Tunnel deformation joint waterproof structure

Abstract

The utility model relates to the technical field of tunnel construction, and provides a tunnel deformation joint waterproof structure which is suitable for a deformation joint of a tunnel, the tunnel comprises a primary support and a secondary lining, and the deformation joint is arranged in the secondary lining; the tunnel deformation joint waterproof structure comprises a waterproof layer arranged between a primary support and a secondary lining; the back pasting type water stop belt is located between the waterproof layer and the secondary lining and laid on the deformation joint; the middle buried type water stop belt is buried in the secondary lining and laid on the deformation joint; and the joint filling material is filled in the deformation joint. Through the arrangement, the waterproof layer, the back-attached water stop belt, the middle-buried water stop belt and the joint filling material act together, multiple protection is provided, the waterproof performance of the deformation joint is greatly improved, and safe operation of a traffic system is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to a waterproof structure for tunnel expansion joints. Background Technology

[0002] With the acceleration of urbanization and the continuous improvement of transportation infrastructure, tunnel engineering plays an increasingly important role in modern transportation networks. Whether it is a highway tunnel, railway tunnel, or subway tunnel, the safety and durability of its structure are directly related to the normal operation of the entire transportation system.

[0003] Expansion joints are structural joints installed during tunnel construction to accommodate different geological conditions, temperature changes, and loads. As an important component of the tunnel structure, they not only need to meet the requirements of structural deformation but also must have good waterproofing performance to prevent groundwater from seeping into the tunnel and affecting traffic safety and structural stability. Traditional tunnel expansion joint waterproofing technology mainly involves filling the expansion joint with sealant and installing embedded waterstops in the tunnel sidewalls (concrete structure) on both sides.

[0004] While the aforementioned waterproofing structure can basically meet the waterproofing requirements of expansion joints, expansion joints are usually located in critical parts of the tunnel (such as the arch, sidewalls, and tunnel floor), and need to withstand large deformations. Under the long-term effects of train vibration loads and the deterioration of the tunnel structure itself, water leakage is still likely to occur at the expansion joints, posing a potential threat to the long-term use of the tunnel.

[0005] Therefore, how to further improve the waterproof performance of expansion joints and ensure the safe operation of transportation systems is an important issue that urgently needs to be addressed. Utility Model Content

[0006] This utility model provides a waterproof structure for tunnel expansion joints, which solves the problem that existing waterproof structures are difficult to meet the waterproof requirements of expansion joints, and can further improve the waterproof performance of tunnel expansion joints, ensuring the safe operation of the transportation system.

[0007] This utility model provides a waterproof structure for tunnel expansion joints, applicable to tunnel expansion joints, wherein the tunnel includes initial support and secondary lining, and the expansion joint is disposed within the secondary lining;

[0008] The waterproof structure for the tunnel expansion joint includes:

[0009] A waterproof layer is provided between the initial support and the secondary lining;

[0010] A back-adhesive waterstop is located between the waterproof layer and the secondary lining, and is laid on the expansion joint;

[0011] The embedded waterstop is embedded in the secondary lining and laid on the expansion joint;

[0012] The joint filler material is used to fill the expansion joint.

[0013] According to the waterproof structure for tunnel expansion joints provided by this utility model, the back-adhesive waterstop includes:

[0014] The first body includes a first surface and a second surface along the thickness direction, wherein the first surface is used to cooperate with the secondary lining;

[0015] A first deformation hole is provided on the first body and the hole wall protrudes from the first surface. The first deformation hole is used to correspond to the position of the deformation joint.

[0016] Multiple first anchor ribs protrude from the first surface, and the multiple first anchor ribs are distributed on both sides of the first deformation hole;

[0017] A first self-adhesive layer is disposed on the first surface.

[0018] According to the waterproof structure for tunnel expansion joints provided by this utility model, the embedded waterstop includes:

[0019] Second subject;

[0020] Multiple second anchor ribs protrude from both sides of the second main body along the thickness direction;

[0021] The second self-adhesive layer is disposed on both sides of the second body along the thickness direction.

[0022] According to the waterproof structure for tunnel expansion joints provided by this utility model, when the embedded waterstop is installed in the arch or wall of the tunnel, it further includes:

[0023] The second deformation hole is provided on the second body and the hole wall protrudes from both sides of the second body along the thickness direction. The second deformation hole is used to correspond to the position of the deformation joint.

