CN115418983A - Construction method for prefabricated box culvert in highway-railway combined large-section shield tunnel - Google Patents
Construction method for prefabricated box culvert in highway-railway combined large-section shield tunnel Download PDFInfo
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- CN115418983A CN115418983A CN202211180948.0A CN202211180948A CN115418983A CN 115418983 A CN115418983 A CN 115418983A CN 202211180948 A CN202211180948 A CN 202211180948A CN 115418983 A CN115418983 A CN 115418983A
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- 238000010276 construction Methods 0.000 title claims abstract description 51
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 181
- 239000010959 steel Substances 0.000 claims abstract description 181
- 238000009434 installation Methods 0.000 claims abstract description 18
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000007493 shaping process Methods 0.000 claims abstract description 12
- 230000002787 reinforcement Effects 0.000 claims description 22
- 238000012423 maintenance Methods 0.000 claims description 17
- 238000005096 rolling process Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 7
- 239000002023 wood Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
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Abstract
The invention relates to a construction method for a prefabricated box culvert in a highway-railway combined large-section shield tunnel, which comprises the following steps: preparing for construction; binding steel bars; assembling and molding a mold; pouring concrete; demolding construction; transporting box culverts; and (5) mounting and constructing the box culvert. The invention has the beneficial effects that: the template construction is carried out through the adjustable template supporting bracket of the prefabricated section steel pedestal, so that the safety and convenience of demolding and mold closing are improved, and the manpower is saved; the steel bar framework shaping jig frame is adopted for steel bar binding construction, so that the construction quality is good, the speed is high, and the operation is convenient; the precast box culvert concrete pouring device is adopted for concrete pouring construction, the mechanization degree is high, the pouring is uniform, the personnel operation is reduced, and the cost is saved; transport the mount and transport and install through prefabricated box culvert transportation mount and prefabricated box culvert installation device, guaranteed the security of transportation, avoid damaging, the installation is fallen the position accurate, and the personnel of being convenient for operate, and construction quality can guarantee.
Description
Technical Field
The invention belongs to the field of tunnel engineering, and relates to a construction method for a prefabricated box culvert in a highway-railway combined large-section shield tunnel, which is particularly suitable for construction of a Pi-shaped prefabricated box culvert with a large section.
Background
The prefabricated assembly type box culvert is prefabricated on a special prefabricated field, and then is transported to a construction site from the prefabricated field for on-site installation and platform back backfilling, has very wide prospect, and is worthy of large-scale popularization. Although the application of the conventional assembled box culvert is common, the prefabrication of the box culvert in the large-section shield tunnel built by the combined highway and railway is rare, and the construction efficiency is often influenced by the aspects of reinforcement binding, template assembling, transportation, installation and the like of the assembled box culvert, so that the construction quality of the box culvert in the large-section shield tunnel built by the combined highway and railway cannot be guaranteed.
In view of the above, a new construction method for jointly building a large-section shield tunnel by using highway and railway is urgently needed for overcoming the defects in the conventional construction of the prefabricated box culvert, so that the construction efficiency is improved, the construction quality is improved, and the safety and reliability of the construction quality are ensured.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a prefabricated box culvert in a large-section shield tunnel built by roads and railways and a construction method.
This kind of highway railway is built big section shield tunnel and is built prefabricated box culvert in jointly, includes: the prefabricated steel pedestal, the steel reinforcement framework shaping jig frame, the box culvert concrete pouring device, the box culvert transportation fixing frame and the box culvert installation device are arranged on the box culvert;
the prefabricated section steel pedestal comprises section steel, a jack, an outer template, an inner template and a section steel frame; the profile steel is surrounded into a rectangle on the ground, jacks are arranged at two ends of the longitudinal profile steel, the jacks are connected with a lifting top plate, the profile steel is connected with an outer template and an inner template, a profile steel framework is arranged in the center of the profile steel, and a hydraulic jacking device is arranged between the inner template and the profile steel framework; a closed maintenance shed is arranged at the periphery of the prefabricated steel pedestal;
the bottom of the steel reinforcement framework shaping jig frame is a steel base plate, a plurality of vertical steel frames are arranged on the steel base plate, a plurality of transverse steel pipes are arranged on the vertical steel frames, holes are reserved for box culverts in gaps among the transverse steel pipes, and telescopic inner supporting jig frames are arranged in the reserved holes;
sliding rails are arranged on two sides of the box culvert, a cross rod with a sliding chute is arranged between the sliding rails, and the cross rod with the sliding chute is connected with a material box in a sliding manner to form a box culvert concrete pouring device;
the box culvert transportation fixing frame comprises a pushing beam, a box type frame and a telescopic pushing rod, wherein the bottom of the box type frame is provided with a profile steel underframe, the pushing beam is fixed on the profile steel frame, and the telescopic pushing rod penetrates through a pushing rod hole in the pushing beam;
the bottom of the box culvert installation device is provided with a track, the track is in sliding connection with an arc-shaped bottom support, a support end plate is arranged on the arc-shaped bottom support, and an operation platform is arranged on the support end plate.
