CN114109415A - Construction method for disassembling tunnel of shield machine of non-expanding excavation chamber - Google Patents
Construction method for disassembling tunnel of shield machine of non-expanding excavation chamber Download PDFInfo
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- CN114109415A CN114109415A CN202111449860.XA CN202111449860A CN114109415A CN 114109415 A CN114109415 A CN 114109415A CN 202111449860 A CN202111449860 A CN 202111449860A CN 114109415 A CN114109415 A CN 114109415A
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- shield
- tunnel
- block
- disassembling
- segment
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
Abstract
The invention provides a construction method for disassembling a tunnel of a shield machine of a non-expanding excavation chamber, which comprises the following steps: disassembling construction preparation, disassembling a belt conveyor, disassembling a secondary fan, disassembling a rear matched trailer, disassembling a thrust cylinder, disassembling a screw machine, disassembling a segment erector, disassembling an H frame, disassembling a mannequin, disassembling a main drive motor and a main drive, disassembling a cutter head, and disassembling a middle shield and a front shield; according to the invention, cavern expanding excavation is not required, disturbance to surrounding rocks of the tunnel is reduced, water and soil around a construction site are ensured not to be damaged to the maximum extent, construction workload is reduced, and construction safety and economy are improved; the invention occupies less space, reduces the consumption of materials in the disassembling process, reduces the occupation of the space, and reduces the influence of equipment vibration, noise, dust and the like under the condition of no interference of personnel, machinery and the like.
Description
Technical Field
The invention relates to the technical field of shield machine disassembly construction, in particular to a method for disassembling a shield machine in a non-expansion excavation chamber.
Background
With the rapid development of infrastructure construction in China, various tunnels under construction and planning construction are more and more, the shield machine is widely applied as the most advanced equipment for the current tunnel construction, and after the shield machine construction is completed, the disassembly of the shield machine is a necessary and very important construction link in the whole construction process.
At present, shield construction is mostly applied to urban subway projects, after a shield machine finishes a section tunneling task, the shield machine basically performs dismantling operation in places such as a subway station and a middle air shaft, and large hoisting equipment is used for hoisting out dismantled parts, and the dismantling sequence of the shield machine is that dismantling transportation is performed according to the sequence of all parts of the equipment going out of a tunnel, such as application numbers CN202010848295.3 and CN 201810420966.9. To tunnels such as some water conservancy, mine, different with city subway tunnel, do not have station, middle air shaft etc. to disassemble as the place usually, disassemble under the traditional condition and need carry out the cavern and expand and dig to installation lifting device assists disassembling, like application number CN 201710025584.1. Because the conventional modes such as blasting expand the excavation chamber and can cause great disturbance to the country rock, influence country rock stability, seriously even easily lead to tunnel collapse, the security is relatively poor, and construction work load is great, the cycle length, and then influence construction economic benefits.
Disclosure of Invention
The invention provides a tunnel disassembling construction method of a tunnel shield machine without an expanding excavation chamber, and aims to solve the problems that the tunnel expanding excavation safety is poor, the construction quantity is large and the period is long in a traditional tunnel shield machine disassembling mode.
In order to achieve the above object, an embodiment of the present invention provides a method for dismantling a tunnel of a shield machine in a non-expandable excavation chamber, including:
the method comprises the following steps: stopping the shield tunneling machine after the shield tunneling machine tunnels to a specified position, grouting and reinforcing the rear part of the shield tail, fixing the tunnel face and the cutter head, and stably supporting the tunnel face;
step two: the belt conveyor, the secondary fan and the rear matched trailer are sequentially dismantled, and the belt conveyor, the secondary fan and the rear matched trailer are conveyed out of the tunnel;
step three: sequentially removing the supporting shoes, the fixed ring plates and the anti-torsion bolts of the propulsion oil cylinder, removing an oil pipe of the propulsion oil cylinder and a hydraulic pipeline of a propulsion system, and withdrawing the propulsion oil cylinder to the hoisting position of the segment crane for hoisting;
step four: dismantling the screw machine, and conveying the screw machine to a battery car for transferring to the outside of the tunnel;
step five: the working platform, the pipeline bracket and the large lifting lug of the segment erector are dismantled at one time and transported to a segment car to be transported out of the tunnel; fixing a joist of the segment erector with a segment car, and transporting the fixed joist to the outside of the tunnel;
step six: pre-tensioning the H frame, removing a connecting bolt of the H frame, placing the H frame on a transport vehicle and transporting the H frame to the outside of the tunnel;
step seven: pre-tensioning the man compartment, cutting off a man compartment fixing support, removing connecting bolts of the man compartment and the partition plate, transporting the man compartment to a plate trailer, and transporting the man compartment to the outside of the tunnel after fixing;
step eight: removing the torque limiter and the main driving motor shaft connecting bolt, pulling out the main driving motor, hoisting the main driving motor to the flat car and transporting the flat car to the outside of the tunnel; dismantling a main driving hydraulic pipeline, dismantling a main driving speed reducer, moving to an originating vertical shaft by using the battery car and hoisting to the ground; removing a connecting support of a main drive and a rotary joint, supporting and fixing a cutter head, removing a connecting bolt of the main drive and the cutter head, cutting off a partition plate in the central area of a front shield, and transporting the main drive to the outside of a tunnel through a main drive transport vehicle;
step nine: disassembling the cutter head into a cutter head middle block, a cutter head lower block, a cutter head left block, a cutter head right block and a cutter head upper block, and transporting the cutter head middle block, the cutter head lower block, the cutter head left block, the cutter head right block and the cutter head upper block to the outside of the tunnel;
step ten: and (4) disassembling the front shield and the middle shield, and conveying the disassembled shield body blocks to the outside of the tunnel through the diesel locomotive.
In the first step, holes are formed in the face, and round steel bars are inserted into the face and the cutter head to fix the face and the cutter head.