[0024] According to the waterproof structure for tunnel expansion joints provided by this utility model, when the secondary lining is located on the arch or wall of the tunnel, the waterproof structure for tunnel expansion joints further includes:

[0025] A support member embedded in the secondary lining, the support member supporting the bottom of the joint filler material along the longitudinal direction of the deformation joint.

[0026] According to the present invention, a waterproof structure for tunnel expansion joints is provided in which, when the secondary lining is located in the invert of the tunnel, shear-resistant steel bars are embedded in the secondary lining and run transversely through the expansion joint in the width direction, and multiple shear-resistant steel bars are arranged along the length direction of the expansion joint.

[0027] According to the present invention, a waterproof structure for tunnel expansion joints is provided, wherein the shear-resistant steel bars are arranged in at least two layers along the longitudinal direction of the expansion joint.

[0028] According to the present invention, a waterproof structure for tunnel expansion joints is provided, wherein the waterproof layer comprises: geotextile nonwoven fabric and waterproof board laid sequentially from the initial support to the secondary lining direction;

[0029] One side of the back-adhesive waterstop is attached to the waterproof membrane, and the other side is fitted with the secondary lining.

[0030] According to the present invention, a waterproof structure for tunnel expansion joints is provided. When the waterproof layer is located in the arch or wall of the tunnel, the waterproof layer further includes a drainage board disposed between the geotextile and the waterproof board, and the side of the drainage board facing the geotextile is provided with a drainage groove.

[0031] According to the present invention, a waterproof structure for tunnel expansion joints is provided, wherein the joint filling material includes asphalt-impregnated wood fiberboard.

[0032] According to the present invention, a waterproof structure for tunnel expansion joints is provided, wherein the supporting component includes reinforcing bars.

[0033] The waterproof structure for tunnel expansion joints provided by this utility model includes a waterproof layer positioned between the initial support and the secondary lining. This waterproof layer prevents groundwater from seeping from the surrounding rock into the secondary lining, providing initial waterproofing. A back-adhesive waterstop located between the waterproof layer and the secondary lining forms a sealed barrier, preventing moisture from seeping in along the expansion joint. A centrally embedded waterstop within the secondary lining further prevents moisture from entering the tunnel through the expansion joint. The sealant filling the expansion joint not only absorbs and disperses stress between structures to a certain extent, reducing pressure directly acting on other waterproof components and ensuring their waterproofing effectiveness and service life, but also forms an effective sealing layer, preventing moisture from entering. The combined action of the waterproof layer, back-adhesive waterstop, centrally embedded waterstop, and sealant provides multiple layers of protection, significantly improving the waterproofing performance at the expansion joint and ensuring the safe operation of the transportation system. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1This is a schematic diagram of the waterproof structure for the expansion joint of the tunnel arch wall provided in this embodiment of the utility model.

[0036] Figure 2 This is a schematic diagram of the structure of the back-adhesive waterstop provided in this embodiment of the utility model.

[0037] Figure 3 This is a schematic diagram of the embedded waterstop provided in an embodiment of the present invention.

[0038] Figure 4 This is a schematic diagram of the waterproof structure for the expansion joint of the tunnel arch provided in this embodiment of the utility model.

[0039] Figure label:

[0040] 10. Initial support; 11. Secondary lining; 12. Expansion joint; 20. Waterproof layer; 200. Geotextile nonwoven fabric; 201. Waterproofing board; 202. Drainage board; 21. Back-adhesive waterstop; 210. First main body; 211. First expansion hole; 212. First anchor rib; 213. First self-adhesive layer; 22. Embedded waterstop; 220. Second main body; 221. Second anchor rib; 222. Second self-adhesive layer; 223. Second expansion hole; 23. Joint filler; 24. Support component; 25. Shear reinforcement. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0042] To better understand the waterproof structure for tunnel expansion joints provided in this utility model embodiment, its application background is first introduced. Tunnels are channels used to connect different areas in modern transportation networks, while expansion joints are structural joints set up during tunnel construction to adapt to different geological conditions, temperature changes, and load effects. Expansion joints not only need to meet the requirements of structural deformation, but also must have good waterproof performance to ensure the safety of traffic.

[0043] Traditional tunnel expansion joint waterproofing technology mainly involves filling the expansion joint with sealant and installing embedded waterstops in the concrete structure of the tunnel sidewalls on both sides.