Preferably, the method comprises the following steps: the hydraulic jacking device comprises a perforated U-shaped plate, an ear plate, a bolt, a threaded jacking rod and a threaded sleeve, wherein the ear plate is fixed on the inner template; the other side of the threaded sleeve is symmetrically connected with the section steel frame through a U-shaped plate, an ear plate, a bolt and a threaded ejector rod.
Preferably, the method comprises the following steps: the steel backing plate is arranged on the ground, and the two rows of vertical steel frames arranged at the center of the two rows of the two transverse ends of the steel backing plate are connected with the steel backing plate through fixing grooves; and an inclined support is arranged between the vertical steel frame arranged in the center of the four sides of the steel base plate and the steel base plate.
Preferably, the method comprises the following steps: the telescopic internal stay bed-jig includes rectangle staple bolt, plank, scalable vertical braces and scalable stull, the plank supports in reservation hole department through scalable vertical braces and scalable stull to it is fixed through the rectangle staple bolt.
Preferably, the method comprises the following steps: the closed maintenance shed comprises a fixed bottom plate, embedded grooves, color steel tiles, a profile steel support, a profile steel cross frame and a movable rolling door, wherein the embedded grooves are formed in the fixed bottom plate, the embedded grooves are connected to the bottom of the profile steel support, the profile steel cross frame is connected with the profile steel supports on two sides, and the color steel tiles are arranged on the top surface of the profile steel cross frame and the side surfaces of the profile steel supports; the closed maintenance shed is provided with movable rolling doors at two end faces of the fixed bottom plate.
Preferably, the method comprises the following steps: in the box culvert concrete pouring device, the rollers are connected in the sliding rails on the two sides of the box culvert in a rolling manner, the rollers are connected with the supporting rods, the bottom ends of the supporting rods on the two sides are connected through the cross rod with the chute, the roller is connected in the bottom chute with the cross rod with the chute, the steel pipe is connected below the roller through the hanger rods, and the steel pipe is connected with the material box through the lug plates with the holes.
Preferably, the method comprises the following steps: in the box culvert installation device, a rail is arranged on a rail backing plate, the rail backing plate is arranged on the ground, and an arc-shaped bottom support is connected with the rail through a sliding fixing piece and a sliding component; and a connecting steel pipe is arranged between the supporting end plate and the operating platform.
The construction method for jointly building the prefabricated box culvert in the large-section shield tunnel by the highway and the railway comprises the following steps of:
step one, construction preparation: controlling on-site traffic, cleaning the on-site, and checking and accepting materials;
step two, binding of steel bars: assembling a steel bar framework shaping jig frame, and binding steel bars on the telescopic inner support jig frame after the assembling to form a steel bar cage;
step three, assembling and entering a die: assembling a prefabricated section steel pedestal, mounting a protective clamping block on a reinforcement cage, hoisting the bound reinforcement cage into a mold and tightly jacking the reinforcement cage;
step four, pouring concrete: assembling a movable special pouring material box, and moving the material box through rollers and a cross rod with a sliding chute to pour concrete of the box culvert; after the concrete pouring is finished, installing a closed maintenance shed, and performing closed maintenance on the box culvert;
step five, demolding construction: disassembling all connecting pieces on the inner template and the outer template, and separating the inner template and the outer template by using a hydraulic jacking device;
step six, box culvert transportation: assembling the box culvert transportation fixing frame, pushing and fixing the box culvert through the telescopic push rod through the push rod hole, and transporting the box culvert after putting the box culvert into the box culvert transportation fixing frame;
seventhly, installing and constructing the box culvert: assembling an auxiliary landing construction platform of the rail movable type arc-shaped bottom support belt operation platform, after the box culvert is transported to the site, hoisting and placing the box culvert on a support end plate, moving the box culvert to a specified landing position, and then hoisting and installing the box culvert to finish installation construction; checking and accepting, and dismantling and returning equipment and machinery.