In the second step, when the belt conveyor is dismantled, the belt conveyor is dismantled after all the belts are recovered, then the main parts of the belt conveyor are dismantled, and finally the outer support of the continuous belt conveyor tunnel is dismantled; when the secondary fan is dismantled, the secondary fan is cut off, and the lower part of the rear part of the cross beam at the secondary fan is conveyed out of the tunnel to the internal combustion locomotive; when the rear matched trailer is dismantled, the related hydraulic, fluid, electrical and other pipelines of the rear matched trailer are firstly dismantled in a protective way, the connecting pin shafts between the rear matched trailers are dismantled, and then the rear matched trailers are conveyed out of the tunnel through the diesel locomotive.
In the third step, firstly removing the support shoes of the propulsion oil cylinder, then removing the oil cylinder fixing ring plate and the anti-torsion bolt, removing the oil pipe of the propulsion oil cylinder, then plugging the oil pipe of the propulsion oil cylinder by using a special plug to prevent pollution, closing the propulsion system, removing a hydraulic pipeline of the propulsion system, plugging a main oil return pipe of the shield tunneling machine, and ensuring that other systems except the propulsion system of the shield tunneling machine normally operate; the segment erector is used for pulling out the propulsion oil cylinder to a proper position, the propulsion oil cylinder is fixed with the grasping head of the segment erector, the propulsion oil cylinder is rotated to the bottom by rotating the segment erector, and the propulsion oil cylinder is retracted to the hoisting position of the segment crane and hoisted out by using the segment feeder.
In the fourth step, a chain block is arranged by embedding a steel plate in the formed tunnel pipe piece as a lifting point, and the chain block is connected and fixed to a front-end lifting lug of the spiral machine; arranging a lifting point and a chain block on the segment erector, and connecting and fixing the chain block on a spiral shaft at the front end of a spiral machine; the spiral machine is guided to the battery car through each chain block and then is conveyed to the outside of the tunnel.
In the fifth step, firstly, the segment erector is rotated, a grabbing head of the segment erector is positioned right above the grabbing head, and a working platform, a pipeline support and a lifting point of the segment erector are dismounted through a chain block; laying a walking track of the diesel locomotive to the lower part of the segment erector, arranging a lifting lug at the top of the shield body to integrally move the segment erector upwards, welding and fixing a joist of the segment erector and a segment car, and then conveying the segment erector and the segment car outside a tunnel.
And step six, arranging a lifting point at the shield tail, using a pin hole of the shield hinged oil cylinder and the lifting point of the shield tail, pre-tensioning the H frame by using a chain block, removing a connecting bolt of the H frame, and placing the H frame on the transport vehicle by using the chain block and transporting the H frame out of the hole.
Respectively welding lifting points at the front and rear positions of the middle upper part of the manned cabin, welding one lifting point at the cabin door end, pre-tensioning the manned cabin through a chain block, cutting off a manned cabin fixing support, and removing a connecting bolt of the manned cabin and the partition plate; the method comprises the steps of arranging lifting points on the duct pieces, hanging chain blocks, assisting to transport the human cabin through the chain blocks, transporting the human cabin to the plate trailer through the alternating action of the chain blocks, and transporting the human cabin to the outside of a tunnel after fixing.
In the step eight, a transparent cover at the rear part of the main driving motor is opened, the torque limiter is removed, a main driving motor shaft connecting bolt is removed, the main driving motor is pulled out by using a hoist, and the main driving motor is hoisted to the flat car to be pulled out of the tunnel; dismantling the main driving hydraulic pipeline, sealing the main driving hydraulic pipeline and the interface by using a plug and then wrapping; dismantling the main driving speed reducer and the speed reducer motor, moving to an initial vertical shaft by using the battery car, and hoisting to the ground; removing a main drive and rotary joint connecting support, supporting and fixing a cutter head, and removing a main drive and cutter head connecting bolt; cutting off a partition board in the central area of the anterior shield; and (4) pouring the main drive transport vehicle to a position below the main drive, and transporting the main drive to the center of the main drive transport vehicle in the tunnel direction through the translation oil cylinder for reinforcement and then transporting out of the hole.
In the tenth step, the anterior shield is divided into an anterior shield upper block, an anterior shield left block, an anterior shield right block and a front end lower block, and the middle shield is divided into a middle shield upper block, a middle shield left block, a middle shield right block and a middle shield lower block; firstly, cutting off oil cylinder partition plates of the front shield upper block and the middle shield upper block; pre-tensioning the upper split block of the middle shield, and lowering the upper split block of the middle shield through a chain block for dismantling; welding limit baffles among the middle shield left block, the middle shield right block and the middle shield lower block, tensioning the middle shield left block and the middle shield right block by using a chain block, and cutting off welding seams among the middle shield left block, the middle shield right block and other blocks; respectively rotating the middle shield left block and the middle shield right block to be horizontal and then hoisting the blocks to a flat plate of the diesel locomotive; dividing the upper shield block into a front part, a middle part and a rear part, wherein the middle part of the upper shield block is one half of the upper shield block, and removing the middle part of the upper shield block and then the front part and the rear part of the upper shield block by using the front part and the rear part of the upper shield block to set lifting points; pre-tightening the front shield left block and the front shield right block, cutting off welding seams among the front shield left block, the front shield right block and other blocks, rotating the front shield left block and the front shield right block to be horizontal through a chain block, and then hoisting the front shield left block and the front shield right block to a flat plate of the internal combustion locomotive; respectively at shield tail top and the pre-buried steel sheet setting hoisting point of section of jurisdiction, divide the piece under well shield and divide the piece under the front end to disassemble.
The scheme of the invention has the following beneficial effects:
(1) according to the invention, cavern expanding excavation is not required, disturbance to surrounding rocks of the tunnel is reduced, water and soil around a construction site are ensured not to be damaged to the maximum extent, construction workload is reduced, and construction safety and economy are improved.
