Tunnel construction joint waterproof structure

Abstract

The utility model relates to the technical field of tunnel construction, and provides a tunnel construction joint waterproof structure which is suitable for tunnel construction joints. The tunnel comprises a primary support and a secondary lining, and the construction joints comprise an annular construction joint and a longitudinal construction joint which are formed in the secondary lining; the waterproof structure comprises a waterproof layer which is laid between the primary support and the secondary lining; the back pasting type water stop belt is located between the waterproof layer and the secondary lining and laid on the annular construction joint; the first middle buried type water stop belt is buried in the secondary lining and laid on the annular construction joint; and the second middle buried type water stop belt is buried in the secondary lining and laid on the longitudinal construction joint. By means of the arrangement, the waterproof layer, the back pasting type water stop belt, the first middle-buried type water stop belt and the second middle-buried type water stop belt act together, multiple protections are provided for the annular construction joints and the longitudinal construction joints of the tunnel, the waterproof effect of the construction joints is effectively 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 construction joints. Background Technology

[0002] With the acceleration of urbanization and the development of transportation infrastructure, the development and utilization of underground space has become increasingly important. As an important transportation hub connecting different regions, tunnel engineering occupies an irreplaceable position in modern urban planning.

[0003] Tunnel construction joints are joints left during different stages of concrete pouring in tunnel construction due to construction techniques, technical requirements, or practical needs. Construction joints are weak points in the tunnel structure and easily become channels for water leakage. Therefore, waterproofing at tunnel construction joints has become one of the key challenges in ensuring the long-term stable operation of tunnels. Traditional tunnel construction joint waterproofing techniques mainly involve sealing the joints using methods such as waterstops and grouting.

[0004] While the aforementioned waterproofing structure can basically meet the waterproofing requirements of construction joints, it still exhibits certain limitations when facing high water pressure and complex geological environments. Water leakage is prone to occur at construction joints, posing a safety hazard to the long-term use of the tunnel.

[0005] Therefore, how to further improve the waterproofing performance of construction joints and ensure the safe operation of the transportation system has become an important issue that urgently needs to be addressed. Utility Model Content

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

[0007] This utility model provides a waterproof structure for tunnel construction joints.

[0008] Construction joints applicable to tunnels; the tunnel includes initial support and secondary lining, and the construction joints include circumferential construction joints and longitudinal construction joints formed in the secondary lining;

[0009] The waterproof structure includes:

[0010] A waterproof layer is laid between the initial support and the secondary lining;

[0011] A back-adhesive waterstop is located between the waterproof layer and the secondary lining, and is laid on the circumferential construction joint;

[0012] The first type of embedded waterstop is embedded in the secondary lining and laid on the circumferential construction joint;

[0013] The second type of embedded waterstop is embedded in the secondary lining and laid on the longitudinal construction joint.

[0014] According to the waterproof structure for tunnel construction joints provided by this utility model, the back-adhesive waterstop includes:

[0015] The first strip includes a first surface and a second surface along the thickness direction, the first surface being adapted to cooperate with the secondary lining;

[0016] A deformation hole is provided in the first belt body and its outer wall protrudes from the first surface, for corresponding to the position of the circumferential construction joint;

[0017] Multiple first ribs protrude from the first surface and are distributed on both sides of the deformation hole.

[0018] According to the waterproof structure for tunnel construction joints provided by this utility model, the back-adhesive waterstop further includes: a first self-adhesive layer disposed on the first surface.

[0019] According to the waterproof structure for tunnel construction joints provided by this utility model, the first embedded waterstop includes:

[0020] Second band body;

[0021] Multiple second ribs protrude from both sides of the second belt along the thickness direction.

[0022] According to the waterproof structure for tunnel construction joints provided by this utility model, when the circumferential construction joint is located in the arch wall of the tunnel, the second embedded waterstop further includes:

[0023] The second self-adhesive layer is disposed on both sides of the first embedded waterstop along the thickness direction.

[0024] According to the waterproof structure for tunnel construction joints provided by this utility model, the second embedded waterstop includes:

[0025] Third zone body,

[0026] Anchor edges are provided on both sides of the third belt along its width direction and are set at an angle to the third belt.

[0027] According to the present invention, a waterproof structure for tunnel construction joints is provided, wherein the anchor edge is made of galvanized steel plate.

[0028] According to the present invention, a waterproof structure for tunnel construction joints is provided, wherein the circumferential construction joint and / or the longitudinal construction joint is filled with a cement-based penetrating crystalline waterproof coating.

