Double-shield TBM membrane belt inflation and grout-stopping concrete backfilling construction device and method

Abstract

The application discloses a double-shield TBM membrane belt inflatable slurry-stopping concrete backfill construction device and method, and belongs to the technical field of double-shield TBM construction, and the technical scheme is characterized by the double-shield TBM membrane belt inflatable slurry-stopping concrete backfill construction device, which comprises a slurry-stopping membrane belt, the slurry-stopping membrane belt is connected with slurry-stopping pipe segments, the slurry-stopping pipe segments are assembled to form a slurry-stopping ring, the slurry-stopping membrane belt is inflated and assembled to form a membrane belt ring, the slurry-stopping pipe segments are connected with intermediate pipe segments, the intermediate pipe segments are assembled to form an intermediate ring, the intermediate ring is arranged between every two adjacent slurry-stopping rings, the adjacent two membrane belt rings, the intermediate ring, the slurry-stopping ring and surrounding rock jointly form a closed filling space, the filling space is filled with self-compacting concrete, a grouting hole, which is in communication with the filling space, is formed in the intermediate pipe segment, the slurry-stopping pipe segments are connected with a reinforcing device for increasing the firmness of the self-compacting concrete and the slurry-stopping pipe segments, and the reinforcing device is connected with the slurry-stopping membrane belt, so that the backfill compactness is improved and the construction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of double-shield TBM construction, in particular to a double-shield TBM membrane belt inflatable grout-stopping concrete backfill construction device and method. BACKGROUND

[0002] At present, the double-shield TBM integrates excavation, support and slag discharge, is a factory-like pipeline tunnel construction equipment integrating machine, electricity, liquid, light and gas, has the advantages of fast tunneling speed, environmental protection and high comprehensive benefits, and can realize the construction of a complex geographical and topographical deep-buried long tunnel which cannot be realized by the traditional drilling and blasting method, and is rapidly growing in application in tunnel engineering of railways, hydropower, transportation, mines and municipal administration in China.

[0003] In the related art, in the traditional tunneling process of a tunnel project, a pea gravel backfill process is often used. The double-shield TBM excavates first, and then uses segments to establish a support structure, the segments are provided with backfill holes, pea gravel is backfilled into the gap between the tunnel and the surrounding rock through the backfill holes, and cement slurry or mortar is backfilled into the gap between the pea gravel, so as to fix the support structure and the rock.

[0004] For the related art in the above, the pea gravel backfill process has the problems of difficult guarantee of backfill density and low construction efficiency. SUMMARY

[0005] In order to improve the backfill density and the construction efficiency, the application provides a double-shield TBM membrane belt inflatable grout-stopping concrete backfill construction device and method.

[0006] The double-shield TBM membrane belt inflatable grout-stopping concrete backfill construction device provided by the application adopts the following technical scheme:

[0007] The double-shield TBM membrane belt inflatable grout-stopping concrete backfill construction device comprises a grout-stopping membrane belt, the grout-stopping membrane belt is connected with grout-stopping segments, the grout-stopping segments are assembled to form a grout-stopping ring, the grout-stopping membrane belt is inflated and assembled to form a membrane belt ring, the grout-stopping segments are connected with intermediate segments, the intermediate segments are assembled to form an intermediate ring, the intermediate ring is arranged between every two adjacent grout-stopping rings, adjacent two membrane belt rings, the intermediate ring and the grout-stopping ring and surrounding rock jointly form a closed filling space, the filling space is filled with self-compacting concrete, the intermediate segments are provided with grouting holes in communication with the filling space, the grout-stopping segments are connected with a reinforcing device for increasing the firmness of the self-compacting concrete and the grout-stopping segments, and the reinforcing device is connected with the grout-stopping membrane belt.

[0008] By adopting the technical scheme, the TBM segment crane assembles the middle segments into a middle ring and the grouting stop segment into a grouting stop ring, the middle ring is arranged in the grouting stop ring, the membrane belt is inflated to form a membrane belt ring, the grouting stop membrane belt deforms in the inflation process and drives the reinforcing device to move, then the self-compacting concrete is poured into the filling space through the grouting hole until the filling space is filled, the reinforcing device is embedded in the self-compacting concrete after the self-compacting concrete gradually has strength, the firmness between the grouting stop segment and the self-compacting concrete is increased, the self-compacting concrete can be compacted without vibration in the backfilling process, the actual compactness usually reaches more than 99%, the backfilling compactness is improved, the process is simple, and the construction efficiency is improved.

[0009] Preferably, the grouting stop segment is provided with a placing groove on the side wall close to the surrounding rock, the grouting stop membrane belt is arranged in the placing groove and is bonded to the grouting stop segment, the grouting stop segment is provided with an inflation hole in communication with the placing groove, and the grouting stop membrane belt is provided with a duck-billed bypass air inlet hole aligned with the inflation hole.

