Shield tunnel segment joint waterproof structure

Abstract

The utility model discloses a shield tunnel segment joint waterproof structure, which belongs to the technical field of tunnel waterproofing and comprises a shield segment, and an outer slot is arranged at one end of the shield segment. According to the waterproof structure, the outer inserting grooves and the outer inserting pieces are matched to seal and prevent water at the joint of the ends of the two shield segments, the side inserting grooves and the side inserting blocks are matched to prevent water at the joint of the sides of the two shield segments, and first-time effective water prevention at the joint of the two shield segments is achieved; and the pouring waterproof ring grooves in the side portions of the other two adjacent shield segments are aligned with each other, grouting is conducted from the material injection grooves to inner cavities of the pouring cavities, grout enters the two aligned pouring waterproof ring grooves from the side material penetrating holes and the end material penetrating holes, and after the grout in the pouring waterproof ring grooves is solidified, the two adjacent shield segments are connected. Therefore, secondary effective waterproofing of the joint of the two shield segments is achieved, and the practicability of the shield segment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel waterproofing, and more specifically, to a waterproof structure for the joints of segment linings in shield tunnels. Background Art

[0002] The lining structure of a shield tunnel is formed by splicing arc-shaped segments into a ring along the circumferential direction through bolts, and then longitudinally splicing through inter-ring bolts. Whether along the circumferential direction or the longitudinal direction, there are joints between segments. The shield tunnel is buried in the stratum and surrounded by groundwater. Due to the characteristic of multiple joints in the segment lining structure, joint waterproofing has become the key and difficult point of the waterproofing of the segment lining structure.

[0003] After retrieval, the utility model patent with the publication number CN219344710U discloses a waterproof structure for the joints of segment linings in shield tunnels, including segment linings in shield tunnels and a joint waterproofing structure. The segment linings in shield tunnels have a water-facing side and a back water-facing side. A joint is formed between two adjacent segment linings in shield tunnels. The joint waterproofing structure is arranged on the water-facing side of the segment linings in shield tunnels. Among them, the joint waterproofing structure includes a waterproof board and a waterproof plug. The waterproof board is attached to the water-facing sides of the two segment linings in shield tunnels on both sides of the joint to cover the joint; the waterproof plug is arranged on the side of the waterproof board facing the water-facing side, and the waterproof plug is embedded in the joint to block the joint; this patent has the joint waterproofing structure arranged on the water-facing side of the segment linings in shield tunnels. The waterproof board isolates the underground seepage water outside the joint, preventing the underground seepage water from seeping into the tunnel through the joint and ensuring the dryness inside the tunnel. However, the above patent still has the following deficiencies: Generally, the weight of segment linings in shield tunnels is large, and the inner diameter of general tunnels is also large, which is not convenient to install the waterproof boards one by one during the installation of segment linings in shield tunnels. Therefore, we propose a waterproof structure for the joints of segment linings in shield tunnels. Summary of the Utility Model

[0004] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a waterproof structure for the joints of segment linings in shield tunnels.

[0005] To solve the above problems, the utility model adopts the following technical solutions:

[0006] A waterproof structure for the joint of shield tunnel segments, comprising shield segments. One end of the shield segment is provided with an outer slot, and the other end of the shield segment is fixedly connected with an outer insert piece. The position of the outer insert piece is adapted to the position of the outer slot. One side of the shield segment is provided with a side slot, and the other side of the shield segment is fixedly connected with a side insert block. The position of the side slot is adapted to the position of the side insert block. Pouring waterproof ring grooves are arranged on the side surface and end surface of the shield segment. A plurality of side material-permeating holes are respectively arranged on both sides of the inner cavity of the pouring waterproof ring groove, and a plurality of end material-permeating holes are respectively arranged at both ends of the inner cavity of the pouring waterproof ring groove. A pouring cavity is arranged inside the shield segment, and the ends of the side material-permeating holes and the end material-permeating holes are respectively communicated with the inner cavity of the pouring cavity.

[0007] As a preferred embodiment of the present invention, a material injection groove is arranged on the shield segment, and the end of the material injection groove is communicated with the inner cavity of the pouring cavity.

[0008] As a preferred embodiment of the present invention, assembling holes are respectively arranged at both ends of the inner side of the shield segment.