(2) The invention occupies less space, reduces the consumption of materials in the disassembling process, reduces the occupation of the space, and reduces the influence of equipment vibration, noise, dust and the like under the condition of no interference of personnel, machinery and the like.
Drawings
FIG. 1 is a flow chart of the construction method for disassembling the tunnel of the shield machine of the non-expanding excavation chamber;
FIG. 2 is a grouting flow chart of the construction method for disassembling the tunnel of the shield machine without the enlarging excavation chamber;
FIG. 3 is a schematic view of the tunnel face and the cutter head fixation of the construction method for disassembling the tunnel inside the shield machine without the enlarging excavation chamber of the invention;
FIG. 4 is a schematic diagram of an opening structure of a front shield partition plate of the construction method for disassembling the shield machine in the tunnel without the enlarging excavation chamber;
FIG. 5 is a schematic view of dismantling a belt of a belt conveyor in the tunnel dismantling construction method of the tunnel shield machine of the non-expanding excavation chamber of the invention;
FIG. 6 is a schematic view of the screw machine disassembly in the tunnel of the shield tunneling machine of the non-extended excavation chamber of the present invention;
FIG. 7 is a disassembly schematic view of a segment erector in the tunnel disassembly construction method of a non-expanding excavation chamber shield machine of the invention;
FIG. 8 is a schematic view of the disassembly of the H-frame in the tunnel of the shield tunneling machine of the non-extended excavation chamber of the present invention;
FIG. 9 is a schematic illustration of disassembly of a man-cabin in a tunnel disassembly construction method of a non-extended excavation chamber shield machine of the present invention;
FIG. 10 is a schematic diagram of a front shield partition plate cutting in the method for disassembling the shield machine in the tunnel of the non-expanding excavation chamber of the present invention;
FIG. 11 is a schematic diagram of cutterhead block cutting in the construction method for disassembling the tunnel of the shield machine of the non-expanding excavation chamber;
FIG. 12 is a first schematic diagram of block disassembly on a middle shield in the tunnel disassembly construction method of the tunnel-free shield tunneling machine of the invention;
FIG. 13 is a second schematic diagram of block disassembly on a middle shield in the tunnel disassembly construction method of the tunnel-free shield tunneling machine of the invention;
FIG. 14 is a first schematic diagram of left and right shield partitioning disassembly in a tunnel of a shield tunneling machine without an enlarged excavation chamber;
FIG. 15 is a second schematic diagram of a left-right shield block solution of the method for in-tunnel dismantling of a shield tunneling machine without an enlarging excavation chamber according to the present invention
FIG. 16 is a structural diagram of a disassembly tool of a segment erector for the construction method of the shield machine in-tunnel disassembly of the non-expanding excavation chamber;
FIG. 17 is a first structural schematic view of a main driving carrier vehicle of the construction method for disassembling the tunnel of the shield machine of the non-extended excavation chamber;
FIG. 18 is a structural schematic view II of a main driving carrier vehicle of the construction method for disassembling the tunnel of the shield machine of the non-expanding excavation chamber;
FIG. 19 is a third schematic structural view of a main drive carrier vehicle of the construction method for disassembling the tunnel of the shield machine of the non-extended excavation chamber of the present invention;
[ description of reference ]
1-palm surface; 2-cutter head; 3-anterior shield; 4-round steel; 5-main driving; 6-main drive motor; 7-a screw machine; 8-an open pore structure; 9-a belt breakage part; 10-a driving wheel; 11-a driven wheel; 12-a tension wheel; 13-a transition wheel; 14-battery car; 15-segment erector; 16-disassembling tooling of a segment erector; 17-H frame; 18-human cabin; 19-tooling upright columns; 20-tooling inclined strut; 21-tooling cross beam; 22-a limit baffle; 23-a stand column; 24-a stent diagonal strut; 25-a bracket beam; 26-a bracket limiting transverse plate; 27-a stationary base; 28-telescopic oil cylinder; 29-a support plate; 30-a pin shaft; 31-a base; 32-a fixed plate; 33-a cylinder base; 34-a connecting plate; 35-a drawing hole; 36-beam steel frame; 37-main beam steel frame; 38-supporting steel frames; 39-reinforcing ribs; 40-i-beam rail; 41-axle; 42-a bearing; 43-a bearing seat; 44-front wheels; 45-rear wheel; 46-fixed support columns; 47-a fixed baffle; 48-cutting the contour line; 49-cutter block cutting line.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
Example 1
The invention provides a tunnel inner dismantling construction method of a tunnel shield machine without an enlarging excavation chamber, aiming at the problems of poor tunnel chamber enlarging excavation safety, large construction amount and long period of the traditional shield machine dismantling mode.
As shown in fig. 1, an embodiment of the present invention provides a method for disassembling a shield machine in a tunnel without an enlarged excavation chamber, including:
the method comprises the following steps: stopping the shield tunneling machine after the shield tunneling machine tunnels to a specified position, grouting and reinforcing the rear part of the shield tail, forming a hole in the tunnel face 1, fixing the tunnel face 1 and the cutter head 2 by inserting round steel 4 on the tunnel face 1 and the cutter head 2, fixing the tunnel face 1 and the cutter head 2, and stably supporting the tunnel face 1;
grouting slurry into the wall of the duct piece through reserved grouting holes of the duct piece, and continuously forming 10 rings at the rear part of the shield tail to ensure that each point position of each ring is grouted; during grouting, mounting a reverse grouting valve at a reserved grouting hole of the duct piece, connecting the valve with a grouting pipe, opening the reverse grouting valve, and pressing the two kinds of grout into the wall of the duct piece through a grouting pump; after the grout is injected, closing the grout reversing valve and releasing pressure of the pipeline, and finally removing the connecting grouting pipe and cleaning the pipeline by using water; closing a slurry discharge valve after one grouting hole is injected, discharging the pressure of a grouting pipeline at a grouting pump to avoid slurry backflow and reverse spraying, and finally disassembling a grouting pipe; grouting pressure: the secondary grouting pressure is not required to be too large, the pipe piece is prevented from being extruded, the pump head pressure of the secondary grouting pump is not more than 1MPa, and the grouting pressure at the position where the double-liquid slurry is converged is not more than 0.3 MPa. According to construction experience and specification requirements, the selected grouting is double-liquid cement with the water glass diluted by 1:1, the water cement ratio of cement paste is 1:1, the volume ratio of cement paste to water glass is 1:0.8, and the gelling time of the cement paste is 30 seconds to 1 minute. The grouting process is as shown in figure 2,
determining the stop position of the cutter head 2, forming holes in a partition plate between the tunnel face 1 and the front shield 3, fixing the cutter head 2 by using round steel 4 to form a simply supported beam structure, and welding and fixing the outer ring of the cutter head 2 and the outer ring of the front shield 3. The face surface is connected with the cutter head as shown in figure 3. The total number of the holes is 11, and the symmetrical perforated structures 8 are formed and distributed on the upper part, the lower part, the left part and the right part of the cutter head to form blocks. The open cell structure is shown in figure 4.