[0010] By adopting the technical scheme, the placing groove is used for placing the grouting stop membrane belt, the abrasion of the grouting stop membrane belt in the transportation process is reduced, and the possibility of damage of the grouting stop membrane belt is reduced. The duck-billed bypass air inlet hole is aligned with the inflation hole to facilitate inflation of the grouting stop membrane belt.

[0011] Preferably, the grouting stop membrane belt is connected with an inflation pipeline, the inflation pipeline comprises a hard pipe penetrating through the inflation hole, a tee joint in communication with the hard pipe, and a hose in communication with the tee joint, the hard pipe is in communication with the inside of the grouting stop membrane belt through the duck-billed bypass air inlet hole, the tee joint is located on the side of the grouting stop segment away from the surrounding rock, an air valve is arranged between the hard pipe and the tee joint, the tee joints connected with adjacent grouting stop membrane belts are connected into an integrated whole through the hose, the hose is communicated with an air compressor, and a pressure regulating valve is arranged between the air compressor and the hose.

[0012] By adopting the technical scheme, when the membrane is needed to be inflated, the inflation pipeline is installed first, the hard pipe is inserted into the inflation hole first, one end of the hard pipe is communicated with the inside of the membrane through the bypass air inlet hole beside the duck bill, then the air valve is installed at the other end of the hard pipe, the air valve is convenient for the worker to control whether each membrane is inflated or not, then the three-way valve is communicated with the hard pipe, the other two sides of the three-way valve are connected with the hoses, the hoses are communicated between the three-ways of the adjacent membranes, and the hoses connect multiple three-ways to form an integrated body. The air compressor is started, the pressure regulating valve is adjusted to the appropriate pressure value, then the air valves are opened, the air compressor can inflate multiple membranes at the same time, or the inflation of any one membrane can be controlled by controlling the opening and closing of the air valves; when the membrane is inflated, the membrane gradually approaches the surrounding rock, and after the gas in the membrane is filled, the membrane abuts against the surrounding rock, the air valves are closed, the air compressor is closed, and the membrane always maintains the state of being filled with gas, and a sealed filling space is formed between the adjacent two membrane rings, the middle ring, the membrane ring and the surrounding rock.

[0013] Preferably, the reinforcing device is provided with multiple reinforcing devices, and the multiple reinforcing devices are symmetrically arranged on both sides of the membrane.

[0014] By adopting the technical scheme, multiple reinforcing devices further increase the firmness between the membrane and the self-compacting concrete and increase the stability of the membrane.

[0015] Preferably, the reinforcing device comprises a bottom plate connected with the membrane, a limiting rod, a reinforcing rod, and a synchronous assembly for keeping the limiting rod and the reinforcing rod in synchronous movement, the bottom plate is provided with a first movable slot, a movable cavity communicated with the first movable slot, and a second movable slot communicated with the movable cavity, one end of the limiting rod is inserted into the first movable slot and rotationally connected with the bottom plate, the other end of the limiting rod abuts against the membrane, the reinforcing rod is placed in the second movable slot and rotationally connected with the bottom plate, and the synchronous assembly is located in the movable cavity and used for driving the reinforcing rod to rotate out of the bottom plate.

[0016] By adopting the technical scheme, in the process of inflating the membrane, the membrane expands, the limiting rod rotates in the process of expansion of the membrane, the limiting rod drives the synchronous assembly to move, the synchronous assembly drives the reinforcing rod to move, and the reinforcing rod rotates out of the bottom plate until the reinforcing rod is embedded in the self-compacting concrete after the self-compacting concrete is poured, the connection effect of the self-compacting concrete and the membrane is reinforced, and the stability of the membrane is increased. When the reinforcing rod is located in the second movable slot, the membrane is convenient for transportation.

[0017] Preferably, one end of the limiting rod close to the membrane is connected with a limiting block, the surface of the limiting block is provided in a spherical shape, and the limiting block abuts against the membrane.

[0018] By adopting the technical scheme, the limit block arranged in the spherical surface reduces the abrasion of the limit block to the slurry stopping membrane belt, and reduces the possibility of damage of the slurry stopping membrane belt.

[0019] Preferably, the synchronous assembly comprises an action rod connected with the limit rod, a connecting rod connected with the reinforcing rod, and a sliding block slidingly connected with the connecting rod, the length direction of the action rod is perpendicular to the length direction of the limit rod, the action rod rotates coaxially with the limit rod, the axis of the connecting rod coincides with the axis of the reinforcing rod, the connecting rod rotates coaxially with the reinforcing rod, and the action rod is rotationally connected with the sliding block.

[0020] By adopting the technical scheme, when the limit rod rotates, the limit rod drives the action rod to rotate, the action rod drives the sliding block to move, the sliding block slides in the sliding groove while driving the connecting rod to rotate, and the connecting rod drives the reinforcing rod to extend out of the second movable groove.

[0021] Preferably, the slurry stopping membrane belt is made of wear-resistant material.

[0022] By adopting the technical scheme, since the slurry stopping membrane belt will be scratched during installation, and will slide against the limit block during inflation until abutting against the surrounding rock, and the surrounding rock also has a sharp area, the slurry stopping membrane belt made of wear-resistant material has a long service life.