[0044] While the aforementioned waterproofing structure can basically meet the waterproofing requirements of expansion joints, expansion joints are usually located in critical parts of the tunnel (such as the arch, sidewalls, and tunnel floor), and need to withstand large deformations. Under the long-term effects of train vibration loads and the deterioration of the tunnel structure itself, water leakage is still likely to occur at the expansion joints, posing a potential threat to the long-term use of the tunnel.

[0045] Therefore, how to further improve the waterproof performance of expansion joints and ensure the safe operation of transportation systems is an important issue that urgently needs to be addressed.

[0046] To address the aforementioned problems, this utility model provides a waterproof structure for tunnel expansion joints, which can further improve the waterproof performance of tunnel expansion joints and ensure the safe operation of transportation systems.

[0047] The following is combined with Figures 1-4 This invention describes the waterproof structure for expansion joints.

[0048] Reference Figures 1 to 4 A waterproof structure for tunnel expansion joints is disclosed, applicable to expansion joints 12 in tunnels. The tunnel includes an initial support 10 and a secondary lining 11, with the expansion joint 12 located within the secondary lining 11. The waterproof structure includes a waterproof layer 20, a back-adhered waterstop 21, a centrally embedded waterstop 22, and a joint filler 23. The waterproof layer 20 is positioned between the initial support 10 and the secondary lining 11; the back-adhered waterstop 21 is located between the waterproof layer 20 and the secondary lining 11 and laid on the expansion joint 12; the centrally embedded waterstop 22 is embedded in the secondary lining 11 and laid on the expansion joint 12; and the joint filler 23 fills the expansion joint 12.

[0049] In actual construction, the waterproof layer 20, placed between the initial support 10 and the secondary lining 11, can prevent groundwater from seeping from the surrounding rock into the interior of the secondary lining 11, thus providing initial waterproofing. The back-adhesive waterstop 21, located between the waterproof layer 20 and the secondary lining 11, forms a sealed barrier between them, preventing moisture from seeping in along the expansion joint 12. The embedded waterstop 22, embedded in the secondary lining 11, further prevents moisture from entering the tunnel through the expansion joint 12. The sealant 23, filling the expansion joint 12, not only absorbs and disperses stress between structures to a certain extent, reducing the pressure directly acting on other waterproof components and ensuring their waterproofing effect and service life, but also forms an effective sealing layer to prevent moisture from entering. The waterproof layer 20, the back-adhesive waterstop 21, the embedded waterstop 22, and the sealant 23 work together to provide multiple layers of protection, greatly improving the waterproofing performance at the expansion joint 12 and ensuring the safe operation of the transportation system.

[0050] It is understood that the tunnel structure described above is only a brief description, the purpose of which is to provide a more intuitive understanding of the location of the expansion joint 12 and the layout of each component in the waterproof structure. Of course, in order to realize the function of the tunnel itself, it may also include other structures or components, which will not be described in detail in this embodiment of the utility model. In addition, the specific specifications and parameters of each component in the tunnel structure and waterproof structure can be flexibly designed according to the actual construction scenario, and no specific restrictions are imposed in this embodiment of the utility model.

[0051] Furthermore, the tunnel structures described above can be tunnel arches, walls, or inverts. The specific structural forms of the waterproofing structures located at the tunnel arch / wall and invert locations will differ slightly. For ease of understanding and differentiation, the following will first refer to the attached diagram. Figures 1-3 The waterproofing structure of the expansion joints at the tunnel arch wall location is described in detail.

[0052] In one embodiment of this utility model, the waterproof layer 20 serves as the first layer of protection between the initial support 10 and the secondary lining 11. It includes at least a geotextile nonwoven fabric 200 and a waterproof board 201 arranged sequentially from the initial support 10 to the secondary lining 11. One side of the back-adhesive waterstop 21 is attached to the waterproof board 201, and the other side is fitted with the secondary lining 11.

[0053] Specifically, the main function of the geotextile nonwoven fabric 200 is to effectively filter fine particles in the soil, protect the waterproof membrane 201 from damage, and allow water vapor to pass through while reducing the accumulation of water vapor inside the structure. The waterproof membrane 201 can be made of materials such as high-density polyethylene (HDPE) and polyvinyl chloride (PVC), which have excellent impermeability and prevent water from penetrating into the interior of the secondary lining 11.

