Shield butt joint multi-layer water stop steel plate composite waterproof structure

Abstract

The utility model discloses a shield butt joint multilayer water stop steel plate composite waterproof structure which comprises a preceding shield and a following shield, first waterproof assemblies are arranged between the preceding shield and the following shield, a second waterproof assembly is arranged between the first waterproof assemblies, and the composite waterproof structure is formed through the first waterproof assemblies and the second waterproof assembly. The problems that in the prior art, due to insufficient construction precision, splicing dislocation is caused, gaps are too large, and water stop steel plates are corroded and aged under the long-term underground water pressure effect are effectively solved, meanwhile, the waterproof performance of the tunnel butt joint position can be remarkably improved, underground water leakage is effectively prevented, the structural safety and stability of a tunnel in long-term use are guaranteed, and the service life of the tunnel is prolonged. And meanwhile, a dry and good environment is provided for tunnel interior construction and later operation.

Description

Technical Field

[0001] This utility model relates to the field of underground engineering tunnel technology, specifically to a multi-layer water-stopping steel plate composite waterproof structure for shield tunneling connections. Background Technology

[0002] The multi-layered water-stop steel plate composite waterproof structure for shield tunneling is an important waterproofing technology applied in underground engineering tunnels and other fields. During shield tunneling, when two shield tunnel sections are joined, a multi-layered water-stop steel plate composite waterproof structure is used to ensure the overall waterproof performance of the tunnel. This structure forms a tight waterproof barrier through the cooperation and superposition of multiple water-stop steel plates and their synergistic effect with surrounding materials. It aims to effectively prevent the leakage of groundwater, ensure the structural safety and stability of the tunnel during long-term use, and also provide a dry and good environment for the construction and subsequent operation of the tunnel.

[0003] However, the existing composite waterproof structure of multi-layer waterstop steel plates for shield tunneling still has some shortcomings. On the one hand, during the shield tunneling process, due to the difficulty in ensuring construction accuracy, misalignment or excessive gaps may occur at the joints between the multi-layer waterstop steel plates, thus affecting the overall waterproof effect and making it easy for groundwater to seep into the tunnel from these weak points. On the other hand, with the complex changes in the underground environment and the long-term pressure of groundwater, the multi-layer waterstop steel plates may experience corrosion and aging, leading to a gradual decline in their water-stopping performance and thus affecting the waterproof life of the tunnel. Utility Model Content

[0004] In response to the problems in related technologies, this utility model proposes a multi-layer water-stop steel plate composite waterproof structure for shield tunnel docking, so as to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] Therefore, the specific technical solution adopted by this utility model is as follows:

[0006] A composite waterproof structure with multi-layer water-stop steel plates for shield tunneling includes an advance shield and a follower shield. A first waterproof component is provided between the advance shield and the follower shield, and a second waterproof component is provided between the first waterproof component. The first waterproof component includes two cutterhead ring beams symmetrically arranged between the advance shield and the follower shield. The second waterproof component includes a first protective coating, and the first protective coating is compatible with the cutterhead ring beams, the advance shield, and the follower shield.

[0007] Furthermore, in order to better ensure the support and fixation effect, a first outer water-stop steel plate is provided between the cutterhead ring beams, and a second outer water-stop steel plate is provided between one of the cutterhead ring beams and the advance shield, and the first protective coating is compatible with the first outer water-stop steel plate and the second outer water-stop steel plate.

[0008] Furthermore, to better ensure the water-stopping effect, a first inner water-stopping steel plate is installed at the bottom of the cutterhead ring beam, and a second inner water-stopping steel plate is installed between one of the cutterhead ring beams and the advance shield.

[0009] Furthermore, in order to better ensure the protective effect, a second protective coating is provided between the first outer waterstop steel plate, the second outer waterstop steel plate and the first inner waterstop steel plate, the second inner waterstop steel plate, and the second protective coating is compatible with the cutterhead ring beam, the advance shield, and the follow shield.