[0023] The double-shield TBM membrane belt inflation slurry stopping concrete backfill construction method provided by the application adopts the following technical scheme:

[0024] The double-shield TBM membrane belt inflation slurry stopping concrete backfill construction method comprises the following steps:

[0025] S1, construction preparation: using strong glue to bond the slurry stopping membrane belt into the placing groove of the slurry stopping pipe piece, fixing a plurality of reinforcing devices on both sides of the placing groove, and transporting the slurry stopping pipe piece and the intermediate pipe piece in a regular manner;

[0026] S2, establishing a support structure: while the double-shield TBM is excavated, the TBM pipe piece crane sequentially splices the intermediate pipe piece and the slurry stopping pipe piece to form a support structure, and one slurry stopping ring is inserted after every five intermediate rings are installed;

[0027] S3, installing the inflation pipeline: the hard pipe connected with the bypass air inlet hole beside the duckbill of each slurry stopping membrane belt is sequentially connected with the air valve and the tee joint after extending out of the inflation hole, the soft pipes are connected on both sides of the tee joint, and the tee joints of adjacent slurry stopping membrane belts are connected by the soft pipes to form an integrated inflation pipeline;

[0028] S4, inflate the membrane belt: after the stop slurry pipe piece is pushed out of the tail shield, the air compressor is connected with the inflation pipeline, a pressure regulating valve is connected between the air compressor and the inflation pipeline, the pressure regulating valve is adjusted, the air compressor is started, the stop slurry membrane belt is inflated, after inflation is completed, the air valves are closed, the air compressor is turned off, the stop slurry membrane belt fills the gap between the stop slurry pipe piece and the surrounding rock;

[0029] S5, start the reinforcing device: the stop slurry membrane belt gradually expands, the limiting rod rotates, the limiting rod drives the action rod to rotate, the action rod drives the connecting rod to move through the sliding block, the connecting rod drives the reinforcing rod to rotate, and one end of the reinforcing rod is turned out of the second movable groove;

[0030] S6, self-compacting concrete backfilling: connect the self-compacting concrete pump pipeline with the grouting hole, fill the self-compacting concrete into the filling space formed by the adjacent two membrane belt rings, the intermediate ring, the stop slurry ring and the surrounding rock, until it is filled, so that the reinforcing rod is embedded in the self-compacting concrete, and the firmness between the stop slurry pipe piece and the self-compacting concrete is increased;

[0031] S7, deflate the stop slurry membrane belt: after the self-compacting concrete reaches sufficient strength, open the air valve, use the air extractor to extract the air in the stop slurry membrane belt until the stop slurry membrane belt is deflated, immediately close the air valve, keep the stop slurry membrane belt in a deflated state, and remove the inflation pipeline elements except the air inlet valve;

[0032] S8, backfilling construction of the next interval: repeat steps S3-S7 to backfill the self-compacting concrete in the next backfilling interval, so that the self-compacting concrete fills the new filling space and the cavity formed after the air is extracted from the last ring stop slurry membrane belt.

[0033] By adopting the above technical scheme, when the pipe piece is manufactured, the intermediate pipe piece and the stop slurry pipe piece are needed to be manufactured, the stop slurry membrane belt is bonded with the stop slurry pipe piece, the reinforcing device is fixed on the stop slurry pipe piece, and the reinforcing device is arranged on both sides of the stop slurry membrane belt, the stop slurry pipe piece and the intermediate pipe piece are transported to a suitable position.

[0034] While the double shield TBM is excavating, the TBM pipe piece crane splices the intermediate pipe piece into an intermediate ring and splices the stop slurry pipe piece into a stop slurry ring, five intermediate rings are arranged between every two adjacent stop slurry rings, then the inflation pipeline is installed for the stop slurry membrane belt, the stop slurry membrane belt, the hard pipe, the air valve and the tee joint are sequentially connected, the tee joints between the adjacent stop slurry membrane belts are connected through the soft pipe, the air compressor is connected with the soft pipe, and a pressure valve is connected between the soft pipe and the air compressor, which is used to adjust the air pressure value of the air compressor entering the soft pipe, the air compressor is started, the air valve is opened, the stop slurry membrane belt is inflated, after inflation is completed, a membrane belt ring is formed, the stop slurry membrane belt enters the air preservation state, and the adjacent two membrane belt rings, the intermediate ring, the stop slurry ring and the surrounding rock jointly form a sealed filling space.

[0035] The bulging process of the membrane strip makes the limiting rod rotate, the limiting rod drives the action rod to rotate, the action rod drives the sliding block to move, the sliding block drives the connecting rod to rotate, the connecting rod drives the reinforcing rod to rotate, one end of the reinforcing rod rotates out of the second movable groove, the membrane strip enters the air retaining state, and the reinforcing rod remains to extend out of the bottom plate; then, through the grouting hole, the self-compacting concrete is poured into the filling space until it is filled, and the self-compacting concrete is dried and has supporting force, so that the reinforcing rod is embedded in the self-compacting concrete, the firmness between the membrane strip and the self-compacting concrete is increased, the stability of the membrane strip is increased, and then the stability of the supporting structure is increased.

