Reinforcing structure for shield tunnel and reinforcing method thereof

Abstract

The application relates to a reinforcing structure for a shield tunnel and a reinforcing method thereof, and relates to the technical field of shield tunnels, which comprises a tunnel body and a grouting layer arranged on the inner side of the tunnel body, the grouting layer comprises a grouting plate and a plurality of steel reinforcement frameworks arranged between the grouting plate and the tunnel body, the plurality of steel reinforcement frameworks are uniformly distributed at intervals, and the grouting plate is provided with a grouting pipe for injecting concrete into the grouting layer. The grouting layer arranged to support the tunnel body realizes stable reinforcement of the tunnel, thereby helping to prolong the service life of the tunnel.

Description

Technical Field

[0001] This application relates to the field of shield tunnels, and in particular to a reinforcement structure and reinforcement method for shield tunnels. Background Technology

[0002] The shield tunneling method is a fully mechanized construction method in the cut-and-cover method. It involves advancing the shield machine underground, using the shield shell and segments to support the surrounding rock and prevent collapse into the tunnel. At the same time, cutting devices are used to excavate the soil in front of the excavation face, and the soil is transported out of the tunnel by excavation machinery. Jacks are used to pressurize and push the tunnel forward from the rear, and precast concrete segments are assembled to form the tunnel structure.

[0003] Since shield tunnels are located on the ground, they are constantly subjected to compressive forces. Without effective protective measures, the service life of the tunnel will be shortened, and there is a possibility of collapse. If the tunnel collapses, it will not only cause a lot of property damage, but also may result in casualties. Therefore, it is necessary to support and reinforce the tunnel. Summary of the Invention

[0004] In order to achieve stable reinforcement of tunnels and extend their service life, this application provides a reinforcement structure and reinforcement method for shield tunnels.

[0005] The technical solution for a reinforcement structure for shield tunnels provided in this application is as follows:

[0006] A reinforcement structure and reinforcement method for a shield tunnel includes a tunnel body and a grouting layer disposed inside the tunnel body. The grouting layer includes a grouting plate and a plurality of steel reinforcement skeletons disposed between the grouting plate and the tunnel body. The plurality of steel reinforcement skeletons are evenly distributed at intervals, and the grouting plate is provided with a grouting pipe for injecting concrete into the grouting layer.

[0007] By adopting the above technical solution and setting up a grouting layer that can support the tunnel body, the tunnel is stabilized and reinforced, which helps to extend the tunnel's service life.

[0008] Optionally, the grouting plate includes multiple plates, which are distributed sequentially along the inner wall of the tunnel body and abut against each other. Each plate has a connecting groove and a connecting strip on both sides. The connecting strip is used to be embedded and snapped into the connecting groove on the adjacent plate. A plurality of snapping components are provided between an adjacent pair of plates to secure them together.

[0009] By adopting the above technical solution and setting up spliced ​​grouting plates, the installation of grouting plates is facilitated.

[0010] Optionally, the fastening assembly includes a connecting plate, a branch pipe, a support rod, and a fastening plate. The inner wall of the tunnel body is provided with a fastening groove for placing the connecting plate. Anchor bolts are provided in the fastening groove. Connecting holes for anchor bolts to pass through are provided at the four corners of the connecting plate. The branch pipe is vertically arranged on the connecting plate. The fastening plate is arranged on the outside of the plate. The support rod passes through the fastening plate and the plate in sequence. One end of the support rod is provided with a driving plate for abutting against the fastening plate. The end of the support rod away from the driving plate passes through the branch pipe and is threaded to it. A polygonal driving groove is provided on the outside of the driving plate.

[0011] By adopting the above technical solution and setting up a simple and stable clamping component, the adjacent plates are stably clamped and fixed, effectively ensuring the normal working condition of the grouting plate.

[0012] Optionally, multiple pairs of clamping rods are evenly arranged on both sides of the branch pipe along its length, and the multiple pairs of clamping rods are used to clamp multiple steel reinforcement cages in sequence.

[0013] By adopting the above technical solution and setting clamping rods, the steel reinforcement cage is limited and clamped, effectively ensuring the normal working state of the steel reinforcement cage.