[0009] As a preferred embodiment of the present invention, the size of the inner cavity of the outer slot is equal to the size of the outer shape of the outer insert piece.

[0010] As a preferred embodiment of the present invention, the size of the inner cavity of the side slot is equal to the size of the outer shape of the side insert block.

[0011] As a preferred embodiment of the present invention, the shield segment and the outer insert piece are integrally cast.

[0012] Compared with the prior art, the advantages of the present invention are as follows:

[0013] In the present invention, the joint of the ends of two shield segments is sealed and waterproofed through the cooperation of the outer slot and the outer insert piece, and the side joint of two shield segments is waterproofed by the cooperation of the side slot and the side insert block, realizing the first effective waterproofing at the joint of two shield segments. In addition, the pouring waterproof ring grooves on the sides of two adjacent shield segments are aligned with each other. Grout is injected into the inner cavity of the pouring cavity from the material injection groove, and the grout enters the two aligned pouring waterproof ring grooves respectively from the side material-permeating holes and the end material-permeating holes. When the grout in the pouring waterproof ring grooves solidifies, the two adjacent shield segments are connected, thereby realizing the second effective waterproofing at the joint of two shield segments. The waterproof effect of the joint is effectively ensured by using the structure of the shield segment itself and subsequent grouting and pouring, avoiding the installation of other waterproof facilities between two shield segments and improving its practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 This is a schematic structural view of the external insertion piece of the present utility model;

[0016] Figure 3 This is a schematic structural view of the side insertion block of the present utility model;

[0017] Figure 4 This is a schematic structural view of the shield segment of the present utility model;

[0018] Figure 5 This is a schematic sectional view of the present utility model.

[0019] Explanation of the reference numerals in the figure:

[0020] 1. Shield segment; 2. External slot; 3. External insertion piece; 4. Side slot; 5. Side insertion block; 6. Casting waterproof ring groove; 7. Side material-penetrating hole; 8. End material-penetrating hole; 9. Injection groove; 10. Casting cavity; 11. Assembly hole. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Embodiment:

[0025] Please refer toFigures 1-5 , a waterproof structure for the joint of shield tunnel segments, comprising a shield segment 1, an outer slot 2 is opened at one end of the shield segment 1, an outer insertion piece 3 is fixedly connected to the other end of the shield segment 1, the position of the outer insertion piece 3 is adapted to the position of the outer slot 2, a side slot 4 is opened on one side of the shield segment 1, a side insertion block 5 is fixedly connected to the other side of the shield segment 1, the position of the side slot 4 is adapted to the position of the side insertion block 5, a casting waterproof ring groove 6 is opened on the side surface and end surface of the shield segment 1, a plurality of side permeable holes 7 are respectively opened on both sides of the inner cavity of the casting waterproof ring groove 6, and a plurality of end permeable holes 8 are respectively opened at both ends of the inner cavity of the casting waterproof ring groove 6. A casting cavity 10 is arranged inside the shield segment 1, and the ends of the side permeable holes 7 and the end permeable holes 8 are respectively communicated with the inner cavity of the casting cavity 10.

[0026] Specifically, please refer to Figure 4 and Figure 5 , a material injection groove 9 is opened on the shield segment 1, and the end of the material injection groove 9 is communicated with the inner cavity of the casting cavity 10.

[0027] In this embodiment, grouting is carried out into the inner cavity of the casting cavity 10 through the material injection groove 9, so that the slurry enters the casting waterproof ring groove 6 between two adjacent shield segments 1 from the side permeable holes 7 and the end permeable holes 8, thereby carrying out casting connection between two adjacent shield segments 1 and ensuring its waterproof effect.

[0028] Specifically, please refer to Figure 2 , assembly holes 11 are respectively arranged at both ends of the inner side of the shield segment 1.

[0029] In this embodiment, two adjacent shield segments 1 are firmly connected through the assembly holes 11 and fastening connection bolts.

[0030] Specifically, please refer to Figure 2 and Figure 3 , the size of the inner cavity of the outer slot 2 is equal to the size of the outer shape of the outer insertion piece 3.

[0031] In this embodiment, the sealing performance and stability of the outer insertion piece 3 on one shield segment 1 inserted into the outer slot 2 on another shield segment 1 are ensured.