Preferably, in step six: when the box culvert is transported, the box culvert is placed in the box frame, and the telescopic pushing rod penetrates through the pushing rod hole on the pushing beam to push the box culvert to fix the box culvert.
The invention has the beneficial effects that:
1) Template construction is carried out through the adjustable template support bracket of prefabricated shaped steel pedestal, has promoted the security and the convenience of drawing of patterns, compound die, has practiced thrift the manpower.
2) The steel bar framework shaping jig frame is adopted for steel bar binding construction, so that the construction quality is good, the speed is high, and the operation is convenient.
3) Adopt prefabricated box culvert concrete placement device to carry out the concrete placement construction, degree of mechanization is high, pours evenly, has reduced personnel's operation, practices thrift the cost.
4) Transport the mount and transport and install through prefabricated box culvert transportation mount and prefabricated box culvert installation device, guaranteed the security of transportation, avoid damaging, the installation is fallen the position accurate, and the personnel of being convenient for operate, and construction quality can guarantee.
Drawings
FIG. 1 is a schematic structural view of a prefabricated steel platform according to the present invention;
FIG. 2 is a schematic view of an adjustable form-supporting bracket according to the present invention;
FIG. 3 is a schematic view of the structure of the enclosed curing shed according to the present invention;
FIG. 4 is a structural front view of a steel reinforcement framework shaping jig of the invention;
FIG. 5 isbase:Sub>A sectional view A-A of FIG. 4;
FIG. 6 is a schematic structural view of a retractable inner supporting jig on the steel reinforcement framework shaping jig of the invention;
FIG. 7 is a schematic view of a mobile special pouring bin structure;
FIG. 8 is a side view of a mobile special pouring bin structure;
FIG. 9 is a structural front view of a prefabricated box culvert transportation fixing frame;
FIG. 10 is a side view of a prefabricated box culvert transportation fixing frame structure;
FIG. 11 is a structural front view of an auxiliary landing construction platform of a rail-moving type arc-shaped bottom bracket belt operating platform;
fig. 12 is a structural side view of an auxiliary drop construction platform of the rail-moving type arc-shaped bottom support belt operating platform.
In the figure: 1-section steel, 2-jack, 3-fixed bottom plate, 4-embedded groove, 6-lifting top plate, 7-outer template, 8-inner template, 9-hydraulic jacking device, 10-section steel frame, 11-color steel tile, 12-screw ejector rod, 13-screw sleeve, 14-ear plate, 15-bolt, 16-perforated U-shaped plate, 17-section steel cross frame, 18-section steel bracket, 19-movable rolling door, 20-template, 21-reserved hole, 22-transverse steel pipe, 23-vertical steel frame, 24-rectangular hoop, 25-fixed groove, 26-inclined support, 27-steel backing plate, 28-telescopic vertical support, 29-telescopic cross support, 30-box culvert, 31-chute cross rod, 32-steel pipe, 33-perforated ear plate, 34-bin, 35-support rod, 36-roller, 37-slide rail, 38-roller, 39-suspender, 40-jacking beam, 41-box culvert frame, 42-ejector rod hole, 43-telescopic ejector rod, 44-section steel backing plate, 44-45-steel support rod, 45-steel rail, 40-sliding rail support, 40-sliding support plate, sliding rail support, 50-sliding rail support, and 50-48-sliding rail support.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for a person skilled in the art, several modifications can be made to the invention without departing from the principle of the invention, and these modifications and modifications also fall within the protection scope of the claims of the present invention.
Example one
As an embodiment, as shown in fig. 1 to 12, a prefabricated box culvert in a large-section shield tunnel built by roads and railways includes a prefabricated steel pedestal, a steel reinforcement framework shaping jig frame, a prefabricated box culvert concrete pouring device, a prefabricated box culvert transportation fixing frame and a prefabricated box culvert installation device.