[0029] According to the present invention, a waterproof structure for tunnel construction joints is provided, wherein the waterproof layer comprises geotextile nonwoven fabric and waterproof board laid sequentially from the initial support to the secondary lining, one side of the back-adhesive waterstop is attached to the waterproof board, and the other side is fitted to the secondary lining.

[0030] According to the waterproof structure for tunnel construction joints provided by this utility model, when the waterproof layer is located on the arch wall of the tunnel, the waterproof layer further includes:

[0031] A drainage board is laid between the geotextile and the secondary lining, and a drainage groove is provided on the side of the drainage board facing the geotextile.

[0032] The waterproof structure for tunnel construction joints provided by this utility model forms a continuous and seamless waterproof barrier between the initial support and the secondary lining, preventing groundwater from seeping from the surrounding rock into the secondary lining and providing initial waterproofing. A back-adhesive waterstop located between the waterproof layer and the initial support provides initial sealing for the circumferential construction joint, preventing water from seeping into the tunnel along the circumferential joint, thus providing secondary waterproofing. A first embedded waterstop embedded in the secondary lining provides further sealing for the circumferential construction joint, further preventing water from seeping into the tunnel along the circumferential joint, thus providing tertiary waterproofing. A second embedded waterstop embedded in the secondary lining prevents water from seeping into the tunnel along the longitudinal construction joint. The waterproof layer, back-adhesive waterstop, first embedded waterstop, and second embedded waterstop work together to provide multiple layers of protection for the circumferential and longitudinal construction joints of the tunnel, effectively improving the waterproofing effect at the construction joints and ensuring the safe operation of the transportation system. Attached Figure Description

[0033] 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.

[0034] Figure 1 This is a schematic diagram of the waterproof structure for the circumferential construction joint of the tunnel arch wall provided in this embodiment of the utility model.

[0035] Figure 2 This is a schematic diagram of the waterproof structure of the circumferential construction joint of the tunnel arch provided in this embodiment of the utility model.

[0036] Figure 3 This is a schematic diagram of the tunnel longitudinal joint waterproofing structure provided in this embodiment of the utility model.

[0037] Figure 4 This is a schematic diagram of the structure of the back-adhesive waterstop provided in this embodiment of the utility model.

[0038] Figure 5 This is a structural schematic diagram of the first embedded waterstop provided in this embodiment of the utility model.

[0039] Figure 6 This is a schematic diagram of the structure of the second embedded waterstop provided in this embodiment of the utility model.

[0040] Figure label:

[0041] 10. Initial support; 11. Secondary lining; 12. Circumferential construction joint; 13. Longitudinal construction joint; 20. Waterproof layer; 200. Geotextile nonwoven fabric; 201. Waterproofing membrane; 202. Drainage membrane; 21. Back-adhesive waterstop; 210. First strip body; 211. Deformation hole; 212. First rib; 213. First self-adhesive layer; 22. First embedded waterstop; 220. Second strip body; 221. Second rib; 222. Second self-adhesive layer; 23. Second embedded waterstop; 230. Third strip body; 231. Anchor side. Detailed Implementation

[0042] 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.

[0043] To better understand the waterproof structure for tunnel construction joints provided in this utility model embodiment, its application background is introduced first. Tunnels are important transportation hubs connecting different areas. Tunnel construction joints refer to the joints left when pouring concrete at different stages during the tunnel construction process due to construction technology, technical requirements, or actual operational needs. Construction joints are weak points in the tunnel structure and are prone to becoming channels for water leakage. Therefore, waterproofing construction joints is crucial to ensuring the long-term stable operation of tunnels.

[0044] Traditional waterproofing techniques for tunnel construction joints primarily involve sealing the joints with waterstops and grouting. While these waterproofing structures can generally meet the waterproofing requirements of construction joints, they still exhibit limitations when facing high water pressure and complex geological environments. Leakage can easily occur at the construction joints, posing safety hazards for the long-term use of the tunnel.

[0045] Therefore, how to further improve the waterproofing performance of construction joints and ensure the safe operation of the transportation system has become an important issue that urgently needs to be addressed.

[0046] To address the aforementioned problems, this utility model provides a waterproof structure for tunnel construction joints, which can further improve the waterproofing effect at construction joints and ensure the safe operation of the transportation system.

[0047] The following is combined with Figures 1-6 This invention describes a waterproof structure for tunnel construction joints.

