Underground diaphragm wall joint structure

Abstract

The utility model belongs to the technical field of civil engineering, and discloses an underground diaphragm wall joint structure which comprises a first groove section, a second groove section, a first connecting piece and a second connecting piece, the first groove section is provided with a first end connecting part, the second groove section is provided with a second end connecting part, and the second end connecting part is connected with the first end connecting part. The first connecting piece comprises a supporting part and an inserting part which are connected with each other, the supporting part is arranged in the first groove section, the inserting part is located at the end, facing the second groove section, of the supporting part, the second connecting piece is arranged on the second end connecting part and provided with a connecting groove, and the inserting part is inserted into the connecting groove. A water stop piece is arranged on the outer wall of the inserting part and / or the inner wall of the connecting groove. The water stop piece has the characteristic of swelling when encountering water and can rapidly swell when making contact with water to fill a tiny gap between the inserting part and the inner wall of the connecting groove, and the waterproof performance between the first end connecting part and the second end connecting part is improved.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering technology, and in particular to a joint structure for underground continuous wall. Background Technology

[0002] A diaphragm wall is constructed by excavating a long, narrow trench along the perimeter of the proposed underground structure using trenching equipment. After cleaning the trench, concrete is poured to form a unit trench segment. This process is repeated segment by segment to build a continuous reinforced concrete wall underground. The diaphragm wall joint is a critical part that connects the various unit trench segments during the segmented construction of the wall. Its quality directly affects the integrity, impermeability, and structural strength of the wall.

[0003] Existing technologies for diaphragm wall joints include circular interlocking pipe joints, I-beam joints, cross-plate joints, and milling joints, which are mainly used to transfer shear force and bending moment between sections, so that each section forms an integral diaphragm wall structure, while preventing groundwater or mud from seeping through the joints between sections.

[0004] However, existing joint designs are often insufficient to completely prevent groundwater or mud from seeping into the interior of the wall from the joint, resulting in poor waterproofing performance of the diaphragm wall. Utility Model Content

[0005] The purpose of this utility model is to provide a joint structure for underground continuous wall to solve the problem of poor waterproofing performance at the joint of two adjacent trench sections.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The diaphragm wall joint structure includes:

[0008] The first slot segment has a first end connector at one end;

[0009] The second groove segment has a second end portion at one end, which is connected to the first end portion.

[0010] A first connector, comprising a support portion and an insert portion connected to each other, wherein the support portion is disposed in the first groove segment and the insert portion is located at one end of the support portion facing the second groove segment;

[0011] The second connector is disposed at the second end portion and has a connecting groove. The insert portion is inserted into the connecting groove, and the outer wall of the insert portion and / or the inner wall of the connecting groove are provided with a water-stopping element.

[0012] Optionally, the length of the water-stopping element is not less than the height of the first groove segment and the second groove segment.

[0013] Optionally, the first connector and the second connector are one-to-one and at least two of each are provided, and at least two of the first connectors are arranged sequentially along the thickness direction of the first groove segment.

[0014] Optionally, the second end portion is a cross plate, including a first plate and a second plate connected to each other. The first plate is connected to one end of the second groove segment facing the first groove segment, and the second plate protrudes from the side of the first plate segment facing the first groove segment. Two second connectors are provided, and the second plate is disposed between the two second connectors.

[0015] Optionally, the first connector is a T-shaped plate, the support portion is the web of the T-shaped plate, and the insertion portion is the flange of the T-shaped plate.

[0016] Optionally, the first channel segment further includes a steel reinforcement structure, and the support portion is fixedly connected to the steel reinforcement structure.

[0017] Optionally, the connecting groove has a first opening and a second opening at both ends along the height direction of the second groove segment and a third opening facing the first groove segment, and the width of the third opening is smaller than the width of the bottom of the connecting groove.

[0018] Optionally, the water-stopping component is an EPDM rubber seal.

[0019] Optionally, a grouting channel is provided at the connection between the first end portion and the second end portion, the grouting channel being used to inject waterproof grout after the first end portion and the second end portion are connected.