As shown in fig. 1: the prefabricated section steel pedestal comprises section steel 1, jacks 2, lifting top plates 6, an outer template 7, an inner template 8, a hydraulic jacking device 9, a section steel frame 10 and a closed maintenance shed, wherein the section steel 1 is placed on the ground to form a rectangle, four jacks 2 are placed at two ends of longitudinal section steel 1 in parallel, the lifting top plates 6 are fixed on the jacks 2, the outer template 7 and the inner template 8 are fixed on the section steel 1, the section steel frame 10 is fixedly placed at the middle position of the section steel 1, one end of the hydraulic jacking device 9 is fixed on the inner template 8, and the other end of the hydraulic jacking device is fixed on the section steel frame 10;
as shown in fig. 2: the hydraulic jacking device comprises a perforated U-shaped plate 16, an ear plate 14, a bolt 15, a threaded jacking rod 12 and a threaded sleeve 13, wherein the ear plate 14 is fixed on the inner template 8, the perforated U-shaped plate 16 is fixed on the ear plate 14 through the bolt 15, one end of the threaded jacking rod 12 is fixed on the perforated U-shaped plate 16, and the other end of the threaded jacking rod is rotationally fixed on the threaded sleeve 13.
As shown in fig. 1 and 3: the closed maintenance canopy includes PMKD 3, embedded groove 4, various steel tile 11, shaped steel support 18, shaped steel crossbearer 17 and removal roll-up door 19, shaped steel support 18 is placed and is pressed from both sides tight fixedly through PMKD 3 in embedded groove 4, shaped steel crossbearer 17 is fixed on shaped steel support 18, various steel tile 11 is laid and is fixed on shaped steel crossbearer 17 top surface and shaped steel support 18 side, it fixes on the maintenance canopy both sides to remove roll-up door 19.
As shown in fig. 4: still include framework of steel reinforcement regularization bed-jig, framework of steel reinforcement regularization bed-jig includes fixed slot 25, bearing diagonal 26, rectangle staple bolt 24, plank 20, reserves entrance to a cave 21, horizontal steel pipe 22, vertical type steelframe 22, scalable erector 25, steel backing plate 27 and scalable stull 29, steel backing plate 27 is shelved and is fixed in ground, and fixed slot 25 sets up on horizontal steel backing plate 27, and vertical type steelframe 23 that has the telescopic internal stay bed-jig is fixed in fixed slot 25, and all the other vertical type steelframes 23 are fixed in on steel backing plate 27, horizontal steel pipe 22 vertical interval determining deviation is fixed on vertical type steelframe 23, 26 one end of bearing diagonal is fixed in vertical type steelframe 23, and the other end supports and is fixed in ground, the telescopic internal stay bed-jig sets up in the box culvert reservation hole 21 position.
As shown in fig. 5: telescopic internal stay bed-jig includes rectangle staple bolt 24, plank 20, scalable vertical braces 28 and scalable stull 29, plank 20 supports in reservation hole 21 department through scalable vertical braces 28 and scalable stull 29 to it is fixed through rectangle staple bolt 24.
As shown in fig. 7 and 8: still include box culvert concrete placement device, prefabricated box culvert concrete placement technique includes slide rail 37, gyro wheel 36, bracing piece 35, takes spout horizontal pole 31, steel pipe 32, foraminiferous otic placode 33, workbin 34, roller bearing 38 and jib 39, slide rail 37 sets up in box culvert 30 both sides, gyro wheel 36 is fixed in the bracing piece 35 bottom, take spout horizontal pole 31 to fix on two bracing pieces 35, roller bearing 38 sets up on taking spout horizontal pole 31, steel pipe 32 passes through the jib to be fixed on roller bearing 38, workbin 34 is fixed on jib 39 through foraminiferous otic placode 33 with steel pipe 32.
As shown in fig. 9 and 10: the prefabricated box culvert transporting and fixing frame comprises a pushing beam 40, a box frame 41, a pushing rod hole 42, a telescopic pushing rod 43 and a profile steel underframe 44, the profile steel underframe 44 is arranged at the bottom of the box frame 41, the pushing beam 40 is fixed on the profile steel frame 41, the pushing rod hole 42 is formed in the pushing beam 40, and the telescopic pushing rod 43 pushes and fixes the box culvert 30 through the pushing rod hole 42.
As shown in fig. 11 and 12: still meet including the installation of prefabricated box culvert, prefabricated box culvert installation technique includes track backing plate 52, track 51, the component 50 that slides, the mounting 45 that slides, arc collet 46, support end plate 47, operation platform 48 and connection steel pipe 49, track backing plate 52 is shelved in ground, track 51 is fixed on track backing plate 52, the component 50 that slides is fixed on arc collet 46 through the mounting 45 that slides, support end plate 47 and install on arc collet 46, connection steel pipe 49 is fixed in operation platform 48 bottom to fix on supporting end plate 47.