Step two: the belt conveyor, the secondary fan and the rear matched trailer are sequentially dismantled, and the belt conveyor, the secondary fan and the rear matched trailer are conveyed out of the tunnel;
in order to ensure that other main parts of the shield machine can be smoothly transported out, the belt conveyor needs to be firstly disassembled, the main machine belt is slowly rotated to find the vulcanization joint at the lower layer belt of the driven end, and the belt is broken at the vulcanization joint. The belt is pulled to the trolley by the diesel locomotive, and then the belt is completely withdrawn; disassembling the belt conveyor after the belt is completely recycled, then disassembling main parts of the belt conveyor, and finally disassembling the outer support of the continuous belt conveyor tunnel; the motor and the driving roller are fixed, the cross beam below the belt conveyor main machine is directly cut off, and the belt conveyor main machine is placed on an internal combustion locomotive to be transported out. The belt conveyor roller, the upper bracket, the cross beam and the lower bracket are sequentially dismantled and transported to the ground; as shown in fig. 5, the belt conveyor comprises a driving wheel 10, a driven wheel 11, a tension wheel 12 and a transition wheel 13, and a belt breakage part 9 is positioned between the tension wheel 12 and the driven wheel 11. When the secondary fan is dismantled, the secondary fan is cut off, and the lower part of the rear part of the cross beam at the secondary fan is conveyed out of the tunnel to the internal combustion locomotive. When the rear matched trailer is dismantled, the related hydraulic, fluid, electrical and other pipelines of the rear matched trailer are firstly dismantled in a protective way, the connecting pin shafts between the rear matched trailers are dismantled, and then the rear matched trailers are conveyed out of the tunnel through the diesel locomotive.
Step three: sequentially removing the supporting shoes, the fixed ring plates and the anti-torsion bolts of the propulsion oil cylinder, removing an oil pipe of the propulsion oil cylinder and a hydraulic pipeline of a propulsion system, and withdrawing the propulsion oil cylinder to the hoisting position of the segment crane for hoisting;
when the thrust oil cylinder is removed, firstly removing a support shoe of the thrust oil cylinder, then removing an oil cylinder fixing ring plate and an anti-torsion bolt, removing an oil pipe of the thrust oil cylinder, then plugging the oil pipe of the thrust oil cylinder by using a special plug to prevent pollution, closing a thrust system, removing a hydraulic pipeline of the thrust system, plugging a main oil return pipe of a shield tunneling machine, and ensuring that other systems except the thrust system of the shield tunneling machine normally operate; the segment erector 15 is utilized to extract the thrust cylinder to a proper position, the thrust cylinder is fixed with the segment erector grabbing and lifting head through the cylinder fixing tool, the thrust cylinder is rotated to the bottom by the rotating segment erector 15, and the thrust cylinder is retracted to a segment crane hoisting position by the feeding machine and hoisted out.
Step four: dismantling the screw machine 7 and conveying the screw machine to the battery car 14 to be conveyed out of the tunnel; pre-burying a steel plate in the formed tunnel pipe to serve as a lifting point, wherein the positions of weldable lifting lugs such as a shield tail and the like are auxiliary lifting points when the screw conveyor is lifted, and the welding lifting lugs are fixedly connected to the front-end lifting lug of the screw conveyor through a chain block; arranging a lifting point and a chain block on the segment erector 15, and connecting and fixing the chain block on a spiral shaft at the front end of the spiral machine 7; the spiral machine is guided to the battery car 14 through each chain block and then conveyed to the outside of the tunnel. The screw machine 7 is disassembled as shown in fig. 6.
Step five: the working platform, the pipeline bracket and the hoisting point of the segment erector 15 are dismantled at one time and transported to a segment car to be transported out of the tunnel; fixing a joist of the segment erector 15 with a segment car and transporting the fixed joist to the outside of the tunnel; the method specifically comprises the following steps: firstly, rotating a segment erector 15 to enable a grabbing head of the segment erector 15 to be positioned right above the segment erector, and dismantling a working platform, a pipeline bracket and a lifting point of the segment erector 15 through a chain block; lay diesel locomotive walking track to segment erector 15 below, set up the lug at the shield body top and move 300mm with segment erector on the whole, then fixed with segment erector 15 joists (segment erector is whole) and segment car, transport outside the tunnel again, it disassembles transportation frock 16 and is used for the location to be provided with segment erector on the segment car segment erector. Disassembly of the segment erector is shown in FIG. 7.