[0020] Optionally, the surfaces of the first termination portion, the first connector, and the second connector are all provided with a corrosion-resistant coating.

[0021] The beneficial effects of this utility model are:

[0022] This utility model provides a joint structure for a diaphragm wall, including a first groove segment, a second groove segment, a first connector, and a second connector. The first groove segment has a first end connection, and the second groove segment has a second end connection, which are connected to the first end connection. The first connector includes a support portion and an insertion portion connected to each other. The support portion is located in the first groove segment, and the insertion portion is located at the end of the support portion facing the second groove segment. The second connector is located in the second end connection and has a connecting groove. The insertion portion is inserted into the connecting groove. A water-stopping element is provided on the outer wall of the insertion portion and / or the inner wall of the connecting groove. The water-stopping element has the characteristic of expanding upon contact with water, and can rapidly expand when in contact with water to fill the tiny gaps between the insertion portion and the inner wall of the connecting groove, thereby improving the waterproof performance between the first end connection and the second end connection. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the underground continuous wall joint structure according to an embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram of the underground continuous wall joint structure when the water-stopping component expands upon contact with water, as described in this embodiment of the utility model.

[0025] Figure 3 This is a schematic diagram of the first groove segment structure according to an embodiment of the present utility model;

[0026] Figure 4 This is a schematic diagram of the second groove section structure described in an embodiment of the present invention.

[0027] In the picture:

[0028] 1. First groove section; 11. First end connection; 12. Reinforcing steel structure; 2. Second groove section; 21. Second end connection; 211. First plate; 212. Second plate; 3. First connector; 31. Support; 32. Insertion; 4. Second connector; 41. Connecting groove; 5. Water stop. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] like Figures 1-4 As shown, this utility model provides a joint structure for a diaphragm wall, including a first groove segment 1, a second groove segment 2, a first connector 3, and a second connector 4. One end of the first groove segment 1 is provided with a first end connection 11, and one end of the second groove segment 2 is provided with a second end connection 21, which is connected to the first end connection 11. The first connector 3 includes a support portion 31 and an insertion portion 32 connected to each other. The support portion 31 is located in the first groove segment 1, and the insertion portion 32 is located at the end of the support portion 31 facing the second groove segment 2. The second connector 4 is located in the second end connection 21 and has a connecting groove 41, into which the insertion portion 32 is inserted.

[0034] Specifically, a water-stopping element 5 is provided on the outer wall of the insertion part 32 and / or the inner wall of the connecting groove 41. For example... Figure 2 As shown, the water-stopping component 5 has the characteristic of expanding when exposed to water. It can expand rapidly when in contact with water, filling the tiny gap between the insert part 32 and the inner wall of the connecting groove 41, thereby improving the waterproof performance between the first end part 11 and the second end part 21.

[0035] In this embodiment, both the outer wall of the insert part 32 and the inner wall of the connecting groove 41 are provided with water-stopping elements 5. The water-stopping elements 5 on the outer wall of the insert part 32 and the inner wall of the connecting groove 41 can expand rapidly when in contact with water. After the two water-stopping elements 5 expand, they come into contact with each other, which can better fill the tiny gap between the insert part 32 and the inner wall of the connecting groove 41, thereby improving the waterproof performance between the first end joint 11 and the second end joint 21.

[0036] In other embodiments, the water-stopping element 5 can be provided only on the outer wall of the insert portion 32, or only on the inner wall of the connecting groove 41. Since the water-stopping element 5 has the property of expanding when exposed to water, even if only one water-stopping element 5 is provided, it can quickly expand and fill the tiny gap between the insert portion 32 and the inner wall of the connecting groove 41 when exposed to water, thereby improving the waterproof performance between the first end portion 11 and the second end portion 21.