[0048] Reference Figures 1 to 3 A waterproof structure for tunnel construction joints is applicable to the construction joints of tunnels, the tunnel including initial support 10 and secondary lining 11, the construction joints including circumferential construction joint 12 and longitudinal construction joint 13 formed in the secondary lining 11, wherein circumferential refers to the circumference of the tunnel, and longitudinal refers to the direction along the centerline of the tunnel.

[0049] The waterproof structure of the tunnel construction joint includes a waterproof layer 20, a back-adhesive waterstop 21, a first embedded waterstop 22, and a second embedded waterstop 23. The waterproof layer 20 is laid between the initial support 10 and the secondary lining 11. The back-adhesive waterstop 21 is located between the waterproof layer 20 and the secondary lining 11 and is laid on the circumferential construction joint 12. The first embedded waterstop 22 is embedded in the secondary lining 11 and laid on the circumferential construction joint 12. The second embedded waterstop 23 is embedded in the secondary lining 11 and laid on the longitudinal construction joint 13.

[0050] In practical applications, the waterproof layer 20 can form a continuous and seamless waterproof barrier between the initial support 10 and the secondary lining 11, preventing 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 located between the waterproof layer 20 and the initial support 10 can provide preliminary sealing for the circumferential construction joint 12, preventing water from seeping into the tunnel interior along the circumferential construction joint 12, thereby playing a secondary waterproofing role for the circumferential construction joint 12. The first embedded waterstop 22 buried in the secondary lining 11 can provide secondary sealing for the circumferential construction joint 12, further preventing water from seeping into the tunnel interior along the circumferential construction joint 12, thus playing a tertiary waterproofing role for the circumferential construction joint 12. The second embedded waterstop 23 buried in the secondary lining 11 can prevent water from seeping into the tunnel interior along the longitudinal construction joint 13. The waterproof layer 20, the back-adhesive waterstop 21, the first embedded waterstop 22, and the second embedded waterstop 23 work together to provide multiple layers of protection for the circumferential construction joint 12 and the longitudinal construction joint 13 of the tunnel, effectively improving the waterproofing effect at the construction joints and ensuring the safe operation of the transportation system.

[0051] It should be noted that the above description of the tunnel structure is only a brief overview, intended to provide a more intuitive understanding of the placement of various components in the waterproof structure. For other tunnel structures, please refer to existing technologies. This utility model embodiment will not elaborate further. In addition, the specific specifications and parameters of each component in the waterproof structure can be flexibly adjusted based on actual construction needs. This utility model embodiment does not impose any specific limitations.

[0052] It is understood that the circumferential construction joint 12 described above can be located in the tunnel arch wall or the tunnel invert. The waterproofing structure at the construction joint at different locations may be slightly different. The waterproofing structure at the construction joint at different locations will be described in turn below with reference to the attached drawings and multiple embodiments.

[0053] First, it will be combined with the appendix Figures 1 to 6 The waterproofing structure at the circumferential construction joint 12 of the tunnel arch wall is described in detail.

[0054] In one embodiment of this utility model, the waterproof layer 20 serves as the first-layer waterproof barrier between the initial support 10 and the secondary lining 11. It comprises at least a geotextile nonwoven fabric 200 and a waterproof membrane 201 laid sequentially from the initial support 10 to the secondary lining 11. The geotextile nonwoven fabric 200 provides protection for the waterproof membrane 201, preventing unevenness or sharp objects on the surface of the initial support 10 from directly contacting the waterproof membrane 201, thus protecting it from damage. It also possesses excellent drainage performance, guiding and draining water seeping from the initial support 10, thereby reducing the pressure on the waterproof membrane 201 and ensuring its functional stability. The waterproof membrane 201 is the core component of the entire waterproof layer 20, used to prevent water from penetrating into the tunnel interior to ensure the safety of the tunnel structure. The waterproof membrane 201 is typically made of high-density polyethylene (HDPE), polyvinyl chloride (PVC), or similar materials, giving it excellent impermeability and ensuring its waterproofing capability.

[0055] It is understood that the specific specifications of the geotextile nonwoven fabric 200 and the waterproof board 201 can be configured according to actual construction needs, and no specific restrictions are imposed in this embodiment of the utility model.