[0010] Furthermore, in order to better ensure the connection and fixation effect, protrusions are provided on both sides of the first protective coating, and a connecting groove is opened on one side of the first and second shield tunnels, and the protrusions are adapted to the connecting grooves. A third protective coating is provided around the protrusions, the first protective coating, and the second protective coating, respectively, and the third protective coating is adapted to the protrusions, the first protective coating, and the second protective coating.

[0011] Furthermore, in order to better ensure the support effect, the inner walls of the advance shield and the follow shield are fixedly equipped with slurry chamber partitions, and longitudinal ribs are set at equal intervals between the slurry chamber partitions.

[0012] Furthermore, to better ensure the connection and fixation, a welded steel plate is installed between the rear tunnel boring machine and one of the cutterhead ring beams.

[0013] The beneficial effects of this utility model are as follows: by forming a composite waterproof structure through the first waterproof component and the second waterproof component, the problems of splicing misalignment, excessive gaps, and corrosion and aging of waterstop steel plates caused by insufficient construction precision in the prior art are effectively solved. At the same time, it can significantly improve the waterproof performance of the tunnel joint, effectively prevent groundwater leakage, ensure the structural safety and stability of the tunnel in long-term use, and provide a dry and good environment for tunnel construction and subsequent operation. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a multi-layer water-stop steel plate composite waterproof structure for shield tunneling according to an embodiment of the present utility model;

[0016] Figure 2 This is a structural cross-sectional view of a multi-layer waterstop steel plate composite waterproof structure for shield tunnel docking according to an embodiment of the present utility model;

[0017] Figure 3 This is a partial structural diagram of the second waterproof component of a multi-layer waterstop steel plate composite waterproof structure for shield tunnel docking according to an embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of the second waterproof component of a multi-layer waterstop steel plate composite waterproof structure for shield tunnel docking, according to an embodiment of the present utility model.

[0019] Figure 5 This is a partial structural diagram of the third protective coating of a multi-layer water-stop steel plate composite waterproof structure for shield tunneling according to an embodiment of the present utility model.

[0020] In the picture:

[0021] 1. First tunnel boring machine (TBM); 2. Second tunnel boring machine (TBM); 3. First waterproof component; 301. Cutterhead ring beam; 302. First outer waterstop steel plate; 303. Second outer waterstop steel plate; 304. First inner waterstop steel plate; 305. Second inner waterstop steel plate; 4. Second waterproof component; 401. First protective coating; 402. Second protective coating; 403. Protrusion; 404. Third protective coating; 5. Connecting groove; 6. Slurry chamber partition; 7. Longitudinal rib; 8. Welded steel plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1:

[0024] like Figures 1-5 As shown, a multi-layer water-stop steel plate composite waterproof structure for shield tunnel docking according to an embodiment of the present utility model includes a first shield 1 and a second shield 2. The thickness of the first shield 1, the second shield 2, and the mud-water chamber partition 6 is 80mm. A first waterproof component 3 is provided between the first shield 1 and the second shield 2. A second waterproof component 4 is provided between the first waterproof component 3. The mud-water chamber partition 6 is fixedly provided on the inner wall of the first shield 1 and the second shield 2. The mud-water chamber partition 6 and the inner wall of the first shield 1 and the second shield 2 are integrated into one structure. Longitudinal ribs 7 are provided at equal intervals between the mud-water chamber partitions 6. The longitudinal ribs 7 are 20mm thick, 665mm high, and numbered 28.