[0037] Optionally, the length of the water-stopping element 5 extending along the outer wall of the insert portion 32 or the inner wall of the connecting groove 41 is not less than the height of the first groove segment 1 and the second groove segment 2. That is, the water-stopping element 5 can completely fill the gap between the insert portion 32 and the inner wall of the connecting groove 41 along the height direction of the first groove segment 1 and the second groove segment 2, further improving the waterproof performance between the first end joint 11 and the second end joint 21.

[0038] Furthermore, such as Figure 1 As shown, the first connector 3 and the second connector 4 are arranged in a one-to-one correspondence, with at least two of each. At least two first connectors 3 are sequentially arranged along the thickness direction of the first groove segment 1. Correspondingly, the second connectors 4 are sequentially arranged along the thickness direction of the second groove segment 2 at the second end joint 21. The one-to-one correspondence of at least two first connectors 3 and second connectors 4 ensures that multiple water-stopping elements 5 are arranged along the thickness directions of the first groove segment 1 and the second groove segment 2, further improving the waterproof performance between the first end joint 11 and the second end joint 21. Depending on the actual thickness of the first groove segment 1 and the second groove segment 2, the number of first connectors 3 can be set to two to four.

[0039] Specifically, such as Figure 1 and Figure 4 As shown, the second end joint 21 is a cross-shaped plate, including a first plate 211 and a second plate 212 connected to each other. The first plate 211 is located at one end of the second groove 2 facing the first groove 1, and the second plate 212 protrudes from the side of the first plate 211 facing the first groove 1. The first end joint 11 is a groove that mates with the second plate 212. Two second connecting members 4 are provided along the thickness direction of the second groove 2, and the second plate 212 is located between the two second connecting members 4. Correspondingly, two first connecting members 3 are provided along the thickness direction of the first groove 1, and two sets of water-stopping members 5 are provided along the thickness directions of the first groove 1 and the second groove 2. Both sets of water-stopping members 5, as well as the first end joint 11 and the second end joint 21, have a waterproof effect. The above structural design can further improve the waterproof performance between the first end joint 11 and the second end joint 21.

[0040] In this embodiment, the second end portion 21 is a cross-shaped steel plate, and both the first plate 211 and the second plate 212 are steel plates, with the first plate 211 perpendicular to the second plate 212. In other embodiments, the second end portion 21 can also be an I-beam, and the first end portion 11 can be connected to the I-beam.

[0041] Optionally, such as Figure 3 As shown, the first connector 3 is a T-shaped steel plate, the support part 31 is the web of the T-shaped steel plate, and the insertion part 32 is the flange of the T-shaped steel plate. The web is located in the first groove section 1, and the flange is inserted into the connecting groove 41. The T-shaped cross-section of the T-shaped steel plate provides greater bending stiffness, making the first connector 3 more stable under pressure, reducing local stress concentration, and improving the durability of the first connector 3. The T-shaped design also facilitates the insertion of the insertion part 32 of the first connector 3 into the connecting groove 41.

[0042] Furthermore, such as Figure 3 As shown, the first channel segment 1 also includes an internal steel reinforcement structure 12. The support part 31 of the first connector 3 is fixedly connected to the steel reinforcement structure 12, which improves the connection stability between the first channel segment 1 and the first connector 3. The connection between the support part 31 and the steel reinforcement structure 12 can be welding or wire binding, which will not be described in detail here.

[0043] Specifically, the connecting groove 41 has a first opening and a second opening at both ends along the height direction of the second groove segment 2, and a third opening facing the first groove segment 1, wherein the width of the third opening is less than the width of the bottom of the connecting groove 41. The insert part 32 is inserted into the connecting groove 41 through the first opening or the second opening, and the third opening allows the support part 31 to pass through the connecting groove 41. The width of the third opening is greater than the width of the support part 31 but less than the width of the insert part 32, which can confine the first connector 3 within the connecting groove 41, further enhancing the connection stability of the first connector 3 and the second connector 4.