[0014] Optionally, a waterproof layer is provided between the tunnel body and the grouting layer. The waterproof layer includes geotextile and a waterproof board. The geotextile is fixed inside the tunnel body by nails, and the waterproof board is located on the side of the geotextile away from the tunnel body.

[0015] By adopting the above technical solution and setting up a waterproof layer, water seepage into the grouting layer is effectively prevented, ensuring the normal working condition of the grouting layer.

[0016] Optionally, a support assembly is provided on the outside of the grouting layer. The support assembly includes an arc-shaped plate, a support column, and a pair of auxiliary columns. The arc-shaped plate is used to abut against the top side of the grouting layer. The support column is vertically arranged below the arc-shaped plate. The pair of auxiliary columns are distributed on both sides of the lower end of the support column and are used to abut against both sides of the grouting layer respectively. The auxiliary columns can be extended and retracted.

[0017] By adopting the above technical solution and setting up a simple and stable support component, the connection and mutual force between the side and top of the grouting layer are realized, further supporting the tunnel body and achieving further reinforcement of the tunnel.

[0018] Optionally, the auxiliary column includes a column body and a tube body. One end of the column body is rotatably connected to an adjusting sleeve. The column body passes through the adjusting sleeve and the tube body in sequence, and the column body and the adjusting sleeve are threadedly connected, while the column body and the tube body are slidably connected.

[0019] By adopting the above technical solution and setting up auxiliary columns with adjustable length, the installation of the support components is facilitated.

[0020] Optionally, a first auxiliary rod is provided between the support column and the auxiliary column, and a second auxiliary rod is provided between a pair of auxiliary columns.

[0021] By adopting the above technical solution and setting the first and second auxiliary rods, the structural strength of the support component is effectively improved.

[0022] The reinforcement method for shield tunnels provided in this application adopts the following technical solution:

[0023] A reinforcement method for a reinforcement structure used in a shield tunnel includes the following steps:

[0024] S1. Install the waterproof layer, using relevant equipment to sequentially install the geotextile and the waterproof layer.

[0025] Installed inside the tunnel body;

[0026] S2. Install the locking assembly, set the locking groove at the corresponding position on the tunnel body, and install the anchor bolt in the adjacent position in the locking groove, and then install the locking assembly;

[0027] S3. Install the grouting layer. First, install multiple layers of the reinforcing steel skeleton in sequence and use the clamping rod to hold the position of each layer of the reinforcing steel skeleton. Then, install the grouting plate and use the clamping assembly to fix the grouting plate.

[0028] S4. Grouting: Concrete is injected into the grouting layer through the grouting pipe to form a reinforced concrete layer.

[0029] S5: Disassemble the grouting plate and the grouting pipe, install the support assembly, so that the support column abuts against the top side of the grouting layer and the auxiliary column abuts against both sides of the grouting layer.

[0030] By adopting the above technical solution and setting up a simple and convenient reinforcement method, the installation of the reinforced structure can be easily achieved.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. By setting up a grouting layer that can support the tunnel body, the tunnel is stabilized and reinforced, which helps to extend the tunnel's service life;

[0033] 2. By setting up a simple and stable clamping component, the adjacent plates are stably clamped and fixed, effectively ensuring the normal working condition of the grouting plate;

[0034] 3. By setting up a simple and stable support component, the connection and mutual force between the side and top of the grouting layer are realized, further supporting the tunnel body and achieving further reinforcement of the tunnel. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0036] Figure 2 This is a schematic diagram of the connection relationship between the tunnel body and the waterproof layer in an embodiment of this application.

[0037] Figure 3 This is a schematic diagram of the connection relationship between the plates in an embodiment of this application.

[0038] Figure 4 This is a schematic diagram showing the connection relationship between the clamping component and the grouting layer in an embodiment of this application.

[0039] Figure 5 yes Figure 4 A magnified view of a portion of region A in the middle.

[0040] Figure 6 This is a schematic diagram of the structure of the support component in the embodiments of this application.

