ground from the front of the self-propelled soil improvement machine 1A, and the self-propelled soil improvement machine 1A is advanced. The ground can be leveled by the blade 20.
[0045]
For this reason, the soil is excavated in a groove shape by the hydraulic excavator 2, followed by the self-propelled soil conditioner 1, the improved soil is backfilled from the conveyor 16 to the ground, and the blades 20 level the same. It is possible to obtain flattened and improved soil in a continuous operation with higher efficiency than in the embodiment.
[0046]
FIG. 9 is another embodiment of a self-propelled soil improvement system that implements the soil improvement method of the present invention. FIGS. 10 and 11 are partial side views of a self-propelled soil improvement machine 1B used in this system, It is a partial plan view.
[0047]
In the present embodiment, in the self-propelled soil conditioner 1B, the improved earth and sand discharged from the conveyor 16 is diffused in the width direction of the self-propelled soil conditioner at the front of the vehicle body 9 and dropped onto the ground. A revolving conveyor 23 is provided.
[0048]
That is, the revolving conveyor 23 is rotatable around a pivot shaft 24 provided at a lower part in front of the vehicle body 9, and the rear end of the conveyor 23 is located below the front end of the conveyor 16, and the front end of the conveyor 16 is The revolving conveyor 23 receives the improved earth and sand that has fallen from the ground, spreads it further forward, and drops it. In this embodiment, in order to enable adjustment of the inclination angle of the conveyor 23, a horizontal swing arm 25 is attached to the pivot shaft 24, and a bracket provided on the frame of the horizontal swing arm 25 and the swing type conveyor 23. 26 are connected to each other by pins 27 so as to be swingable in the vertical direction.
[0049]
Reference numeral 29 denotes a turning device installed above the pivot shaft 24 in the vehicle body 9 so that the axis of the pivot shaft 24 and the center of rotation are concentric. The turning device 29 turns a turning wheel 31 by a turning motor 30, and an arm 32 is fixed to the turning wheel 31. The arm 32 and the bracket 33 provided in front of the bracket 26 of the frame of the revolving conveyor 23 are connected to a wire or link 34 and a length adjuster 35 for adjusting the inclination angle of the conveyor, such as a turnbuckle. Connected.
[0050]
By operating the turning motor 30, the turning type conveyor 23 can take a posture in which the conveyor 23 is swung, for example, by 45 degrees each from left and right sides, as shown in FIG. Thereby, the improved earth and sand discharged from the conveyor 16 can be discharged in the width direction of the self-propelled soil conditioner 1B over a wider range than the width of the self-propelled soil conditioner 1B.
[0051]
FIG. 12 is a plan view showing an operation state in which soil improvement and backfilling are performed simultaneously with excavation of a road, for example, using the system shown in FIG. In this system, the excavator 2 excavates a predetermined excavation width (for example, the width of one lane) W on the road 36, and at the same time, performs soil improvement by the self-propelled soil improvement machine 1B, and self-propelled the improved soil. When dropping and filling back from the front of the type soil improvement machine 1B, the revolving conveyor 23 is swung to the left and right to drop the improved earth and sand so that the improved earth and sand is uniformly distributed over the entire excavation width W to a substantially uniform thickness. Can be backfilled.
[0052]
Further, for this reason, the traveling by the self-propelled soil improvement machine 1B or leveling by hand, or the leveling operation by the blade 20 is not necessarily required, or the amount of the leveling operation can be significantly reduced. For this reason, the self-propelled soil improvement machine 1B can be dedicated to soil improvement, the operation rate of the self-propelled soil improvement machine 1B for soil improvement work increases, and the efficiency of soil improvement work or overall work improves. I do.
[0053]
FIG. 13 shows another embodiment of the self-propelled soil improvement machine 1c for implementing the soil improvement method according to the present invention, in which a conveyor 16A for discharging the improved soil is installed facing backward. With such a configuration, although the benefits of the above-described embodiments installed forward as in the case of the conveyor 16 in the above-described embodiment cannot be obtained, the benefits of providing the water adding device 40 can be obtained.
[0054]
【The invention's effect】
According to the present invention, a self-propelled soil improvement machine is provided with a water adding device, and in a site where soil is improved, water is added to the soil and the improving material. The water content of the soil does not become excessively low, the particle size and the water content fall within the suitable ranges, and high quality improved soil suitable for backfilling is obtained.
[0055]
In addition, the present invention uses cement as an improving material and adds soil and water thereto, or uses a soil improvement solution in place of water, thereby making it possible to produce soil cement and improve contaminated soil. .
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a self-propelled soil improvement system for implementing a soil improvement method according to the present invention.
FIG. 2 is an enlarged side view of the self-propelled soil conditioner of FIG.
FIG. 3 is an enlarged plan view of the self-propelled soil conditioner of FIG. 1;
4 (A) is a front view of FIG. 2, and FIG. 4 (B) is a sectional view of a mixing device used for the self-propelled soil conditioner.
FIG. 5 is a block diagram showing a mixing control system of a soil improvement system for implementing the soil improvement method of the present invention.
FIG. 6 is a side view showing another embodiment of the soil improvement system for implementing the soil improvement method according to the present invention.
FIG. 7 is an enlarged side view of the self-propelled soil conditioner of FIG. 6;
FIG. 8 is a front view of FIG. 6;
FIG. 9 is a side view showing another embodiment of the soil improvement system for implementing the soil improvement method according to the present invention.
FIG. 10 is a partially enlarged side view of the self-propelled soil conditioner of FIG. 9;
FIG. 11 is a partially enlarged plan view of FIG. 10;
FIG. 12 is a plan view illustrating a working mode by the system of FIG. 9;
FIG. 13 is a side view showing another embodiment of the self-propelled soil improvement machine for implementing the soil improvement method according to the present invention.
[Explanation of symbols]
1, 1A: Self-propelled soil improvement machine, 2: Hydraulic excavator, 3: Traveling body, 4: Revolving device, 5: Revolving body, 6: Articulated front, 7: Bucket, 8: Crawler traveling body, 8a: Crawler, 9: Car body, 10: Hopper, 11: Container, 12: Hydraulic power unit, 13: Fixed amount supply device, 14: Conveyor, 15: Mixing device, 16: Conveyor, 17: Passage, 18, 19: Improved earth and sand, 20 : Blade: 21: Hydraulic cylinder; 23: Revolving conveyor; 24: Pivot shaft; 25: Horizontal revolving arm; 26: Bracket; 27: Pin; 29: Revolving device; 30: Revolving motor; : Arm, 33: bracket, 34: wire or link, 35: length adjuster, 36: road, 40: water supply device, 41: tank truck, 42: hose, 43: electric motor, 44: pump, 45 Flow detector, 46: 3-phase AC generator, 47: inverter, 49: speed detector, 50: Sediment height detector, 51: Controller, 52: drive motor, 53: recording device