[0036] After the self-compacting concrete has sufficient strength, the air valve is opened, the air compressor is removed, the air pump is installed, the air in the membrane strip is extracted by the air extractor until the membrane strip is deflated, the air valve is immediately closed to keep the membrane strip in a deflated state, the tee, the hose and the air extractor are removed, and then the inflation of the next membrane strip and the filling of the new filling space with the self-compacting concrete are performed, and the cavity of the previous membrane strip is filled.

[0037] Preferably, in step S4, when the air pressure of the membrane strip is lower than the air pressure setting value thereof, the air compressor is started and the air valve is opened until the air pressure of the membrane strip reaches the air pressure setting value, and then the air compressor is stopped and the air valve is closed.

[0038] By adopting the technical scheme, when the air pressure of the membrane strip is lower than the air pressure setting value, due to the irregularity of the inner wall of the surrounding rock, the tightness of the membrane strip and the surrounding rock may not be enough, and then the self-compacting concrete in the backfilling space may overflow, so the greater the tightness of the membrane strip and the surrounding rock, the better the grouting effect of the membrane strip.

[0039] In summary, the present application has the following advantages:

[0040] 1. The self-compacting concrete is used to backfill the intermediate ring, the grouting ring and the surrounding rock to form a backfilling space, the self-compacting concrete can be compacted without vibration during the backfilling process, the actual compactness usually reaches more than 99%, and the backfilling compactness is improved;

[0041] 2. The grouting ring and the membrane strip ring are adopted to divide the backfilling space into multiple filling spaces along the length direction of the tunnel, the self-compacting concrete material is poured into the filling space immediately after the formation of the filling space to provide rapid and timely support for the surrounding rock, and the process is simple and the construction efficiency is improved.

[0042] 3. The reinforcing device is added to embed the reinforcing rod in the self-compacting concrete, increase the firmness between the self-compacting concrete and the membrane strip, and then increase the stability of the supporting structure. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1is the overall structure schematic diagram of the double shield TBM membrane belt inflatable grouting concrete backfill construction device in embodiment 1.

[0044] Figure 2 is the structure schematic diagram of the intermediate ring and the grouting ring in embodiment 1.

[0045] Figure 3 is the structure schematic diagram of the grouting ring in embodiment 1.

[0046] Figure 4 is the structure schematic diagram of the grouting ring and the grouting membrane belt in embodiment 1.

[0047] Figure 5 is the structure schematic diagram of the grouting ring and the grouting membrane belt in embodiment 1. Figure 2 is the enlarged structure schematic diagram of part A in embodiment 1.

[0048] Figure 6 is the sectional view of the intermediate ring and the grouting ring in embodiment 1.

[0049] Figure 7 is the overall structure schematic diagram of the reinforcing device in embodiment 1.

[0050] Figure 8 is the state diagram of the reinforcing rod in the second movable slot in embodiment 1.

[0051] Figure 9 is the state diagram of the reinforcing rod extending out of the second movable slot in embodiment 1.

[0052] Figure 10 is the flow chart in embodiment 2.

[0053] Explanation of reference signs:

[0054] 1, surrounding rock; 2, intermediate ring; 21, intermediate segment; 211, grouting hole; 3, grouting ring; 31, grouting segment; 311, inflatable hole; 312, placing slot; 4, grouting membrane belt; 5, inflatable pipeline; 6, air compressor; 61, pressure regulating valve; 7, reinforcing device; 71, bottom plate; 711, first movable slot; 712, movable cavity; 713, second movable slot; 72, limiting rod; 721, limiting block; 73, reinforcing rod; 74, synchronous assembly; 741, acting rod; 742, connecting rod; 7421, sliding groove; 743, sliding block; 8, self-compacting concrete. DETAILED DESCRIPTION

[0055] The application will be further described in detail below with reference to the drawings.

[0056] Embodiment 1

[0057] The double shield TBM membrane belt inflatable grouting concrete backfill construction device, with reference to Figure 1 and Figure 2, including the stop membrane belt 4, the stop membrane belt 4 is connected to the stop pipe sheet 31, the stop pipe sheet 31 is spliced to form the stop ring 3, the stop pipe sheet 31 is connected to the intermediate pipe sheet 21, the intermediate pipe sheet 21 is spliced to form the intermediate ring 2, the intermediate ring 2 is connected with the stop ring 3, one stop ring 3 is arranged after every five intermediate rings 2, the stop membrane belt 4 forms a membrane belt ring after being inflated, and the adjacent two membrane belt rings, the intermediate ring 2, the stop ring 3 and the surrounding rock 1 form a sealed filling space, and the filling space is filled with self-compacting concrete 8. The stop membrane belt 4 is connected with the inflation pipeline 5, the inflation pipeline 5 is used for inflating the plurality of stop membrane belts 4 in the membrane belt ring at the same time, the inflation pipeline 5 is connected with the air compressor 6, and the air compressor 6 is used for inflating the inflation pipeline 5.