Example two
As another embodiment, the construction method for constructing a prefabricated box culvert in a large-section shield tunnel by combining roads and railways provided in the first embodiment includes the following steps:
step one, construction preparation: and (4) well performing on-site traffic control, protecting the site to be clean and tidy, and checking and accepting the construction materials entering the site.
Step two, binding steel bars: firstly assembling a steel reinforcement framework shaping jig frame, laying and fixing a steel base plate 27 on the ground, arranging a fixing groove 25 on a transverse steel base plate 27, fixing a vertical steel frame 23 with a telescopic inner support jig frame in the fixing groove 25, fixing the rest vertical steel frames 23 on the steel base plate 27, fixing transverse steel pipes 22 on the vertical steel frame 23 at a certain interval, fixing one end of an inclined support 26 on the vertical steel frame 23 and the other end of the inclined support on the ground, arranging the telescopic inner support jig frame at the position of a reserved hole 21 of a box culvert, supporting a wood board 20 at the reserved hole 21 through a telescopic vertical support 28 and a telescopic cross support 29, fixing the wood board through a rectangular hoop 24, and performing construction processes such as bending of steel reinforcements, welding of straightening machines and the like on the jig frame after assembling.
Step three, assembling a die: shaped steel 1 is placed and is enclosed the rectangle on ground, four jacks 2 are placed to vertical 1 both ends parallel of shaped steel, lift roof 6 is fixed in on jack 2, exterior sheathing 7 and interior sheathing 8 are fixed in on shaped steel 1, shaped steel frame 10 is fixed and is placed at 1 intermediate position of shaped steel, 9 one end of hydraulic pressure jacking device is fixed on interior sheathing 8, the other end is fixed on shaped steel frame 10, equipment hydraulic pressure jacking device, otic placode 14 is fixed on interior sheathing 8, foraminiferous U template 16 passes through bolt 15 to be fixed on otic placode 14, 12 one end of screw thread ejector pin is fixed on foraminiferous U template 16, the other end rotation is fixed in on screw thread sleeve 13, hang the steel reinforcement cage that the ligature is good in the mould.
Step four, the reinforcement cage is put into a mold: after a special plastic protection clamping block is arranged at a designated position on the steel reinforcement cage, the steel reinforcement cage is hung and placed into a mold according to specifications by a crane matched with a special lifting appliance and is tightly propped.
Step five, pouring concrete: the movable special pouring box is assembled, sliding rails 37 are arranged on two sides of a box culvert 30, rollers 36 are fixed to the bottoms of supporting rods 35, cross rods 31 with sliding grooves are fixed to the two supporting rods 35, rolling shafts 38 are arranged on the cross rods 31 with sliding grooves, steel pipes 32 are fixed to the rolling shafts 38 through hanging rods, the box 34 is fixed to the hanging rods 39 through the steel pipes 32 through the lug plates 33 with holes, and concrete pouring of the box culvert 30 is performed through front-back left-right movement of the box culvert.
Step six, maintenance: the installation of closed maintenance canopy, shaped steel support 18 is placed and is pressed from both sides tightly fixedly through PMKD 3 in embedded groove 4, and shaped steel crossbearer 17 is fixed on shaped steel support 18, and various steel tile 11 is laid and is fixed on shaped steel crossbearer 17 top surface and shaped steel support 18 side, removes rolling door 19 and fixes on the maintenance canopy both sides, seals the maintenance to the box culvert after concrete placement accomplishes.
Step seven, demolding construction: and (3) disassembling all connecting bolts, screw rods, pull rods and the like of the inner template 8 and the outer template 9, and separating the inner and outer templates by using a hydraulic system, wherein the sequence is opposite to the mold closing sequence.
Step eight, box culvert transportation: the box culvert transportation fixing frame is assembled, a section steel underframe 44 is arranged at the bottom of the box frame 41, the pushing beam 40 is fixed on the section steel frame 41, the pushing rod hole 42 is formed in the pushing beam 40, the telescopic pushing rod 43 pushes and fixes the box culvert 30 through the pushing rod hole 42, and the box culvert 30 is transported after being placed into the prefabricated box culvert transportation fixing frame.