[0041] Explanation of reference numerals in the attached drawings: 1. Tunnel body; 11. Fixing groove; 111. Anchor bolt; 2. Grouting layer; 21. Grouting plate; 211. Plate body; 2111. Connecting groove; 2112. Connecting strip; 22. Reinforcing steel skeleton; 23. Grouting pipe; 24. Arc-shaped groove; 25. Auxiliary groove; 3. Waterproof layer; 31. Geotextile; 311. Nail; 32. Waterproof membrane; 4. Fixing assembly; 41. Connecting plate; 411. Connecting hole; 42. Branch pipe; 421. Clamping rod; 43. Support rod; 431. Drive plate; 4311. Drive groove; 44. Fixing plate; 5. Support assembly; 51. Arc-shaped plate; 52. Support column; 53. Auxiliary column; 531. Auxiliary plate; 532. Column body; 533. Pipe body; 534. Adjusting sleeve; 5341. Drive handle; 6. First auxiliary rod; 7. Second auxiliary rod. Detailed Implementation

[0042] The present application will be further described in detail below with reference to the accompanying drawings.

[0043] This application discloses a reinforcement structure for shield tunnels.

[0044] Reference Figure 1 , Figure 2 A reinforcement structure for shield tunnels includes a tunnel body 1 and a grouting layer 2. A waterproof layer 3 is provided between the grouting layer 2 and the tunnel body 1. The waterproof layer 3 includes a geotextile 31 and a waterproof membrane 32. The geotextile 31 is fixed to the inside of the tunnel body 1 by nails 311, and the waterproof membrane 32 is pasted on the side of the geotextile 31 away from the tunnel body 1 to prevent water from seeping into the grouting layer 2 and to ensure the normal working condition of the grouting layer 2.

[0045] Reference Figure 1 , Figure 2 The grouting layer 2 includes a grouting plate 21 and multiple steel reinforcement skeletons 22. The grouting layer 2 and the steel reinforcement skeletons 22 are matched with the shape of the tunnel body 1. The multiple steel reinforcement skeletons 22 are evenly distributed between the waterproofing plate 32 and the grouting plate 21, and the grouting plate 21 is provided with a grouting pipe 23 for injecting concrete into the grouting layer 2.

[0046] Reference Figure 2 , Figure 3 The grouting plate 21 includes multiple plates 211, which are distributed sequentially along the inner wall of the tunnel body 1 and abut against each other. Connecting grooves 2111 and connecting strips 2112 are respectively provided on both sides of the plate 211 along its length direction. The connecting strips 2112 are used to be embedded and snapped into the connecting grooves 2111 provided on the adjacent plates 211 to achieve the initial connection between the plates 211.

[0047] Reference Figure 4 , Figure 5 Multiple fastening components 4 are provided along the length of an adjacent pair of plates 211, and the multiple fastening components 4 are used to fasten the adjacent plates 211. The fastening components 4 include a connecting plate 41, a branch pipe 42, a support rod 43 and a fastening plate 44.

[0048] Reference Figure 5A locking groove 11 is provided at a corresponding position on the inner wall of the tunnel body 1. The locking groove 11 is used to place the connecting plate 41. The four corners of the connecting plate 41 are provided with connecting holes 411. Anchor bolts 111 are provided at the bottom of the locking groove 11 and pass through the connecting holes 411. The branch pipe 42 is set on the connecting plate 41 and is set perpendicular to the connecting plate 41. The locking plate 44 is set on the outside of the plate body 211 and is used to abut against the plate body 211. The support rod 43 passes through the locking plate 44 and the plate body 211 and passes through the branch pipe 42. The support rod 43 and the branch pipe 42 are threaded together. The end of the support rod 43 away from the branch pipe 42 is provided with a driving plate 431 for abutting against the locking plate 44. The back side of the driving plate 431 away from the support rod 43 is provided with a polygonal driving groove 4311 so that the length of the support rod 43 passing through the branch pipe 42 can be adjusted by tools, thereby realizing the locking of the plate body 211.

[0049] Reference Figure 5 Both sides of the branch pipe 42 are provided with multiple pairs of clamping rods 421 along its length. The multiple pairs of clamping rods 421 are used to clamp multiple steel reinforcement cages 22 in sequence to limit and support the steel reinforcement cages 22 and ensure the normal working state of the steel reinforcement cages 22.