Step six: pre-tensioning the H frame 17, removing a connecting bolt of the H frame 17, placing the H frame 17 on a transport vehicle and transporting the H frame 17 to the outside of the tunnel; in the embodiment, the H frame 17 of the shield machine is 5.5t in weight, and the platform in the shield body, the spiral machine 7, the segment erector 15 and the like need to be guaranteed to be completely dismantled before the H frame 17 is dismantled; welding a hoisting point at a proper position of the shield tail or searching a proper hoisting point on the duct piece; pre-tensioning the H frame 17 by using a chain block by using a pin hole of a middle shield hinged oil cylinder and a hoisting point welded on a shield tail; removing the connecting bolts of the H frame 17; the H-shaped frame 17 is placed on a transport vehicle and transported out of the hole by the simultaneous action of 3 chain blocks of 10 t. The H-frame disassembly is shown in fig. 8.
Step seven: pre-tensioning the man cabin 18, cutting off a man cabin fixing support, removing connecting bolts of the man cabin 18 and a partition plate, transporting the man cabin 18 to a plate trailer, and transporting the man cabin 18 to the outside of a tunnel after fixing; the method specifically comprises the following steps: 4 lifting lugs are welded at the front and rear positions of the middle upper part of the man compartment 18, and one lifting lug is welded at the door end of the man compartment 18; a plurality of lifting lugs are welded at proper positions of the shield tail and the top of the middle shield, a lifting point is found at the proper position of the duct piece, and 4 chain blocks of 10t are used for pre-tensioning; cutting off the human cabin fixing bracket; dismantling the connecting bolts of the manned cabin 18 and the partition plate; the hand chain block is hung on the segment to assist in transporting the manned cabin 18, the manned cabin 18 is transported to the plate trailer through the alternating action of the hand chain block, and the fixed manned cabin is transported out of the hole. Disassembly of the mannequin is shown in figure 9.
Step eight: opening a transparent cover at the rear part of the main driving motor, removing a torque limiter, removing a main driving motor shaft connecting bolt, pulling out the main driving motor 6 by using 3 5-ton hoists, lifting to a flat car and pulling out a tunnel; dismantling the main driving hydraulic pipeline, sealing the main driving hydraulic pipeline and the interface by using a plug and then wrapping; dismantling the main driving speed reducer and the speed reducer motor, moving to an initial vertical shaft by using the battery car, and hoisting to the ground; the main drive 5 is detached from the rotary joint connecting support, the cutter head 2 is supported and fixed, and the main drive 5 and the cutter head connecting bolt are detached; cutting off a partition board in the central area of the anterior shield; and (3) pouring the main drive transport vehicle to a position below the main drive, and transporting the main drive 5 to the center of the main drive transport vehicle in the tunnel direction through the translation oil cylinder for reinforcement and then transporting out of the hole. The anterior shield partition cut is shown in fig. 10, which includes a cut outline 48.
Step nine: disassembling the cutter head 2 into a cutter head middle block, a cutter head lower block, a cutter head left block, a cutter head right block and a cutter head upper block, and transporting the blocks to the outside of the tunnel; in order to prevent dangerous factors such as front-back swing, left-right swing and up-down sliding of the blocks when the cutter head 2 is detached, a limiting structure is built when the cutter head 2 is detached, and the cutter head block detaching space is limited and matched with machinery to limit and provide a temporary hoisting point according to the block condition of the cutter head 2, so that the cutter head 2 is detached. The cutter segment is shown in fig. 11, including cutter segment cut lines 49.
The method comprises the following specific steps:
cutting off the oil cylinder partition plates of the front shield upper partition and the middle shield upper partition;
removing the upper blocks of the middle shield: as shown in fig. 12 and 13, a disassembling tool is arranged on the middle shield in a partitioning manner, the disassembling tool includes a tool upright post 19, a tool lifting lug, a tool diagonal brace 20 and a tool cross beam 21, the disassembling tool is fixedly welded to the bottom of the upper partition to be disassembled through the tool upright post 19, the tool diagonal brace 20 is obliquely connected with the tool upright post 19 and the upper partition to be disassembled, and the tool cross beam 21 is connected between the adjacent tool upright posts 19; set up totally four hoisting points in anterior shield and tail shield department, use and disassemble the frock and weld in the bottom of piecemeal on the well shield by four frock stands 19 and frock bracing 20 in the front and back, connect adjacent stand through frock crossbeam 21 and constitute the square frame who contains in well shield piecemeal, the hoisting point that sets up at anterior shield and shield tail is connected to the lug that sets up in the stand the latter half, thereby reduce the lug height of piecemeal, solve the problem that can't demolish the piecemeal because of required lug is too high, use chain block to carry out pretension on the centering shield afterwards, put down the upper portion piecemeal on well shield through chain block and demolish.
Dismantling the left split of the middle shield and the right split of the middle shield: respectively arranging four lifting points on the left side and the right side of the front shield and the tail shield, welding limit baffles 22 among the left sub-block of the middle shield, the right sub-block of the middle shield and the lower sub-block of the middle shield as shown in fig. 12, so as to prevent the left sub-block and the right sub-block of the middle shield from shaking in the subsequent dismantling process, performing and tensioning on the left sub-block and the right sub-block of the middle shield by using a chain block, and cutting off welding seams among the left sub-block of the middle shield, the right sub-block of the middle shield and other sub-blocks; in order to realize the dismantling of the left middle shield segment and the right middle shield segment among the small holes, two chain blocks on the left side are used for connecting the upper part of the left middle shield segment, two chain blocks on the right side are used for connecting the lower part of the left middle shield segment, the left middle shield segment is rotated to be horizontal by the coordinated motion and then is hoisted to a flat plate of the diesel locomotive to complete the dismantling of the left middle shield segment; and connecting the lower part of the right split of the middle shield by using the two chain blocks on the left side, connecting the upper part of the right split of the middle shield by using the two chain blocks on the right side, rotating the right split of the middle shield to be horizontal by using coordinated motion, and hoisting the right split of the middle shield to a flat plate of the internal combustion locomotive to finish the dismantling of the right split of the middle shield.