[0054] In one embodiment of this utility model, the waterproof layer 20 further includes a drainage board 202 located between the geotextile 200 and the waterproof board 201, and the drainage board 202 has a drainage groove on the side facing the geotextile 200. The drainage board 202 can quickly drain accumulated water and reduce the impact of hydrostatic pressure on the structure.

[0055] The waterproof layer 20, composed of geotextile nonwoven fabric 200, waterproof board 201 and drainage board 202, can prevent groundwater from seeping from the surrounding rock into the interior of the secondary lining 11, thus playing a preliminary waterproofing role. The back-adhesive waterstop 21 has one side in the thickness direction that cooperates with the waterproof layer 20 and the other side that cooperates with the secondary lining 11, thus playing a further waterproofing role.

[0056] In one embodiment of this utility model, the back-adhesive waterstop 21 includes a first body 210, a first deformation hole 211, a first anchor rib 212, and a first self-adhesive layer 213; wherein, the first body 210 includes a first surface and a second surface along the thickness direction, the first surface being used to cooperate with the secondary lining 11; the first deformation hole 211 is disposed on the first body 210 and the hole wall protrudes from the first surface, the first deformation hole 211 being used to correspond to the position of the expansion joint 12; the first anchor rib 212 protrudes from the first surface and is provided in multiples, the multiple first anchor ribs 212 being distributed on both sides of the first deformation hole 211; the first self-adhesive layer 213 is disposed on the first surface.

[0057] Specifically, after the back-adhesive waterstop 21 is laid out, its thickness direction is the longitudinal direction of the expansion joint 12, its width direction is the width direction of the expansion joint 12, and its length direction is the length direction of the expansion joint 12. In other words, the back-adhesive waterstop 21 is laid out along the length direction of the expansion joint 12 and laid on the expansion joint 12 along the width direction.

[0058] The second surface of the first main body 210 cooperates with the waterproof layer 20, and the first surface is used to connect with the secondary lining 11. The first anchor rib 212 protruding from the first surface can increase the contact area between the back-adhesive waterstop 21 and the secondary lining 11, thereby improving the sealing effect and preventing water penetration. The first anchor rib 212 can also increase the stability of the connection between the back-adhesive waterstop 21 and the secondary lining 11. The first self-adhesive layer 213 set on the first surface can enhance the bonding strength between the back-adhesive waterstop 21 and the concrete structure, ensuring that the back-adhesive waterstop 21 can be firmly attached to the position of the expansion joint 12. The first deformation hole 211 corresponding to the position of the expansion joint 12 can better adapt to the deformation of the expansion joint 12, so that the back-adhesive waterstop 21 can maintain the waterproof function.

[0059] The specific number and arrangement of the first anchor ribs 212 can be configured according to actual needs. In one embodiment of this utility model, the first anchor ribs 212 are arranged in pairs, and the two pairs of first anchor ribs 212 are distributed on both sides of the first deformation hole 211. The first self-adhesive layer 213 is disposed between the two first anchor ribs 212 in each pair.

[0060] In one embodiment of this utility model, the first body 210, the first deformation hole 211 and the first anchor rib 212 are integrally formed, and the first self-adhesive layer 213 is made of a non-asphalt adhesive.

[0061] It should be noted that the specific material of the back-adhesive waterstop 21 can be selected according to actual needs, and no specific restrictions are imposed in this embodiment of the utility model.

[0062] In one embodiment of the present invention, the embedded waterstop 22 includes at least a second body 220, a second anchor rib 221, and a second self-adhesive layer 222; wherein, the second anchor rib 221 protrudes from both sides of the second body 220 along the thickness direction and is arranged in multiple ways along the width direction of the second body 220; the second self-adhesive layer 222 is disposed on both sides of the second body 220 along the thickness direction.

[0063] Specifically, the embedded waterstop 22 is pre-embedded within the secondary lining 11. Similar to the back-adhesive waterstop 21, the embedded waterstop 22 is laid along the length of the expansion joint 12 and extended along its width. The second anchor rib 221 protrudes from both sides of the second main body 220 along its thickness direction, which greatly increases the contact area between the embedded waterstop 22 and the secondary lining 11, improves the sealing and waterproofing effect, and enhances the stability of the connection between the embedded waterstop 22 and the secondary lining 11. The second self-adhesive layer 222 on both sides enhances the bonding strength between the embedded waterstop 22 and the concrete structure, ensuring that the embedded waterstop 22 can be firmly attached to the position of the expansion joint 12.