[0058] With reference to Figure 3 , the stop pipe sheet 31 is provided with a placing groove 312 on the side wall close to the surrounding rock 1, the length of the placing groove 312 is the same as the arc length of the stop pipe sheet 31, and the stop membrane belt 4 is arranged in the placing groove 312 and is bonded with the stop pipe sheet 31. The placing groove 312 is used for placing the stop membrane belt 4, reducing the abrasion of the stop membrane belt 4 in the transportation process, and further reducing the possibility of damage of the stop membrane belt 4.

[0059] With reference to Figure 2 and Figure 3 , the stop pipe sheet 31 is provided with an inflation hole 311, the stop membrane belt 4 is communicated with a duckbill bypass air inlet hole, the duckbill bypass air inlet hole is arranged in alignment with the inflation hole 311, the stop membrane belt 4 is made of an anti-abrasion material, the anti-abrasion material can be rubber, polyamide fiber or the like, and the stop membrane belt 4 has deformability.

[0060] The stop membrane belt 4 with deformability can adapt to the outer diameters of the surrounding rock 1 and the stop pipe sheet 31 after being inflated, and has a good stop effect. Since the stop membrane belt 4 will be scratched during installation, and then will slide against the limiting block 721 during inflation until abutting against the surrounding rock 1, and the surrounding rock 1 also has a sharp area, the stop membrane belt 4 made of the wear-resistant material has a long service life.

[0061] With reference to Figure 4 , the stop membrane belt 4 is connected with the inflation pipeline 5, the inflation pipeline 5 includes a hard pipe, a tee joint and a hose, one end of the hard pipe extends into the inflation pipe and communicates with the duckbill bypass air inlet hole, and the other end is provided with an air valve, the tee joint communicates with the air valve, and the hose is located between the tee joints of the adjacent stop membrane belts 4 and communicates with the tee joint. One hose is communicated with the air compressor 6, and a pressure regulating valve 61 is arranged between the hose and the air compressor 6. The air compressor 6 can inflate a plurality of stop membrane belts 4 at the same time.

[0062] With reference to Figure 5 and Figure 6The reinforcing device 7 is provided with a plurality of reinforcing devices 7, the plurality of reinforcing devices 7 are symmetrically arranged on both sides of the membrane 4, and the reinforcing device 7 on one side of the membrane 4 is arranged along the outer peripheral wall of the ring 3 at equal intervals. The plurality of reinforcing devices 7 further increase the firmness between the pipe sheet 31 and the self-compacting concrete 8, and increase the stability of the pipe sheet 31.

[0063] With reference to Figure 7 The reinforcing device 7 comprises a bottom plate 71, a limiting rod 72, a reinforcing rod 73 and a synchronous assembly 74. The bottom plate 71 is fixedly connected to the pipe sheet 31 close to the side wall of the surrounding rock 1. The bottom plate 71 is provided with a first movable slot 711, a movable cavity 712 and a second movable slot 713. The movable cavity 712 is in communication with the first movable slot 711 and the second movable slot 713.

[0064] With reference to Figure 5 And Figure 8 The first movable slot 711 is matched with the limiting rod 72. One end of the limiting rod 72 extends into the first movable slot 711 and is rotatably connected to the bottom plate 71. The other end of the limiting rod 72 is fixedly connected to a limiting block 721. The surface of the limiting block 721 is provided with a spherical surface, and the limiting block 721 abuts against the membrane 4. The second movable slot 713 is matched with the reinforcing rod 73. The reinforcing rod 73 is arranged in the second movable slot 713 and is rotatably connected to the pipe sheet 31.

[0065] With reference to Figure 7 The synchronous assembly 74 comprises an acting rod 741, a connecting rod 742 and a sliding block 743. The acting rod 741 is fixedly connected to the limiting rod 72. The length direction of the acting rod 741 is perpendicular to the length direction of the limiting rod 72, and the acting rod 741 and the limiting rod 72 are coaxially rotatable. The connecting rod 742 is fixedly connected to the reinforcing rod 73. The axis of the connecting rod 742 coincides with the axis of the reinforcing rod 73, and the connecting rod 742 and the reinforcing rod 73 are coaxially rotatable.

[0066] With reference to Figure 7 And Figure 9 The connecting rod 742 is provided with a sliding groove 7421. The sliding block 743 penetrates through the sliding groove 7421 and is slidably connected to the connecting rod 742. One end of the acting rod 741 away from the limiting rod 72 is rotatably connected to the sliding block 743.