[0056] In one embodiment of this utility model, the waterproof layer 20 further includes a drainage board 202 laid between the geotextile 200 and the waterproof board 201. A drainage groove is provided on the side of the drainage board 202 facing the geotextile 200. The drainage board 202 can quickly drain accumulated water, reducing the impact of additional water pressure caused by accumulated water on the waterproof layer 20, and further enhancing the overall reliability of the waterproof layer 20.

[0057] The back-adhesive waterstop 21 serves as a waterproof barrier between the waterproof layer 20 and the secondary lining 11, providing secondary waterproofing for the circumferential construction joint of the tunnel arch wall. One side of the waterstop is tightly attached to the waterproof membrane 201, while the other side is connected to the secondary lining 11.

[0058] Specifically, the back-adhesive waterstop 21 is arranged along the length of the circumferential construction joint 12 and laid on the circumferential construction joint 12 along its width. The back-adhesive waterstop 21 includes a first strip body 210, deformation holes 211, and a plurality of first ribs 212; wherein, the first strip body 210 includes a first surface and a second surface along the thickness direction, the first surface is used to connect with the secondary lining 11, and the second surface is used to tightly adhere to the waterproof membrane 201; the deformation holes 211 are provided on the first strip body 210 and the outer wall protrudes from the first surface, corresponding to the position of the circumferential construction joint 12; the first ribs 212 protrude from the first surface of the first strip body 210, and the plurality of first ribs 212 are distributed on both sides of the deformation holes 211.

[0059] After the back-adhesive waterstop 21 is installed, multiple first ribs 212 are embedded in the secondary lining 11. This not only increases the contact area between the back-adhesive waterstop 21 and the secondary lining 11, extending the water infiltration path and improving the sealing effect, but also increases the stability of the connection between the back-adhesive waterstop 21 and the secondary lining 11, ensuring that the back-adhesive waterstop 21 can be firmly attached to the position of the circumferential construction joint 12. The deformation holes 211 corresponding to the position of the circumferential construction joint 12 can adapt to the deformation of the circumferential construction joint 12, allowing the back-adhesive waterstop 21 to maintain good waterproof performance.

[0060] In one embodiment of this utility model, the back-adhesive waterstop 21 further includes a first self-adhesive layer 213 disposed on the first surface. The first self-adhesive layer 213 can enhance the bonding strength between the back-adhesive waterstop 21 and the secondary lining 11, further improve the firmness of the back-adhesive waterstop 21 at the circumferential construction joint 12, and at the same time fill any gaps that may exist between the first surface and the secondary lining 11, thereby improving the waterproof sealing effect.

[0061] Specifically, the multiple first ribs 212 are arranged in pairs, and the two groups of first ribs 212 are distributed on both sides of the deformation hole 211. The first self-adhesive layer 213 is disposed between the two first ribs 212 in each group, so that the first self-adhesive layer 213 can fully cooperate with the first ribs 212 to improve the sealing and waterproof performance.

[0062] In one embodiment of this utility model, the back-adhesive waterstop 21 is integrally molded. The specific material of the back-adhesive waterstop 21 can be set according to actual needs, and no specific limitation is made in this embodiment of the utility model.

[0063] In one embodiment of this utility model, the first self-adhesive layer 213 is made of a non-asphalt adhesive.

[0064] In one embodiment of this utility model, the first embedded waterstop 22 serves as a waterproof barrier embedded in the secondary lining 11, providing three layers of waterproofing for the circumferential construction joint 12.

[0065] Specifically, the first embedded waterstop 22 is arranged along the length of the circumferential construction joint 12 and laid on the circumferential construction joint 12 along its width. The first embedded waterstop 22 includes a second strip body 220 and multiple second ribs 221; wherein, the multiple second ribs 221 are distributed on both sides of the second strip body 220 along its thickness direction. After the first embedded waterstop 22 is laid, the multiple second ribs 221 not only increase the contact area between the first embedded waterstop 22 and the secondary lining 11, extend the water infiltration path, and improve the sealing effect, but also increase the stability of the connection between the first embedded waterstop 22 and the secondary lining 11, ensuring that the first embedded waterstop 22 can be firmly attached to the position of the circumferential construction joint 12.

[0066] In one embodiment of this utility model, the first embedded waterstop 22 further includes a second self-adhesive layer 222, which is disposed on both sides of the second strip body 220 along the thickness direction. The second self-adhesive layer 222 enhances the bonding strength between the first embedded waterstop 22 and the secondary lining 11, further improving the adhesion of the first embedded waterstop 22 at the circumferential construction joint 12. Simultaneously, it fills any gaps that may exist between the second strip body 220 and the secondary lining 11, improving the waterproof sealing effect.