Step nine, mounting and constructing the prefabricated box culvert: firstly, assembling an auxiliary falling position construction platform with a rail movable type arc-shaped bottom support belt operation platform, wherein a rail base plate 52 is placed on the ground, a rail 51 is fixed on the rail base plate 52, a sliding component 50 is fixed on an arc-shaped bottom support 46 through a sliding fixing piece 45, a supporting end plate 47 is installed on the arc-shaped bottom support 46, a connecting steel pipe 49 is fixed at the bottom end of the operation platform 48 and fixed on the supporting end plate 47, and the box culvert 30 is hoisted and placed on the supporting end plate after being transported to the site, and is hoisted and installed after being moved to a specified falling position.
And step ten, after the construction is finished, checking and accepting, and dismantling and withdrawing the equipment and the machinery.
Claims (9)
1. The utility model provides a big section shield tunnel is built jointly to highway railway prefabricated box culvert in, its characterized in that includes: the device comprises a prefabricated steel pedestal, a steel reinforcement framework shaping jig, a box culvert concrete pouring device, a box culvert transportation fixing frame and a box culvert installation device;
the prefabricated section steel pedestal comprises section steel (1), a jack (2), an outer template (7), an inner template (8) and a section steel frame (10); the profile steel (1) is enclosed into a rectangle on the ground, jacks (2) are arranged at two ends of the longitudinal profile steel (1), the jacks (2) are connected with a lifting top plate (6), the profile steel (1) is connected with an outer template (7) and an inner template (8), a profile steel frame (10) is arranged in the center of the profile steel (1), and a hydraulic jacking device (9) is arranged between the inner template (8) and the profile steel frame (10); a closed maintenance shed is arranged at the periphery of the prefabricated steel pedestal;
the bottom of the steel reinforcement framework shaping jig frame is a steel base plate (27), a plurality of vertical steel frames (23) are arranged on the steel base plate (27), a plurality of transverse steel pipes (22) are arranged on the vertical steel frames (23), a gap between the transverse steel pipes (22) is a box culvert reserved hole (21), and a telescopic inner supporting jig frame is arranged in the reserved hole (21);
the two sides of the box culvert (30) are provided with slide rails (37), a cross rod (31) with a chute is arranged between the slide rails (37), and the cross rod (31) with the chute is connected with a material box (34) in a sliding way to form a box culvert concrete pouring device;
the box culvert transportation fixing frame comprises a pushing beam (40), a box type frame (41) and a telescopic pushing rod (43), wherein a section steel underframe (44) is arranged at the bottom of the box type frame (41), the pushing beam (40) is fixed on the section steel frame (41), and the telescopic pushing rod (43) penetrates through a pushing rod hole (42) in the pushing beam (40);
the bottom of the box culvert installation device is provided with a track (51), the track (51) is connected with an arc-shaped bottom support (46) in a sliding mode, a supporting end plate (47) is arranged on the arc-shaped bottom support (46), and an operation platform (48) is arranged on the supporting end plate (47).
2. The precast box culvert in the highway-railway combined construction large-section shield tunnel according to claim 1, which is characterized in that: the hydraulic jacking device comprises a perforated U-shaped plate (16), an ear plate (14), a bolt (15), a threaded jacking rod (12) and a threaded sleeve (13), wherein the ear plate (14) is fixed on the inner template (8), the perforated U-shaped plate (16) is fixed on the ear plate (14) through the bolt (15), one end of the threaded jacking rod (12) is fixed on the perforated U-shaped plate (16), and the other end of the threaded jacking rod is rotationally fixed on the threaded sleeve (13); the other side of the threaded sleeve (13) is symmetrically connected with the section steel frame (10) through a U-shaped plate (16), an ear plate (14), a bolt (15) and a threaded push rod (12).
3. The highway-railway combined construction large-section shield tunnel inner prefabricated box culvert according to claim 1, characterized in that: the steel backing plate (27) is arranged on the ground, and the two rows of vertical steel frames (23) arranged at the center of the two transverse ends of the steel backing plate (27) are connected with the steel backing plate (27) through fixing grooves (25); an inclined support (26) is arranged between the vertical steel frame (23) arranged in the center of the four sides of the steel backing plate (27) and the steel backing plate (27).
4. The precast box culvert in the highway-railway combined construction large-section shield tunnel according to claim 1, which is characterized in that: the telescopic internal bracing jig comprises a rectangular hoop (24), a wood board (20), a telescopic vertical bracing (28) and a telescopic cross brace (29), wherein the wood board (20) is supported at the reserved hole (21) through the telescopic vertical bracing (28) and the telescopic cross brace (29) and is fixed through the rectangular hoop (24).