[0067] In the process of inflating the sealing membrane belt 4, the sealing membrane belt 4 is inflated, and the limiting rod 72 is rotated in the process of the inflation of the sealing membrane belt 4, the limiting rod 72 drives the action rod 741 to rotate, the action rod 741 drives the sliding block 743 to move, the sliding block 743 slides in the sliding groove 7421 and drives the connecting rod 742 to rotate, the connecting rod 742 drives the reinforcing rod 73 to extend out of the second movable groove 713, and after the self-compacting concrete 8 is poured, the reinforcing rod 73 is embedded in the self-compacting concrete 8, the connection effect of the self-compacting concrete 8 and the sealing pipe piece 31 is reinforced, and the stability of the sealing pipe piece 31 is increased.

[0068] With reference to Figure 6 The intermediate pipe piece 21 is provided with a grouting hole 211, and the self-compacting concrete 8 enters the filling space through the grouting hole 211. A self-compacting concrete 8 check valve is arranged in the grouting hole 211.

[0069] The use principle of the application is as follows: while the double shield TBM is excavating, the TBM pipe piece crane splices the intermediate pipe pieces 21 into the intermediate ring 2 and splices the sealing pipe pieces 31 into the sealing ring 3, five intermediate rings 2 are arranged between every two adjacent sealing rings 3, then the sealing membrane belt 4 is installed with the inflation pipeline 5, the sealing membrane belt 4, the hard pipe, the air valve and the tee joint are sequentially communicated, the tees between adjacent sealing membrane belts 4 are communicated through the hose, the air compressor 6 is communicated with the hose, a pressure valve is connected between the hose and the air compressor 6 and is used for adjusting the air pressure value of the air compressor 6 entering the hose, the air compressor 6 is started, the air valve is opened, the sealing membrane belt 4 is inflated, after the inflation is completed, the membrane belt ring is formed, the sealing membrane belt 4 enters the air preservation state, and the adjacent two membrane belt rings, the intermediate ring 2, the sealing ring 3 and the surrounding rock 1 jointly form a sealed filling space.

[0070] In the process of the inflation of the sealing membrane belt 4, the limiting rod 72 is rotated, the limiting rod 72 drives the action rod 741 to rotate, the action rod 741 drives the sliding block 743 to move, the sliding block 743 drives the connecting rod 742 to rotate, the connecting rod 742 drives the reinforcing rod 73 to rotate, one end of the reinforcing rod 73 rotates out of the second movable groove 713, the limiting rod 72 is in a vertical state, the reinforcing rod 73 is also in a vertical state, the sealing membrane belt 4 enters the air preservation state, and the reinforcing rod 73 remains to extend out of the bottom plate 71; the self-compacting concrete 8 is poured into the filling space through the grouting hole 211 until the filling space is filled, the self-compacting concrete 8 is dried and has a supporting force, the reinforcing rod 73 is embedded in the self-compacting concrete 8, the firmness between the sealing pipe piece 31 and the self-compacting concrete 8 is increased, the stability of the sealing pipe piece 31 is increased, and then the stability of the supporting structure is increased.

[0071] After the self-compacting concrete 8 has sufficient strength, open the air valve, remove the air compressor 6, install the air extraction pump, and use the air extraction pump to extract the air from the grout-stopping membrane 4 until the grout-stopping membrane 4 is deflated. Immediately close the air valve, keep the grout-stopping membrane 4 in a deflated state, remove the tee, hose and air extraction pump, and then inflate the next grout-stopping membrane 4 and fill the new filling space with self-compacting concrete 8, and fill the cavity of the previous grout-stopping membrane 4.

[0072] Example 2

[0073] Construction method for double-shield TBM membrane strip inflatable grout-stopping concrete backfilling, refer to Figure 10 This includes the following steps:

[0074] S1. Construction preparation: Use strong adhesive to bond the grout-stopping membrane 4 to the placement groove 312 of the grout-stopping pipe segment 31, and then fix multiple reinforcement devices 7 on both sides of the placement groove 312 respectively. Transport the grout-stopping pipe segment 31 and the intermediate pipe segment 21 in a regular manner.

[0075] S2. Establishing a support structure: While the double-shield TBM is excavating, the TBM segment crane will sequentially splice the intermediate segments 21 and the grout-stopping segments 31 to form a support structure. After every five intermediate rings 2 are installed, a grout-stopping ring 3 will be inserted.

[0076] S3. Install the inflation pipeline 5: The duckbill bypass air inlet of each section of the slurry stop membrane 4 is connected to a rigid pipe. After the rigid pipe extends out from the inflation hole 311, it is connected to the air valve and the tee in sequence. Both sides of the tee are connected to the hose. The tees of adjacent slurry stop membrane 4 are connected by the hose to form an integrated inflation pipeline 5.

[0077] S4. Inflate the grout-stopping membrane 4: After the grout-stopping segment 31 is pushed out of the tail shield, connect the air compressor 6 to the air-inflating pipeline 5, and connect the pressure regulating valve 61 between the air compressor 6 and the air-inflating pipeline 5. Adjust the pressure regulating valve 61, start the air compressor 6, and inflate the grout-stopping membrane 4. After inflation, close all air valves and turn off the air compressor 6. The grout-stopping membrane 4 fills the gap between the grout-stopping segment 31 and the surrounding rock 1.