Removing the blocks on the anterior shield: dividing the upper shield block into a front part, a middle part and a rear part, wherein the middle part of the upper shield block is one half of the upper shield block, removing the middle part of the upper shield block firstly, and then removing the front part and the rear part of the upper shield block;
the specific process of dismantling the middle part of the upper partition of the anterior shield comprises the following steps: connecting the front part and the rear part of the upper front shield block with a left front shield block and a right front shield block through bolts, arranging hoisting points on the front part and the rear part of the upper front shield block, arranging a disassembling tool in the middle of the upper front shield block, tensioning the middle part of the upper front shield block by using a chain block, and lowering and disassembling the middle part of the upper front shield block by using the chain block;
the specific process of dismantling the front part and the rear part of the upper sub-block of the anterior shield comprises the following steps: and (3) arranging lifting points by using dismantling supports (or support structures with other door-shaped structures and higher than the front part and the rear part of the anterior shield upper block) higher than the front part and the rear part of the anterior shield upper block, and respectively completing dismantling of the remaining two side parts after pre-tightening the front part and the rear part of the anterior shield upper block.
Dismantling the anterior shield left block and the anterior shield right block: as shown in fig. 14 and 15, four lifting points are arranged by providing a dismantling support, which includes support uprights, support diagonal braces and support cross members, the disassembling support is supported by four support columns 23, the connecting parts of the support columns 23, the support cross beams 25 and the support limiting transverse plates 26 are higher than the left and right sub-blocks of the front shield, the support lifting lugs are arranged at the support columns 23 and are positioned near the highest points of the left and right sub-blocks of the front shield to be used as lifting points, the two support limiting transverse plates 26 are higher than the center of the shield body and are used for limiting against the tunnel wall at the front and rear positions of the front shield, welding limiting baffles 22 among the front shield left sub-block, the front shield right sub-block and the front shield lower sub-block, pre-tightening the front shield left sub-block and the front shield right sub-block through four bracket hoisting points by using a chain block, cutting off welding seams among the front shield left sub-block, the front shield right sub-block and other sub-blocks, and alternately dismantling the front shield left sub-block and the front shield right sub-block through the chain block; two chain blocks of the left support stand column 23 are connected with the upper part of the left split of the front shield, two chain blocks of the right support stand column are used for connecting the upper part of the right split of the front shield, the left split of the front shield is lifted to a flat plate of the diesel locomotive after being rotated anticlockwise by 90 degrees to be horizontal, the left split of the front shield is removed, and the right split of the front shield is disassembled in the same way.
Removing the lower middle shield blocks and the lower anterior shield blocks: lifting points are respectively arranged at the top of the shield tail and the pre-buried steel plates of the duct pieces, and the lower sub-blocks of the middle shield and the lower sub-blocks of the front end are disassembled at one time.
Example 2
As shown in fig. 16, the disassembly and transportation tool of the segment erector comprises two sets of fixing bases 27 which are symmetrically arranged, two telescopic oil cylinders 28 are arranged between the two sets of fixing bases 27, one end of each telescopic oil cylinder 28 is rotatably connected with one side of the fixing base 27, the other side of each telescopic oil cylinder 28 is rotatably connected with the other side of the fixing base 27, a support plate 29 is arranged on each fixing base 27, the support plates 29 are movably mounted on the fixing bases 27, the height of the disassembly and transportation tool in a segment erector tunnel can be adjusted by adjusting the relative position relationship between the support plates 29 and the fixing bases 27, and the width between the two sets of fixing bases 27 can be adjusted by adjusting the telescopic distance of the telescopic oil cylinders 28; the inboard top that backup pad 29 top was used for supporting segment erector 15, backup pad 29 and unable adjustment base 27's the outside is used for supporting segment erector 15's inside lateral wall, and assembly back segment erector 15 gesture is stable can not bump with the section of jurisdiction. The duct piece erector is disassembled and transported the frock and passes through unable adjustment base 27 sets up on the flatbed, when dismantling the machine in the hole, will disassemble duct piece erector 15 and duct piece erector and disassemble and transport the frock and fix together, then transport out of the hole through the flatbed. The fixed base 27 comprises a base 31 and a fixed plate 32, the fixed plate 32 is welded on the base 31, and the base 31 can increase the contact area between the segment erector transportation tool and the flat car, so that the stability of the whole structure in the transportation process is improved; two oil cylinder bases 33 are fixedly welded on each fixing plate 32, the telescopic oil cylinder 28 is rotatably connected with the oil cylinder bases 33 through a pin shaft 30, and the transverse width size of the tool is adjusted by adjusting the telescopic length of the telescopic oil cylinder 28. A plurality of mounting holes are formed in the support plate 29, the support plate 29 is movably mounted on the fixed base 27 through bolts in a matched manner with the mounting holes, and the support height of the tool can be changed by adjusting the bolt mounting holes of the support plate 29.