[0064] The specific number and arrangement of the second anchor ribs 221 can be configured according to actual needs. In one embodiment of this utility model, on each surface of the second main body 220, the second anchor ribs 221 are arranged in pairs, and the two groups of second anchor ribs 221 are symmetrically arranged in the middle of the second main body 220. The second self-adhesive layer 222 is disposed between the two first anchor ribs 212 in each group.

[0065] In one embodiment of this utility model, to improve the waterproof sealing effect, the embedded waterstop 22 installed at the expansion joint 12 of the tunnel arch wall further includes a second deformation hole 223. The second deformation hole 223 is located at the center of the second main body 220, and the hole wall protrudes from both sides of the second main body 220 along the thickness direction. The second deformation hole 223 is used to correspond to the position of the expansion joint 12. The second deformation hole 223 corresponding to the position of the expansion joint 12 can better adapt to the deformation of the expansion joint 12, so that the back-adhesive waterstop 21 maintains its waterproof function.

[0066] In one embodiment of this utility model, the waterproof layer 20, the back-adhesive waterstop 21, the embedded waterstop 22 and the joint filler 23 work together to provide multiple layers of protection, greatly improving the waterproof performance of the expansion joint 12 and ensuring the safe operation of the transportation system.

[0067] In some optional embodiments, the joint filler 23 includes, but is not limited to, asphalt joint filler, polyurethane joint filler, polysulfide rubber joint filler, and pine wood boards impregnated with asphalt oil, etc., which can be selected according to actual engineering needs. In this embodiment, the joint filler 23 is asphalt-impregnated wood fiberboard.

[0068] In one embodiment of this utility model, when the secondary lining 11 is the arch or wall of a tunnel, the waterproof structure of the tunnel expansion joint further includes a support member 24 embedded in the secondary lining 11. The support member 24 supports the bottom of the joint filler material 23 along the longitudinal direction of the expansion joint 12. The support member 24 can provide support for the joint filler material 23 and prevent the joint filler material 23 from falling off.

[0069] Specifically, the support member 24 is made of steel bars. The specific size and layout of the steel bars can be set according to actual needs, and no specific restrictions are imposed in this embodiment of the utility model.

[0070] The above is a detailed description of the waterproof structure of the expansion joints in tunnel arch walls. The following section will combine this description with the attached... Figures 1 to 4 The differences between the waterproof structure of the tunnel invert arch expansion joint and the waterproof structure of the tunnel arch wall expansion joint are described in detail. The waterproof structure of the invert arch expansion joint described below can be used as a reference to the waterproof structure of the arch wall expansion joint described above.

[0071] Reference Figures 1 to 4 When the expansion joint 12 is located at the invert of the tunnel, a waterproof layer 20 is still provided between the initial support 10 at the bottom of the tunnel and the secondary lining 11 (i.e., the invert and the invert filling). The waterproof layer 20 includes geotextile nonwoven fabric 200 and waterproof board 201 arranged sequentially from the initial support 10 to the secondary lining 11.

[0072] A centrally embedded waterstop 22 is embedded in the secondary lining 11. The centrally embedded waterstop 22 includes a second main body 220, a second anchor rib 221, and a second self-adhesive layer 222. The second anchor rib 221 protrudes from both sides of the second main body 220 along the thickness direction and is arranged in multiple ways along the width direction of the second main body 220. The second self-adhesive layer 222 is disposed on both sides of the second main body 220 along the thickness direction.

[0073] To reduce deformation and settlement of the invert arch, shear reinforcement bars 25 are embedded in the secondary lining 11, running transversely through the deformation joint 12 along the width direction. Multiple shear reinforcement bars 25 are arranged along the length direction of the deformation joint 12. The shear reinforcement bars 25 enhance the shear resistance of the secondary lining 11 at the invert arch, preventing shear failure of the secondary lining 11 under load.

[0074] Specifically, the shear reinforcement 25 is arranged in at least two layers along the longitudinal direction of the expansion joint 12.

[0075] It is understood that, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples.