[0078] S5. Start the reinforcement device 7: During the gradual expansion of the grout membrane belt 4, the limiting rod 72 rotates, the limiting rod 72 drives the action rod 741 to rotate, the action rod 741 drives the connecting rod 742 to move through the slider 743, and the connecting rod 742 drives the reinforcement rod 73 to rotate, so that one end of the reinforcement rod 73 rotates out of the second movable groove 713.

[0079] S6. Backfilling of self-compacting concrete 8: Connect the pump pipeline of self-compacting concrete 8 to the grouting hole 211, and fill the self-compacting concrete 8 into the filling space formed by the two adjacent membrane rings, the intermediate ring 2, the grout stop ring 3 and the surrounding rock 1 until it is full, so that the reinforcing rod 73 is embedded in the self-compacting concrete 8, increasing the firmness between the grout stop tube 31 and the self-compacting concrete 8.

[0080] S7, deflating the membrane 4: after the self-compacting concrete 8 reaches sufficient strength, open the air valve, and use the air pump to deflate the membrane 4 until it is dry, immediately close the air valve, and keep the membrane 4 dry, and remove the air pipe 5 elements except the air valve;

[0081] S8, backfilling the next interval: repeat steps S3-S7 to backfill the self-compacting concrete 8 in the next interval, so that the self-compacting concrete 8 fills the new filling space and the cavity formed after deflating the membrane 4 in the previous interval.

[0082] Further, in step S4, when the air pressure of the membrane 4 is lower than the air pressure set value, start the air compressor 6 and open the air valve until the air pressure of the membrane 4 reaches the air pressure set value, and then close the air compressor 6 and the air valve.

[0083] The embodiments of the specific implementation are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. Double shield TBM membrane belt inflatable grout stopping concrete backfill construction device, characterized in that: The utility model provides a kind of self-compacting concrete filling device, including stop membrane belt (4), stop membrane belt (4) is connected with stop membrane pipe piece (31), stop membrane pipe piece (31) is assembled to form stop membrane ring (3), stop membrane belt (4) is assembled to form membrane belt ring after inflation, stop membrane pipe piece (31) is connected with intermediate pipe piece (21), intermediate pipe piece (21) is assembled to form intermediate ring (2), every two adjacent stop membrane ring (3) between is provided with the intermediate ring (2), adjacent two membrane belt ring, intermediate ring (2), stop membrane ring (3) and surrounding rock (1) jointly enclose a closed filling space, the filling space is filled with self-compacting concrete (8), the intermediate pipe piece (21) is provided with injection hole (211) that communicates with the filling space, stop membrane pipe piece (31) is connected with reinforcing device (7) that increases the self-compacting concrete (8) and the firmness of stop membrane pipe piece (31), reinforcing device (7) is connected with stop membrane belt (4); The reinforcing device (7) includes a bottom plate (71) connected to the stop membrane pipe piece (31), a limiting rod (72), a reinforcing rod (73), and a synchronization assembly (74) for keeping the reinforcing rod (73) and the limiting rod (72) in synchronous motion. The bottom plate (71) is provided with a first movable slot (711), a movable cavity (712) communicating with the first movable slot (711), and a second movable slot (713) communicating with the movable cavity (712). One end of the limiting rod (72) extends into the first movable slot (711) and is rotationally connected to the bottom plate (71). The other end of the limiting rod (72) abuts against the stop membrane belt (4). The reinforcing rod (73) is placed in the second movable slot (713) and is rotationally connected to the bottom plate (71). The synchronization assembly (74) is located in the movable cavity (712) and is used to drive the reinforcing rod (73) to rotate out of the bottom plate (71).

2. The double shield TBM membrane strip inflatable dam concrete backfill construction device according to claim 1, characterized in that: The stop membrane pipe piece (31) is provided with a placement slot (312) on the side wall close to the surrounding rock (1). The stop membrane belt (4) is located in the placement slot (312) and is bonded to the stop membrane pipe piece (31). The stop membrane pipe piece (31) is provided with an inflation hole (311) communicating with the placement slot (312). The stop membrane belt (4) is provided with a duckbill bypass air inlet hole aligned with the inflation hole (311).

3. The double shield TBM membrane strip inflatable dam concrete backfill construction device according to claim 2, characterized in that: The stop membrane belt (4) is connected with an inflation pipeline (5). The inflation pipeline (5) includes a hard pipe penetrating through the inflation hole (311), a tee communicating with the hard pipe, and a soft pipe communicating with the tee. The hard pipe communicates with the inside of the stop membrane belt (4) through the duckbill bypass air inlet hole. The tee is located on the side of the stop membrane pipe piece (31) away from the surrounding rock (1). An air valve is installed between the hard pipe and the tee. The tees connected by adjacent stop membrane belts (4) are connected to form an integral body through the soft pipe. The soft pipe communicates with an air compressor (6). A pressure regulating valve (61) is installed between the air compressor (6) and the soft pipe.