Claims (6)

Put the earth and sand to be improved into the hopper provided at the front of the self-propelled soil improvement machine,
The earth and sand supplied from the hopper, the improving material supplied from a container mounted on the self-propelled soil conditioner, and the water supplied from the water supply device mounted on the self-propelled soil conditioner, Mix by the mixing device installed in the improved machine,
A method for improving soil quality, comprising transporting the improved soil mixed with the improving material to the outside of a self-propelled soil improvement machine by a conveyor. In the method for improving soil quality according to claim 1,
The container contains cement as an improving material,
In the mixing device, the soil supplied from the hopper, the cement supplied from the container, and the water supplied from the water adding device are mixed to produce soil cement instead of the improved soil. To improve soil quality. In the method for improving soil quality according to claim 1,
A soil improving solution for removing contaminants or adjusting pH is supplied to the mixing device instead of the water from the water adding device, and the soil and sand supplied from the hopper are mixed with the improving material supplied from the container. Soil improvement method characterized by making improved earth and sand. The method for improving soil quality according to any one of claims 1 to 3,
A method for improving soil quality, wherein the improved soil is dropped by a conveyor in front of a self-propelled soil improvement machine. In the soil improvement method according to claim 4,
While rotating the swivel conveyor provided at the front of the self-propelled soil conditioner, the improved soil transported in front of the self-propelled soil conditioner is diffused in the width direction of the self-propelled soil conditioner. Soil improvement method characterized by falling on the ground. In the soil improvement method according to claim 4 or 5,
A soil improvement method characterized in that the improved earth and sand that has fallen to the ground is leveled by a blade provided at the front of a self-propelled soil improvement machine.

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