[0067] Specifically, multiple second ribs 221 are arranged in pairs, and multiple sets of second ribs 221 are distributed on both sides of the second belt 220 along the thickness direction. The second self-adhesive layer 222 is disposed between two second ribs 221 in each group, so that the second self-adhesive layer 222 can fully cooperate with the second ribs 221 to improve the sealing and waterproof performance.

[0068] In one embodiment of this utility model, the first embedded waterstop 22 is integrally formed. The specific material of the first embedded waterstop 22 can be set according to actual needs, and no specific limitation is made in this embodiment of the utility model.

[0069] The combined action of the waterproof layer 20, the back-adhesive waterstop 21, and the first embedded waterstop 22 provides multiple layers of protection, effectively improving the waterproofing effect at the circumferential construction joint 12 of the tunnel arch wall.

[0070] The above is a detailed description of the waterproofing structure of the circumferential construction joint 12 in the tunnel arch wall. The following will be combined with the attached... Figures 1 to 4The differences between the waterproof structure of the circumferential construction joint 12 of the tunnel invert and the waterproof structure of the circumferential construction joint 12 of the arch wall are described in detail below. The waterproof structure of the circumferential construction joint 12 of the invert described below and the waterproof structure of the circumferential construction joint 12 of the arch wall described above can be referred to accordingly.

[0071] Reference Figures 3 to 5 When the construction joint 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. One side of the back-adhesive waterstop 21 is tightly attached to the waterproof board 201, and the other side is connected to the secondary lining 11.

[0072] A first embedded waterstop 22 is also embedded in the secondary lining 11. The first embedded waterstop 22 is arranged along the length of the circumferential construction joint 12 and laid on the circumferential construction joint 12 along the width direction. The first embedded waterstop 22 includes a second strip body 220 and a plurality of second ribs 221 disposed on both sides of the second strip body 220 along the thickness direction. After the first embedded waterstop 22 is laid out, the plurality of second ribs 221 are embedded in the concrete structure of the secondary lining 11 to ensure the waterproof sealing performance of the first embedded waterstop 22.

[0073] The above is a detailed description of the waterproof structure of the circumferential construction joint 12 at the tunnel arch and invert. The following is a detailed description of the waterproof structure of the longitudinal construction joint 13 in conjunction with the attached drawings.

[0074] Reference Figure 3 and Figure 6 The longitudinal construction joint 13 of the tunnel extends along the centerline of the tunnel. When the construction joint is longitudinal, the waterproof layer 20 includes at least geotextile nonwoven fabric 200 and waterproof membrane 201 arranged sequentially from the initial support 10 to the secondary lining 11. The secondary lining 11 is tightly bonded to the waterproof membrane 201. A second embedded waterstop 23 is embedded in the secondary lining 11. The second embedded waterstop 23 is laid along the length of the longitudinal construction joint 13 and is laid on the longitudinal construction joint 13 along its own width. The thickness direction of the second embedded waterstop 23 is the longitudinal direction of the longitudinal construction joint 13.

[0075] Specifically, the second embedded waterstop 23 includes a third strip body 230 and anchor edges 231; wherein, the anchor edges 231 are disposed on both sides of the third strip body 230 along the width direction and are set at an angle to the third strip body 230. After the second embedded waterstop 23 is installed, the anchor edges 231 on both sides not only increase the contact area between the second embedded waterstop 23 and the secondary lining 11, extend the water infiltration path, and improve the sealing effect, but also increase the stability of the connection between the second embedded waterstop 23 and the secondary lining 11, ensuring that the second embedded waterstop 23 can be firmly attached to the position of the circumferential construction joint 12.

[0076] Specifically, the anchor edge 231 forms a 135-degree angle with the third belt body 230.

[0077] In one embodiment of this utility model, the anchor edge 231 is made of galvanized steel plate. The anchor edge 231 made of galvanized steel plate can provide additional strength and rigidity to the second embedded waterstop 23, enabling the second embedded waterstop 23 to withstand greater physical pressure and deformation, and is not easily stretched or torn. In addition, the galvanized steel edge has good adhesion to concrete, which enhances the water-stopping effect.

[0078] In one embodiment of this utility model, the second embedded waterstop 23 is integrally formed from galvanized steel plate.