[0032] Specifically, please refer to Figure 2 and Figure 3 , the size of the inner cavity of the side slot 4 is equal to the size of the outer shape of the side insertion block 5.

[0033] In this embodiment, the sealing performance and stability of the side insertion block 5 on one shield segment 1 inserted into the side slot 4 on another shield segment 1 are ensured.

[0034] Specifically, please refer to Figure 2 , the shield segment 1 and the outer insertion piece 3 are integrally cast.

[0035] In this embodiment, mass production of the shield segment 1 and the external insertion piece 3 is ensured.

[0036] Working principle: During use, first, a shield segment 1 is adsorbed and attached to the inner wall of the shield tunnel by a segment erector and positioned and fixed by a jack. Then, another shield segment 1 is transported by the segment erector to the end position of the pipeline of the previous shield segment 1 and is located at the side position of the shield segment 1. At this time, the other shield segment 1 is pushed to slide, so that the external insertion piece 3 on the other shield segment 1 is inserted into the external slot 2 in the previous shield segment 1. The waterproofing of the end docking seam of the two shield segments 1 is achieved by the clamping fit of the external insertion piece 3 and the external slot 2. At the same time, multiple shield segments 1 are assembled into a ring in this way. Then, the segment erector adsorbs another shield segment 1 again and pushes this shield segment 1 to fit with the side of the shield segments 1 assembled into a ring. At the same time, the side insertion block 5 on the side of this shield segment 1 is inserted into the side slot 4 on the side of the other shield segment 1. The waterproofing of the side docking seam of the two shield segments 1 is achieved by the cooperation of the side insertion block 5 and the side slot 4. Finally, the two adjacent shield segments 1 are connected by fastening connection bolts, and grout is injected into the inner cavity of the pouring cavity 10 from the injection groove 9. The slurry in the inner cavity of the pouring cavity 10 moves to the pouring waterproof ring groove 6 through the side material permeating holes 7 and the end material permeating holes 8 respectively. At this time, the pouring waterproof ring grooves 6 on the sides of the two adjacent shield segments 1 are all overflowing with slurry. When the slurry solidifies, the connection between the two adjacent shield segments 1 is realized, and the secondary waterproofing between the two shield segments 1 is achieved. That's all.

[0037] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A shield tunnel segment joint waterproof structure, characterized by: The invention comprises a shield segment (1), wherein one end of the shield segment (1) is provided with an external slot (2), the other end of the shield segment (1) is fixedly connected with an external inserting piece (3), the position of the external inserting piece (3) matches the position of the external slot (2), one side of the shield segment (1) is provided with a side slot (4), the other side of the shield segment (1) is fixedly connected with a side inserting block (5), the position of the side slot (4) matches the position of the side inserting block (5). The shield segment (1) is provided with a casting waterproof annular groove (6) on the side and end surface, a plurality of side penetration holes (7) are respectively provided on both sides of the inner cavity of the casting waterproof annular groove (6), a plurality of end penetration holes (8) are respectively provided at both ends of the inner cavity of the casting waterproof annular groove (6), a casting cavity (10) is provided inside the shield segment (1), and the ends of the side penetration holes (7) and the end penetration holes (8) are respectively connected to the inner cavity of the casting cavity (10).

2. A shield tunnel segment joint waterproof structure according to claim 1, characterized in that: The shield segment (1) is provided with a material injection groove (9), and the end of the material injection groove (9) is connected to the inner cavity of the casting cavity (10).

3. A shield tunnel segment joint waterproof structure according to claim 1, characterized in that: Both ends of the inner side of the shield segment (1) are respectively provided with assembly holes (11).

4. A shield tunnel segment joint waterproof structure according to claim 1, characterized in that: The size of the inner cavity of the outer slot (2) is equal to the size of the outer shape of the outer inserting piece (3).

5. The shield tunnel segment joint waterproof structure according to claim 1, characterized in that: The size of the inner cavity of the side slot (4) is equal to the size of the outer shape of the side insert block (5).

6. A shield tunnel segment joint waterproof structure according to claim 1, characterized in that: The shield segment (1) and the outer insert (3) are integrally cast and formed.

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