[0050] Reference Figure 1 , Figure 6 A support assembly 5 is provided on the outer side of the grouting layer 2. The support assembly 5 is used to connect the two sides and the top side of the grouting layer 2, thereby realizing the connection between the two sides and the top side of the tunnel slab body and further ensuring the stability of the tunnel body 1. The support assembly 5 includes an arc-shaped plate 51, a support column 52 and a pair of auxiliary columns 53.

[0051] Reference Figure 1 , Figure 2 The support column 52 is vertically installed below the arc plate 51. A pair of auxiliary columns 53 are distributed on both sides of the support rod. An auxiliary plate 531 is provided at the end of the auxiliary column 53 away from the support column 52. An arc groove 24 for the arc plate 51 to be inserted and snapped is provided on the top side of the grouting layer 2. An auxiliary groove 25 for the pair of auxiliary plates 531 to be inserted and snapped is provided on both sides of the grouting layer 2, so as to fix the support component 5.

[0052] Reference Figure 6 The auxiliary column 53 is telescopically adjustable and includes a column body 532, a tube body 533, and an adjusting sleeve 534. The tube body 533 is connected to the support column 52. The adjusting sleeve 534 is located at the end of the tube body 533 away from the support column 52 and is rotatably connected to the tube body 533. The column body 532 passes through the adjusting sleeve 534 and the tube body 533 in sequence, and the column body 532 and the adjusting sleeve 534 are threadedly connected and slidably connected to the tube body 533. At the same time, a drive handle 5341 is sleeved on the adjusting sleeve 534 to facilitate the adjustment of the length of the column body 532 passing through the tube body 533, thereby facilitating the adjustment of the length of the auxiliary column 53.

[0053] Reference Figure 6 A first auxiliary rod 6 is provided between the tube body 533 and the support column 52, and a second auxiliary rod 7 is provided between the tube bodies 533. The first auxiliary rod 6 and the second auxiliary rod 7 are used to improve the overall structural strength of the support assembly 5, thereby ensuring the normal working state of the support assembly 5.

[0054] This application discloses a reinforcement method for shield tunnels.

[0055] A reinforcement method for shield tunnels includes the following steps:

[0056] S1. Install the waterproof layer 3. First, use nails 311 to fix the geotextile 31 to the inside of the tunnel body 1, then...

[0057] The waterproof membrane 32 is attached to the side of the geotextile 31 away from the tunnel body 1;

[0058] S2. Install the fastening assembly 4. According to the drawings, open the fastening groove 11 at the corresponding position on the waterproof layer 3 and the tunnel body 1, and set the anchor bolt 111 in the fastening groove 11. Then fix the connecting plate 41 in the connecting groove 2111 and seal the fastening groove 11 with waterproof coating.

[0059] S3. Install the grouting layer 2. First, install multiple layers of steel reinforcement cage 22 in sequence and use clamping rods 421 to limit the position of each layer of steel reinforcement cage 22. Then, install the grouting plate 21. When the plates 211 of adjacent positions are connected together, the clamping plate 44 is set on the outside of the grouting plate 21 and the support rod 43 passes through the clamping plate 44, the grouting plate 21 and the branch pipe 42 in sequence. Then, adjust the threaded connection length of the support rod 43 and the branch pipe 42 to fix the grouting plate 21.

[0060] S4. Grouting: First, seal the gaps between the plates 211 with a sealing coating. After the coating solidifies, inject concrete into the grouting layer 2 through the grouting pipe 23 to form reinforced concrete.

[0061] S5: Remove the grouting plate 21 and grouting pipe 23. After the concrete has solidified, remove the grouting plate 21 and open the arc-shaped groove 24 and auxiliary groove 25 at the corresponding positions on the grouting layer 2 according to the drawings. Then install the support component 5 so that the arc plate 51 and auxiliary plate 531 are embedded into the arc groove 24 and auxiliary groove 25 in sequence, so that the two are in contact with the grouting layer 2.