[0079] It is understood that the specific specifications of the second embedded waterstop 23 can be flexibly set according to actual construction needs, and no specific restrictions are imposed in this embodiment of the utility model.

[0080] In one embodiment of this utility model, a cement-based penetrating crystalline waterproof coating can be filled into the circumferential construction joint 12 and / or the longitudinal construction joint 13. Utilizing the unique physicochemical properties of the cement-based penetrating crystalline waterproof coating, it can fill and repair the construction joint to a certain extent, achieving a good waterproof effect.

[0081] 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.

[0082] The waterproof structure for tunnel construction joints provided by this utility model embodiment allows the waterproof layer 20 to form a continuous and seamless waterproof barrier between the initial support 10 and the secondary lining 11, preventing 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 initial support 10 provides initial sealing for the circumferential construction joint 12, preventing water from seeping into the tunnel interior along the circumferential construction joint 12, thereby providing secondary waterproofing for the circumferential construction joint 12. The first embedded waterstop 22 embedded in the secondary lining 11 provides secondary sealing for the circumferential construction joint 12, further preventing water from seeping into the tunnel interior along the circumferential construction joint 12, thus providing tertiary waterproofing for the circumferential construction joint 12. The second embedded waterstop 23 embedded in the secondary lining 11 prevents water from seeping into the tunnel interior along the longitudinal construction joint 13. The waterproof layer 20, the back-adhesive waterstop 21, the first embedded waterstop 22, and the second embedded waterstop 23 work together to provide multiple layers of protection for the circumferential construction joint 12 and the longitudinal construction joint 13 of the tunnel, effectively improving the waterproofing effect at the construction joints and ensuring the safe operation of the transportation system.

[0083] 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 construction joints, characterized in that, Construction joints applicable to tunnels; the tunnel includes an initial support (10) and a secondary lining (11), and the construction joints include a circumferential construction joint (12) and a longitudinal construction joint (13) formed in the secondary lining (11); The waterproof structure includes: A waterproof layer (20) is laid 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 circumferential construction joint (12); The first embedded waterstop (22) is embedded in the secondary lining (11) and laid on the circumferential construction joint (12); The second embedded waterstop (23) is embedded in the secondary lining (11) and laid on the longitudinal construction joint (13).

2. The waterproof structure for tunnel construction joints according to claim 1, characterized in that, The back-adhesive waterstop (21) includes: The first strip (210) includes a first surface and a second surface along the thickness direction, the first surface being adapted to cooperate with the secondary lining (11); A deformation hole (211) is provided on the first belt body (210) and its outer wall protrudes from the first surface, for corresponding to the position of the circumferential construction joint (12); Multiple first ribs (212) protrude from the first surface and are distributed on both sides of the deformation hole (211).

3. The waterproof structure for tunnel construction joints according to claim 2, characterized in that, The back-adhesive waterstop (21) further includes a first self-adhesive layer (213) disposed on the first surface.

4. The waterproof structure for tunnel construction joints according to claim 1, characterized in that, The first embedded waterstop (22) includes: Second band (220); Multiple second ribs (221) protrude from both sides of the second belt (220) along the thickness direction.

5. The waterproof structure for tunnel construction joints according to claim 4, characterized in that, When the circumferential construction joint (12) is located in the arch wall of the tunnel, the second embedded waterstop (23) further includes: The second self-adhesive layer (222) is disposed on both sides of the first embedded waterstop (22) along the thickness direction.

6. The waterproof structure for tunnel construction joints according to claim 1, characterized in that, The second embedded waterstop (23) includes: Third band body (230), Anchor edges (231) are provided on both sides of the third belt (230) along the width direction and are set at an angle to the third belt (230).

7. The waterproof structure for tunnel construction joints according to claim 6, characterized in that, The anchor edge (231) is made of galvanized steel plate.

8. The waterproof structure for tunnel construction joints according to claim 1, characterized in that, The circumferential construction joint (12) and / or the longitudinal construction joint (13) are filled with a cement-based penetrating crystalline waterproof coating.

9. The waterproof structure for tunnel construction joints according to any one of claims 1 to 8, 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 board (201), and the other side is fitted to the secondary lining (11).

10. The waterproof structure for tunnel construction joints according to claim 9, characterized in that, When the waterproof layer (20) is located on the arch wall of the tunnel, the waterproof layer (20) further includes: A drainage board (202) is laid between the geotextile (200) and the secondary lining (11), and a drainage groove is provided on the side of the drainage board (202) facing the geotextile (200).

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