Example 3
As shown in fig. 17 to 19, the main drive carrier includes: the vehicle body mechanism is provided with a connecting plate 34, the connecting plate 34 is provided with two traction holes 35, and the two traction holes 35 are symmetrically arranged at the front end and the rear end of the connecting plate 34; the connecting plate 34 is provided with a plurality of cross beam steel frames 36 and main beam steel frames 37, so that the strength and stability of the vehicle body structure are guaranteed, the cross beam steel frames 36 and the main beam steel frames 37 are vertically welded, the cross beam steel frames 36 are connected with the main beam steel frames 37 and the connecting plate 34 through welding, the cross beam steel frames 36 are arranged in parallel, the main beam steel frames 37 are arranged in parallel, and the connecting plate 34, the cross beam steel frames 36 and the main beam steel frames 36 are arranged on the same horizontal plane; the bilateral symmetry welding of connecting plate 34 has a plurality of support steelframes 38, support steelframe 38 with it can promote to be provided with strengthening rib 39 between the connecting plate 34 support steelframe 38's bearing strength, every side the welding of the up end of supporting steelframe 38 has an I-steel track 40, I-steel track 40 install perpendicularly in support steelframe 38 is last, and the main drive 5 of demolising is placed perpendicularly in two in the accommodation region that parallel I-steel track 40 formed, this project organization is reasonable, and the security is high, and the good reliability is formed by steel structure component assembly welding simultaneously, simple structure, with low costs. The running mechanism is arranged below the vehicle body mechanism and comprises a plurality of wheels, axles 41, bearings 42 and bearing seats 43, in the embodiment, two axles 41 are arranged, the two axles 41 are arranged in parallel, the bearing seats 43 are welded and fixed on the lower end faces of the connecting plates 34, the wheels are arranged at two ends of the corresponding axles 41 through the bearings 42 and the bearing seats 43, the wheels are provided with front wheels 44 and rear wheels 45, the front wheels 44 and the rear wheels 45 can rotate independently, and the transport vehicle can move through the axles 41 and the wheels; the design facilitates the running of the transport vehicle, the running is stable, and the manufacturing cost is reduced. The main drive fixing mechanism is arranged above the vehicle body mechanism and comprises two groups of fixing supporting columns 46 and fixing baffles 47, the two groups of fixing baffles 46 are arranged, the fixing baffles 47 are vertically welded on the top surface of the connecting plate 34, two ends of each fixing supporting column 46 are connected with the end of the connecting plate 34 and the corresponding fixing baffle 46, the fixing supporting columns 46 can be used for supporting the fixing baffles 46, and accommodating areas formed between the two groups of fixing baffles 46 and between the two parallel I-shaped steel rails 40 are used for vertically placing the main drive 5; this design has increased the factor of safety when the transport vechicle traveles, makes main drive 5 place stably and fixed firm.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A construction method for disassembling a tunnel of a shield machine of a non-expanding excavation chamber is characterized by comprising the following steps:
the method comprises the following steps: stopping the shield tunneling machine after the shield tunneling machine tunnels to a specified position, grouting and reinforcing the rear part of the shield tail, fixing the tunnel face and the cutter head, and stably supporting the tunnel face;
step two: the belt conveyor, the secondary fan and the rear matched trailer are sequentially dismantled, and the belt conveyor, the secondary fan and the rear matched trailer are conveyed out of the tunnel;
step three: sequentially removing the supporting shoes, the fixed ring plates and the anti-torsion bolts of the propulsion oil cylinder, removing an oil pipe of the propulsion oil cylinder and a hydraulic pipeline of a propulsion system, and withdrawing the propulsion oil cylinder to the hoisting position of the segment crane for hoisting;
step four: dismantling the screw machine, and conveying the screw machine to a battery car for transferring to the outside of the tunnel;
step five: the working platform, the pipeline bracket and the large lifting lug of the segment erector are dismantled at one time and transported to a segment car to be transported out of the tunnel; fixing a joist of the segment erector with a segment car, and transporting the fixed joist to the outside of the tunnel;
step six: pre-tensioning the H frame, removing a connecting bolt of the H frame, placing the H frame on a transport vehicle and transporting the H frame to the outside of the tunnel;
step seven: pre-tensioning the man compartment, cutting off a man compartment fixing support, removing connecting bolts of the man compartment and the partition plate, transporting the man compartment to a plate trailer, and transporting the man compartment to the outside of the tunnel after fixing;
step eight: removing the torque limiter and the main driving motor shaft connecting bolt, pulling out the main driving motor, hoisting the main driving motor to the flat car and transporting the flat car to the outside of the tunnel; dismantling a main driving hydraulic pipeline, dismantling a main driving speed reducer, moving to an originating vertical shaft by using the battery car and hoisting to the ground; removing a connecting support of a main drive and a rotary joint, supporting and fixing a cutter head, removing a connecting bolt of the main drive and the cutter head, cutting off a partition plate in the central area of a front shield, and transporting the main drive to the outside of a tunnel through a main drive transport vehicle;
step nine: disassembling the cutter head into a cutter head middle block, a cutter head lower block, a cutter head left block, a cutter head right block and a cutter head upper block, and transporting the cutter head middle block, the cutter head lower block, the cutter head left block, the cutter head right block and the cutter head upper block to the outside of the tunnel;
step ten: and (4) disassembling the front shield and the middle shield, and conveying the disassembled shield body blocks to the outside of the tunnel through the diesel locomotive.
2. The method for disassembling the tunnel of the shield tunneling machine without the enlarging excavation chamber of claim 1, wherein in the first step, a hole is formed in the tunnel face, and the tunnel face and the cutter head are fixed by inserting round steel bars into the tunnel face and the cutter head.
3. The tunnel dismantling construction method of the non-expanding excavation chamber shield machine according to claim 1, characterized in that in the second step, when the belt conveyor is dismantled, the belt conveyor is dismantled after all the belts are recovered, then main parts of the belt conveyor are dismantled, and finally the continuous belt conveyor tunnel outer support is dismantled; when the secondary fan is dismantled, the secondary fan is cut off, and the lower part of the rear part of the cross beam at the secondary fan is conveyed out of the tunnel to the internal combustion locomotive; when the rear matched trailer is dismantled, the related hydraulic, fluid, electrical and other pipelines of the rear matched trailer are firstly dismantled in a protective way, the connecting pin shafts between the rear matched trailers are dismantled, and then the rear matched trailers are conveyed out of the tunnel through the diesel locomotive.
4. The method for disassembling the tunnel of the shield tunneling machine without the enlarged excavation chamber according to claim 1, wherein in the third step, the support shoes of the thrust cylinder are firstly disassembled, then the cylinder fixing ring plate and the anti-twist bolt are disassembled, the oil pipe of the thrust cylinder is disassembled, then the oil pipe of the thrust cylinder is plugged by a special plug to prevent pollution, the thrust system is closed, the hydraulic pipeline of the thrust system is disassembled, the main oil return pipe of the shield tunneling machine is plugged, and the normal operation of other systems except the thrust system of the shield tunneling machine is ensured; the segment erector is used for pulling out the propulsion oil cylinder to a proper position, the propulsion oil cylinder is fixed with the grasping head of the segment erector, the propulsion oil cylinder is rotated to the bottom by rotating the segment erector, and the propulsion oil cylinder is retracted to the hoisting position of the segment crane and hoisted out by using the segment feeder.