[0025] The first waterproof component 3 includes two cutterhead ring beams 301, each measuring 500×200mm. The cutterhead ring beams 301 are symmetrically positioned between the leading shield 1 and the following shield 2. A first outer water-stop steel plate 302 is installed between the cutterhead ring beams 301. A second outer water-stop steel plate 303 is installed between one of the cutterhead ring beams 301 and the leading shield 1. The thickness of both the first and second outer water-stop steel plates 302 and 303 is 8mm, serving for water-stopping and corrosion resistance. A first protective coating 401 is applied to the first... The outer water-stop steel plate 302 and the second outer water-stop steel plate 303 are adapted to each other. The feature is that the bottom end of the cutterhead ring beam 301 is provided with a first inner water-stop steel plate 304, a second inner water-stop steel plate 305 is provided between one of the cutterhead ring beams 301 and the first shield 1, and a welded steel plate 8 is provided between the rear shield 2 and one of the cutterhead ring beams 301. The thickness of the first inner water-stop steel plate 304 is 34mm, the thickness of the second inner water-stop steel plate 305 is 24mm, and it is used for bearing force. The thickness of the welded steel plate 8 is 16mm.

[0026] Example 2:

[0027] like Figures 1-5 As shown in the embodiment of this utility model, a multi-layer water-stop steel plate composite waterproof structure for shield tunneling is provided. The second waterproof component 4 includes a first protective coating 401, which is made of micro-expansion cement and is adapted to the cutterhead ring beam 301, the first shield 1, and the second shield 2. A second protective coating 402 is provided between the first outer water-stop steel plate 302, the second outer water-stop steel plate 303 and the first inner water-stop steel plate 304, the second inner water-stop steel plate 305. The second protective coating 402 is made of epoxy resin grouting material. The second protective coating 402 is adapted to the cutterhead ring beam 301, the first shield 1, and the second shield 2. The first protective coating 401 has protrusions 403 on both sides. The first shield 1 and the second shield 2 have a connecting groove 5 on one side, and the protrusions 403 are adapted to the connecting groove 5. The protrusions 403, the first protective coating 401, and the second protective coating 402 are surrounded by a third protective coating 404, which is made of polysulfide sealant. The third protective coating 404 is adapted to the protrusions 403, the first protective coating 401, and the second protective coating 402 respectively.

[0028] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0029] In summary, with the help of the above-mentioned technical solution of this utility model, the multi-layer water-stop steel plate composite waterproof structure of the shield tunnel docking plays a key waterproofing role in the underground tunnel construction process. When the leading shield 1 docks with the following shield 2, the first waterproof component 3 and the second waterproof component 4 cooperate with each other to form a tight waterproof barrier. First, the two cutterhead ring beams 301 symmetrically arranged between the leading shield 1 and the following shield 2 provide basic support and positioning functions for the entire structure. The first outer water-stop steel plate 302 between the cutterhead ring beams 301 and the second outer water-stop steel plate 303 between one of the cutterhead ring beams 301 and the leading shield 1 together constitute the outer water-stopping defense line. The thickness of the water-stop steel plates is 8mm, possessing excellent water-stopping and corrosion-resistant properties, effectively preventing groundwater from seeping in from the outside. Simultaneously, a first inner water-stop steel plate 304 is installed at the bottom of the cutterhead ring beam 301. A second inner water-stop steel plate 305 is also installed between one of the cutterhead ring beams 301 and the preceding shield 1. The following shield 2 is reinforced with one of the cutterhead ring beams 301 by welded steel plates 8. The first inner water-stop steel plate 304 is 34mm thick, the second inner water-stop steel plate 305 is 24mm thick, and the welded steel plate 8 is 16mm thick. These inner water-stop steel plates and welded steel plates together provide additional structural support and water-stopping function. (Second waterproof component 4...) The first protective coating 401 uses micro-expansion cement material, which is compatible with the cutterhead ring beam 301, the advance shield 1, and the follower shield 2, and fills the spaces between the waterstop steel plates to enhance the integrity and waterproof performance of the structure. The second protective coating 402, which is set between the first outer waterstop steel plate 302, the second outer waterstop steel plate 303 and the first inner waterstop steel plate 304, the second inner waterstop steel plate 305, uses epoxy resin grouting material to further enhance the sealing between the waterstop steel plates. The first protective coating 401 has protrusions 403 on both sides, which are compatible with the connecting grooves 5 opened on one side of the advance shield 1 and the follower shield 2, ensuring a tight connection between the coating and the shield. A third protective coating 404 is also provided around the first protective coating 401 and the second protective coating 402. It is made of polysulfide sealant material and is adapted to the protrusion 403, the first protective coating 401 and the second protective coating 402 respectively to form a multi-layer protection, which effectively prevents groundwater leakage. In addition, the inner walls of the first shield tunnel 1 and the second shield tunnel 2 are fixedly provided with slurry chamber partitions 6. Longitudinal ribs 7 are provided at equal intervals between the slurry chamber partitions 6. The slurry chamber partitions 6 and the inner walls of the first shield tunnel 1 and the second shield tunnel 2 are integrated into a single structure with a thickness of 80mm. The longitudinal ribs 7 are 20mm thick, 665mm high and numbered 28. These structures together provide support and stability for the tunnel interior.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A shield butt joint multi-layer waterstop steel plate composite waterproof structure, characterized in that, The application relates to a double-shield tunneling machine, which comprises a preceding shield (1) and a following shield (2), a first waterproof assembly (3) is arranged between the preceding shield (1) and the following shield (2), a second waterproof assembly (4) is arranged between the first waterproof assembly (3), the first waterproof assembly (3) comprises two cutterhead ring beams (301), the cutterhead ring beams (301) are symmetrically arranged between the preceding shield (1) and the following shield (2), the second waterproof assembly (4) comprises a first protective coating (401), and the first protective coating (401) is matched with the cutterhead ring beams (301), the preceding shield (1) and the following shield (2).