[0076] The waterproof structure for tunnel expansion joints provided in this embodiment of the invention provides a waterproof layer 20 between the initial support 10 and the secondary lining 11 that prevents groundwater from seeping into the secondary lining 11 from the surrounding rock, thus providing initial waterproofing. A back-adhesive waterstop 21 between the waterproof layer 20 and the secondary lining 11 forms a sealed barrier, preventing moisture from seeping in along the expansion joint 12. A centrally embedded waterstop 22 within the secondary lining 11 further prevents moisture from entering the tunnel through the expansion joint 12. The sealant 23 filling the expansion joint 12 not only absorbs and disperses stress between structures to a certain extent, reducing pressure directly acting on other waterproof components and ensuring their waterproofing effect and service life, but also forms an effective sealing layer to prevent moisture from entering. The combined action of the waterproof layer 20, the back-adhesive waterstop 21, the centrally embedded waterstop 22, and the sealant 23 provides multiple layers of protection, significantly improving the waterproofing performance at the expansion joint 12 and ensuring the safe operation of the transportation system.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A waterproof structure for tunnel expansion joints, characterized in that, An expansion joint (12) is provided for a tunnel, the tunnel comprising an initial support (10) and a secondary lining (11), the expansion joint (12) being disposed within the secondary lining (11); The waterproof structure for the tunnel expansion joint includes: A waterproof layer (20) is disposed between the initial support (10) and the secondary lining (11); A back-attached waterstop (21) is located between the waterproof layer (20) and the secondary lining (11) and is laid on the expansion joint (12); The embedded waterstop (22) is embedded in the secondary lining (11) and laid on the expansion joint (12); The joint filler (23) is used to fill the expansion joint (12).

2. The waterproof structure for tunnel expansion joints according to claim 1, characterized in that, The back-adhesive waterstop (21) includes: The first body (210) includes a first surface and a second surface along the thickness direction, the first surface being used to cooperate with the secondary lining (11); A first deformation hole (211) is provided on the first body (210) and the hole wall protrudes from the first surface. The first deformation hole (211) is used to correspond to the position of the deformation joint (12). Multiple first anchor ribs (212) protrude from the first surface, and the multiple first anchor ribs (212) are distributed on both sides of the first deformation hole (211); A first self-adhesive layer (213) is disposed on the first surface.

3. The waterproof structure for tunnel expansion joints according to claim 1, characterized in that, The embedded waterstop (22) includes: Second subject (220); Multiple second anchor ribs (221) protrude from both sides of the second body (220) along the thickness direction; The second self-adhesive layer (222) is disposed on both sides of the second body (220) along the thickness direction.

4. The waterproof structure for tunnel expansion joints according to claim 3, characterized in that, When the embedded waterstop (22) is installed in the arch or wall of the tunnel, it also includes: The second deformation hole (223) is provided on the second body (220) and the hole wall protrudes from both sides of the second body (220) along the thickness direction. The second deformation hole (223) is used to correspond to the position of the deformation joint (12).

5. The waterproof structure for tunnel expansion joints according to claim 1, characterized in that, When the secondary lining (11) is located in the arch or wall of the tunnel, the tunnel expansion joint waterproofing structure further includes: A support member (24) is embedded in the secondary lining (11), the support member (24) supporting the bottom of the joint filler (23) along the longitudinal direction of the expansion joint (12).

6. The waterproof structure for tunnel expansion joints according to claim 1, characterized in that, When the secondary lining (11) is located in the invert of the tunnel, shear reinforcement (25) is embedded in the secondary lining (11) and runs through the deformation joint (12) in the width direction. Multiple shear reinforcement (25) are arranged along the length direction of the deformation joint (12).

7. The waterproof structure for tunnel expansion joints according to claim 6, characterized in that, The shear reinforcement (25) is arranged in at least two layers along the longitudinal direction of the deformation joint (12).

8. The waterproof structure for tunnel expansion joints according to any one of claims 1 to 7, characterized in that, The waterproof layer (20) includes: geotextile nonwoven fabric (200) and waterproof board (201) laid sequentially from the initial support (10) to the secondary lining (11); One side of the back-adhesive waterstop (21) is attached to the waterproof membrane (201), and the other side is fitted with the secondary lining (11).

9. The waterproof structure for tunnel expansion joints according to claim 8, characterized in that, When the waterproof layer (20) is located in the arch or wall of the tunnel, the waterproof layer (20) also includes a drainage board (202) disposed between the geotextile (200) and the waterproof board (201), and the drainage board (202) has a drainage groove on the side facing the geotextile (200).

10. The waterproof structure for tunnel expansion joints according to claim 1, characterized in that, The joint filler material (23) includes asphalt wood fiberboard.

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