5. The method for disassembling the tunnel of the shield tunneling machine without the enlarged excavation chamber of claim 1, wherein in the fourth step, a chain block is arranged by embedding a steel plate in the formed tunnel segment as a hoisting point, and the chain block is connected and fixed to a front end lifting lug of a screw machine; arranging a lifting point and a chain block on the segment erector, and connecting and fixing the chain block on a spiral shaft at the front end of a spiral machine; the spiral machine is guided to the battery car through each chain block and then is conveyed to the outside of the tunnel.
6. The method for disassembling the tunnel of the shield tunneling machine without the enlarged excavation chamber of claim 5, wherein in the fifth step, the segment erector is rotated to make the gripping head of the segment erector directly above, and the working platform, the pipeline bracket and the hoisting point of the segment erector are disassembled by a chain block; laying a walking track of the diesel locomotive to the lower part of the segment erector, arranging a lifting lug at the top of the shield body to integrally move the segment erector upwards, welding and fixing a joist of the segment erector and a segment car, and then conveying the segment erector and the segment car outside a tunnel.
7. The method for disassembling the tunnel of the shield tunneling machine without the enlarging excavation chamber of claim 1, wherein in the sixth step, a hoisting point is provided at the shield tail, the pin hole of the shield hinge cylinder and the hoisting point of the shield tail are used, the H-rack is pretensioned by the chain block, the connecting bolt of the H-rack is removed, and the H-rack is placed on the transport vehicle by the chain block and transported to the outside of the tunnel.
8. The method for disassembling the tunnel of the shield tunneling machine of the non-expanding excavation chamber as claimed in claim 1, wherein in the seventh step, hoisting points are welded at the front and rear positions of the middle upper part of the man-made compartment respectively, one hoisting point is welded at the end of the man-made compartment door, the man-made compartment is pre-tensioned by a chain block, a fixing bracket of the man-made compartment is cut off, and a connecting bolt between the man-made compartment and the partition plate is removed; the method comprises the steps of arranging lifting points on the duct pieces, hanging chain blocks, assisting to transport the human cabin through the chain blocks, transporting the human cabin to the plate trailer through the alternating action of the chain blocks, and transporting the human cabin to the outside of a tunnel after fixing.
9. The tunnel dismantling construction method of the non-expanding excavation chamber shield machine according to claim 1, wherein in the eighth step, a transparent cover at the rear part of the main driving motor is opened, the torque limiter is dismantled, a connecting bolt of the main driving motor shaft is dismantled, the main driving motor is pulled out by using a hoist, and the hoist is hoisted to a flat car to pull out the tunnel; dismantling the main driving hydraulic pipeline, sealing the main driving hydraulic pipeline and the interface by using a plug and then wrapping; dismantling the main driving speed reducer and the speed reducer motor, moving to an initial vertical shaft by using the battery car, and hoisting to the ground; removing a main drive and rotary joint connecting support, supporting and fixing a cutter head, and removing a main drive and cutter head connecting bolt; cutting off a partition board in the central area of the anterior shield; and (4) pouring the main drive transport vehicle to a position below the main drive, and transporting the main drive to the center of the main drive transport vehicle in the tunnel direction through the translation oil cylinder for reinforcement and then transporting out of the hole.
10. The method for disassembling the tunnel of the shield tunneling machine without the enlarging chamber according to claim 1, wherein in the tenth step, the anterior shield is divided into an upper anterior shield segment, a left anterior shield segment, a right anterior shield segment and a lower anterior shield segment, and the middle shield is divided into an upper middle shield segment, a left middle shield segment, a right middle shield segment and a lower middle shield segment; firstly, cutting off oil cylinder partition plates of the front shield upper block and the middle shield upper block; pre-tensioning the upper split block of the middle shield, and lowering the upper split block of the middle shield through a chain block for dismantling; welding limit baffles among the middle shield left block, the middle shield right block and the middle shield lower block, tensioning the middle shield left block and the middle shield right block by using a chain block, and cutting off welding seams among the middle shield left block, the middle shield right block and other blocks; respectively rotating the middle shield left block and the middle shield right block to be horizontal and then hoisting the blocks to a flat plate of the diesel locomotive; dividing the upper shield block into a front part, a middle part and a rear part, wherein the middle part of the upper shield block is one half of the upper shield block, and removing the middle part of the upper shield block and then the front part and the rear part of the upper shield block by using the front part and the rear part of the upper shield block to set lifting points; pre-tightening the front shield left block and the front shield right block, cutting off welding seams among the front shield left block, the front shield right block and other blocks, rotating the front shield left block and the front shield right block to be horizontal through a chain block, and then hoisting the front shield left block and the front shield right block to a flat plate of the internal combustion locomotive; respectively at shield tail top and the pre-buried steel sheet setting hoisting point of section of jurisdiction, divide the piece under well shield and divide the piece under the front end to disassemble.
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| CN116495421A (en) * | 2023-06-26 | 2023-07-28 | 中建交通建设集团有限公司 | Screw conveyor disassembling and transporting device and application method thereof |
| CN117552794A (en) * | 2024-01-10 | 2024-02-13 | 中建交通建设集团有限公司 | Assembled type shell-discarding and disassembly shield machine man-made brake dismantling device and construction method |
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| CN117552794A (en) * | 2024-01-10 | 2024-02-13 | 中建交通建设集团有限公司 | Assembled type shell-discarding and disassembly shield machine man-made brake dismantling device and construction method |
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