4. The double shield TBM membrane strip inflatable concrete backfill construction device according to any one of claims 1-3, characterized in that: The reinforcing device (7) is provided with a plurality of reinforcing devices (7) which are symmetrically arranged on both sides of the grout stopping membrane belt (4).

5. The double shield TBM membrane strip inflatable dam concrete backfill construction apparatus as claimed in claim 4, wherein: The limiting rod (72) is connected with a limiting block (721) at one end close to the grout stopping membrane belt (4), the surface of the limiting block (721) is provided with a spherical surface, and the limiting block (721) is in abutment with the grout stopping membrane belt (4).

6. The double shield TBM membrane strip inflatable stop-bleed concrete backfill construction apparatus as claimed in claim 5, wherein: The synchronous assembly (74) comprises an action rod (741) connected with the limiting rod (72), a connecting rod (742) connected with the reinforcing rod (73), and a sliding block (743) slidingly connected with the connecting rod (742), the length direction of the action rod (741) is perpendicular to the length direction of the limiting rod (72), and the action rod (741) rotates coaxially with the limiting rod (72), the axis of the connecting rod (742) coincides with the axis of the reinforcing rod (73), the connecting rod (742) rotates coaxially with the reinforcing rod (73), and the action rod (741) is rotationally connected with the sliding block (743).

7. The double shield TBM membrane strip inflatable dam concrete backfill construction apparatus as claimed in claim 1, wherein: The grout stopping membrane belt (4) is made of wear-resistant material.

8. The method for double shield TBM membrane belt inflatable grouting concrete backfill construction, characterized in that: The double-shield TBM membrane belt inflation grout stopping concrete backfill construction device of any one of claims 1-7 comprises the following steps: S1, construction preparation: using strong glue to bond the grout stopping membrane belt (4) to the placing groove (312) of the grout stopping segment (31), and then fixing a plurality of reinforcing devices (7) on both sides of the placing groove (312), and transporting the grout stopping segment (31) and the intermediate segment (21) in a regular manner; S2, establishing a support structure: while the double-shield TBM is excavated, the TBM segment crane sequentially splices the intermediate segment (21) and the grout stopping segment (31) to form a support structure, and one grout stopping ring (3) is inserted after every five intermediate rings (2) are installed; S3, installing the inflation pipe (5): the duckbill bypass air inlet hole of each grout stopping membrane belt (4) is connected with a hard pipe, the hard pipe is sequentially connected with an air valve and a tee joint after extending out of the inflation hole (311), the two sides of the tee joint are connected with soft pipes, and the tee joints of adjacent grout stopping membrane belts (4) are connected through the soft pipes to form an integrated inflation pipe (5); S4, inflating the grout stopping membrane belt (4): after the grout stopping segment (31) is pushed out of the tail shield, the air compressor (6) is communicated with the inflation pipe (5), a pressure regulating valve (61) is connected between the air compressor (6) and the inflation pipe (5), the pressure regulating valve (61) is adjusted, the air compressor (6) is started, the grout stopping membrane belt (4) is inflated, after inflation is completed, each air valve is closed, the air compressor (6) is turned off, and the grout stopping membrane belt (4) fills the gap between the grout stopping segment (31) and the surrounding rock (1); S5, starting the reinforcing device (7): the limiting rod (72) rotates in the process of the gradual expansion of the grout stopping membrane belt (4), the limiting rod (72) drives the action rod (741) to rotate, the action rod (741) drives the connecting rod (742) to move through the sliding block (743), the connecting rod (742) drives the reinforcing rod (73) to rotate, and one end of the reinforcing rod (73) rotates out of the second movable groove (713). S6, self-compacting concrete (8) backfill: self-compacting concrete (8) pump pipeline and grouting hole (211) is connected, self-compacting concrete (8) is filled into the filling space formed by the adjacent two membrane belt ring, middle ring (2), grouting ring (3) and surrounding rock (1) together, until filled, so that the reinforcing rod (73) is embedded in the self-compacting concrete (8), increase the firmness between the grouting pipe piece (31) and the self-compacting concrete (8); S7, the air in the grouting membrane belt (4) is exhausted: after the self-compacting concrete (8) backfill reaches sufficient strength, open the air valve, use the air extractor to exhaust the air in the grouting membrane belt (4), until the grouting membrane belt (4) is dry, immediately close the air valve, keep the grouting membrane belt (4) dry, remove the inflation pipeline (5) elements except the air inlet valve; S8, the next interval backfill construction: repeat steps S3-S7, self-compacting concrete (8) backfill of the next backfill interval is carried out, so that the self-compacting concrete (8) fills the new filling space, and fills the cavity formed after the air in the grouting membrane belt (4) of the last ring is exhausted.

9. The double shield TBM membrane-tired pneumatic concrete-stopping backfill construction method of claim 8, wherein: In step S4, when the air pressure of the grouting membrane belt (4) is lower than the air pressure set value, start the air compressor (6) and open the air valve, until the air pressure of the grouting membrane belt (4) reaches the air pressure set value, close the air compressor (6) and close the air valve.

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