5. The highway-railway combined construction large-section shield tunnel inner prefabricated box culvert according to claim 1, characterized in that: the closed maintenance shed comprises a fixed bottom plate (3), embedded grooves (4), color steel tiles (11), a profile steel support (18), a profile steel cross frame (17) and a movable rolling door (19), wherein the embedded grooves (4) are formed in the fixed bottom plate (3), the bottom of the profile steel support (18) is connected with the embedded grooves (4), the profile steel cross frame (17) is connected with the profile steel supports (18) on two sides, and the color steel tiles (11) are arranged on the top surface of the profile steel cross frame (17) and the side surfaces of the profile steel supports (18); the closed maintenance shed is provided with movable rolling doors (19) on two end faces of the fixed bottom plate (3).
6. The precast box culvert in the highway-railway combined construction large-section shield tunnel according to claim 1, which is characterized in that: in the box culvert concrete pouring device, rollers (36) are connected in a rolling manner in slide rails (37) on two sides of a box culvert (30), the rollers (36) are connected with supporting rods (35), the bottoms of the supporting rods (35) on two sides are connected through a cross rod (31) with a chute, a rolling shaft (38) is connected in a bottom chute with the cross rod (31) with the chute, a steel pipe (32) is connected below the rolling shaft (38) through a hanging rod (39), and the steel pipe (32) is connected with a feed box (34) through a lug plate (33) with holes.
7. The precast box culvert in the highway-railway combined construction large-section shield tunnel according to claim 1, which is characterized in that: in the box culvert installation device, a track (51) is arranged on a track base plate (52), the track base plate (52) is arranged on the ground, and an arc-shaped bottom support (46) is connected with the track (51) through a sliding fixing piece (45) and a sliding component (50); a connecting steel pipe (49) is arranged between the supporting end plate (47) and the operating platform (48).
8. The construction method for constructing the prefabricated box culvert in the large-section shield tunnel by the combination of the highway and the railway according to claim 1, which is characterized by comprising the following steps of:
step one, construction preparation: controlling on-site traffic, cleaning the on-site, and checking and accepting materials;
step two, binding steel bars: assembling a steel bar framework shaping jig frame, and binding steel bars on the telescopic inner support jig frame after the assembly to form a steel bar cage;
step three, assembling and entering a die: assembling a prefabricated steel bar pedestal, and after mounting a protective clamping block on the reinforcement cage, hoisting the bound reinforcement cage into a mold and tightly jacking the reinforcement cage;
step four, pouring concrete: assembling a movable special pouring box, and moving the box (34) through a roller (36) and a cross bar (31) with a sliding chute to pour concrete of the box culvert (30); after the concrete pouring is finished, a closed maintenance shed is installed, and closed maintenance is carried out on the box culvert (30);
step five, demolding construction: disassembling all connecting pieces on the inner template (8) and the outer template (9), and separating the inner template (8) and the outer template (9) by using a hydraulic jacking device (9);
step six, box culvert transportation: assembling the box culvert transportation fixing frame, pushing and fixing the box culvert (30) through a telescopic pushing rod (43) through a pushing rod hole (42), and transporting the box culvert (30) after putting the box culvert into the box culvert transportation fixing frame;
seventhly, installing and constructing box culverts: assembling an auxiliary falling construction platform of the rail moving type arc-shaped bottom support belt operation platform, after the box culvert (30) is transported to the site, hoisting the box culvert on a support end plate (47), moving the box culvert to a specified falling position, and then hoisting and installing the box culvert to finish installation construction; checking and accepting, and dismantling and withdrawing equipment and machinery.
9. The construction method for jointly building the prefabricated box culvert in the large-section shield tunnel by the road and the railway according to claim 8, wherein the sixth step comprises the following steps: when transporting the box culvert (30), the box culvert (30) is placed in the box-type frame (41), and the telescopic jacking rods (43) penetrate through the push rod holes (42) on the jacking beams (40) to jack and fix the box culvert (30).
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| CN202211180948.0A CN115418983B (en) | 2022-09-27 | 2022-09-27 | Construction method for prefabricated box culvert in highway-railway co-construction large-section shield tunnel |
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| CN202211180948.0A CN115418983B (en) | 2022-09-27 | 2022-09-27 | Construction method for prefabricated box culvert in highway-railway co-construction large-section shield tunnel |
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| CN115418983B (en) | 2023-07-28 |
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