[0062] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A reinforcement structure for a shield tunnel, characterized by: The utility model provides a tunnel body (1) and the grouting layer (2) of setting in the inside of tunnel body (1), grouting layer (2) includes grouting plate (21) and sets up between grouting plate (21) and tunnel body (1) multiple steel reinforcement framework (22), multiple steel reinforcement framework (22) evenly distributed, and grouting plate (21) is provided with grouting pipe (23) for injecting concrete in grouting layer (2) in, grouting plate (21) includes multiple plate body (211), multiple plate body (211) follow the inside wall of tunnel body (1) and mutually resist, both sides of plate body (211) are provided with connecting groove (2111) and connecting strip (2112) respectively, connecting strip (2112) is used for embedding and being connected in the connecting groove (2111) of adjacent plate body (211) and is provided with multiple for the fastening assembly (4) of fastening both between adjacent pair of plate body (211), fastening assembly (4) includes connecting plate (41), branch pipe (42), support rod (43) and fastening plate (44), and the inside wall of tunnel body (1) is provided with the fastening groove (11) for placing connecting plate (41), and fastening groove (11) is provided with anchor bolt (111), four corner positions of connecting plate (41) are provided with the connecting hole (411) of the anchor bolt (111) of passing through, branch pipe (42) is vertically set up on connecting plate (41), fastening plate (44) is set up on the outside of plate body (211), support rod (43) is in sequence penetrated in fastening plate (44) and plate body (211), and one end of support rod (43) is provided with the driving plate (431) for resisting fastening plate (44), the end of support rod (43) away from driving plate (431) is threaded into branch pipe (42) and is connected with it, and the outside of driving plate (431) is provided with polygonal driving groove (4311), branch pipe (42) both sides are evenly provided with multiple pairs of clamping rod (421) along its length direction, and multiple pairs of clamping rod (421) are used for clamping multiple steel reinforcement framework (22) in sequence.

2. The reinforcement structure for a shield tunnel according to claim 1, characterized in that: Waterproof layer (3) is arranged between tunnel body (1) and grouting layer (2), and the waterproof layer (3) includes geotextile (31) and waterproof plate (32), the geotextile (31) is fixed in the inside of tunnel body (1) by shooting nail (311), and the waterproof plate (32) is arranged on the side, away from tunnel body (1), of geotextile (31).

3. The reinforcement structure for a shield tunnel according to claim 1, wherein: The grouting layer (2) is provided with a support assembly (5) outside, the support assembly (5) comprises an arc-shaped plate (51), a support column (52) and a pair of auxiliary columns (53), the arc-shaped plate (51) is used for abutting against the top side of the grouting layer (2), the support column (52) is vertically arranged below the arc-shaped plate (51), and the pair of auxiliary columns (53) are distributed on both sides of the lower end of the support column (52) and are used for abutting against both sides of the grouting layer (2) respectively, and the auxiliary column (53) can be telescopically adjusted.

4. The reinforcement structure for a shield tunnel according to claim 3, wherein: The auxiliary column (53) comprises a column body (532) and a pipe body (533), one end of the column body (532) is rotatably connected with an adjusting sleeve (534), the column body (532) is sequentially arranged in the adjusting sleeve (534) and the pipe body (533), and the column body (532) and the adjusting sleeve (534) are screw-connected, and the column body (532) and the pipe body (533) are slidingly connected.

5. The reinforcement structure for a shield tunnel according to claim 3, wherein: The support column (52) and the auxiliary column (53) are provided with a first auxiliary rod (6), and the pair of auxiliary columns (53) are provided with a second auxiliary rod (7).

6. A reinforcing method for reinforcing a structure of a shield tunnel according to any one of claims 3-5, characterized in that: S1, installing a waterproof layer (3), using related equipment to sequentially install a geotextile (31) and a waterproof layer (3) on the inner side of the tunnel body (1); S2, installing the clamping assembly (4), setting the clamping groove (11) on the corresponding position of the tunnel body (1), and installing the anchor bolt (111) in the clamping groove (11) at adjacent positions, and then installing the clamping assembly (4); S3, installing the grouting layer (2), sequentially installing multiple layers of the steel reinforcement cage (22) and using the clamping rod (421) to limit the position of each layer of the steel reinforcement cage, and then installing the grouting plate (21) and fixing the grouting plate (21) by using the clamping assembly (4); S4, grouting, injecting concrete into the grouting layer (2) through the grouting pipe (23) to form a reinforced concrete layer in the grouting layer (2); S5: disassembling the grouting plate (21) and the grouting pipe (23), installing the support assembly (5), making the support column (52) abut against the top side of the grouting layer (2), and the auxiliary column (53) abut against both sides of the grouting layer (2).

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