2. The shield joint multi-layer waterstop steel plate composite waterproof structure according to claim 1, characterized in that, First outer side water stop steel plates (302) are arranged between the cutterhead ring beams (301), second outer side water stop steel plates (303) are arranged between one of the cutterhead ring beams (301) and the preceding shield (1), and the first protective coating (401) is matched with the first outer side water stop steel plates (302) and the second outer side water stop steel plates (303).

3. The shield joint multi-layer waterstop steel plate composite waterproof structure according to claim 2, characterized in that, First inner side water stop steel plates (304) are arranged at the bottom ends of the cutterhead ring beams (301), and second inner side water stop steel plates (305) are arranged between one of the cutterhead ring beams (301) and the preceding shield (1).

4. The shield joint multi-layer waterstop steel plate composite waterproof structure according to claim 3, characterized in that, Second protective coatings (402) are arranged between the first outer side water stop steel plates (302), the second outer side water stop steel plates (303), the first inner side water stop steel plates (304) and the second inner side water stop steel plates (305), and the second protective coatings (402) are matched with the cutterhead ring beams (301), the preceding shield (1) and the following shield (2).

5. The shield joint multi-layer waterstop steel plate composite waterproof structure according to claim 4, characterized in that, Protrusions (403) are arranged on the two sides of the first protective coating (401), a connecting groove (5) is formed in one side of the preceding shield (1) and the following shield (2), the protrusions (403) are matched with the connecting groove (5), third protective coatings (404) are arranged on the peripheries of the first protective coating (401) and the second protective coating (402), and the third protective coatings (404) are matched with the protrusions (403), the first protective coating (401) and the second protective coating (402) respectively.

6. The shield joint multi-layer waterstop steel plate composite waterproof structure according to claim 1, characterized in that, Mud tank partition plates (6) are fixedly arranged on the inner walls of the preceding shield (1) and the following shield (2), and longitudinal ribs (7) are arranged at equal intervals between the mud tank partition plates (6).

7. The shield joint multi-layer waterstop steel plate composite waterproof structure according to claim 6, characterized in that, Welded steel plates (8) are arranged between the following shield (2) and one of the cutterhead ring beams (301).

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