[0044] In this embodiment, the water-stopping component 5 is a EPDM rubber seal. EPDM rubber seals have good water-swelling properties and can expand rapidly when in contact with water to fill the tiny gaps between the insert 32 and the inner wall of the connecting groove 41. In addition, the molecular structure of EPDM rubber seals is compact and has strong hydrophobicity, which can effectively block water penetration. It is especially suitable for long-term immersion or high humidity environments.

[0045] In other embodiments, the water-stopping element 5 may also be a seal made of water-swellable polyurethane grouting material or a highly absorbent polymer seal made of polyacrylic acid, without further limitation.

[0046] Optionally, a grouting channel is provided at the connection between the first end portion 11 and the second end portion 21. The grouting channel is used to inject waterproof grout after the first end portion 11 and the second end portion 21 are connected, so as to further improve the connection sealing between the first end portion 11 and the second end portion 21, thereby improving the waterproof performance between the first end portion 11 and the second end portion 21.

[0047] In this embodiment, the surfaces of the first end portion 11, the first connector 3, and the second connector 4 are all provided with a corrosion-resistant coating. In a humid underground environment, the corrosion-resistant coating can improve the corrosion resistance of the first end portion 11, the first connector 3, and the second connector 4, and further improve the durability of the underground continuous wall joint structure.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A diaphragm wall joint structure, characterized in that, include: The first groove segment (1) has a first end connector (11) at one end; The second groove segment (2) has a second end connection (21) at one end, and the second end connection (21) is connected to the first end connection (11). The first connector (3) includes a support portion (31) and an insert portion (32) connected to each other. The support portion (31) is disposed in the first groove segment (1), and the insert portion (32) is located at one end of the support portion (31) facing the second groove segment (2). The second connector (4) is disposed on the second end part (21). The second connector (4) is provided with a connecting groove (41). The insert part (32) is inserted into the connecting groove (41). The outer wall of the insert part (32) and / or the inner wall of the connecting groove (41) are provided with a water-stopping element (5).

2. The underground diaphragm wall joint structure according to claim 1, characterized in that, The length of the water-stopping component (5) is not less than the height of the first groove segment (1) and the second groove segment (2).

3. The underground diaphragm wall joint structure according to claim 1, characterized in that, The first connector (3) and the second connector (4) are one-to-one and at least two of each are provided. At least two of the first connectors (3) are arranged sequentially along the thickness direction of the first groove segment (1).

4. The underground diaphragm wall joint structure according to claim 1, characterized in that, The second end part (21) is a cross plate, including a first plate (211) and a second plate (212) connected to each other. The first plate (211) is connected to one end of the second groove (2) facing the first groove (1). The second plate (212) protrudes from the side of the first plate (211) facing the first groove (1). There are two second connecting members (4), and the second plate (212) is disposed between the two second connecting members (4).

5. The underground diaphragm wall joint structure according to claim 1, characterized in that, The first connector (3) is a T-shaped plate, the support part (31) is the web of the T-shaped plate, and the insertion part (32) is the flange of the T-shaped plate.

6. The underground diaphragm wall joint structure according to claim 1, characterized in that, The first groove section (1) also includes a steel reinforcement structure (12), and the support part (31) is fixedly connected to the steel reinforcement structure (12).

7. The underground diaphragm wall joint structure according to claim 1, characterized in that, The connecting groove (41) has a first opening and a second opening at both ends along the height direction of the second groove segment (2) and a third opening facing the first groove segment (1), and the width of the third opening is less than the width of the bottom of the connecting groove (41).

8. The underground diaphragm wall joint structure according to any one of claims 1-7, characterized in that, The water-stopping component (5) is a EPDM rubber seal.

9. The underground diaphragm wall joint structure according to any one of claims 1-7, characterized in that, A grouting channel is provided at the connection between the first end part (11) and the second end part (21), and the grouting channel is used to inject waterproof grout after the first end part (11) and the second end part (21) are connected.

10. The underground diaphragm wall joint structure according to any one of claims 1-7, characterized in that, The surfaces of the first end part (11), the first connector (3) and the second connector (4) are all provided with a corrosion-resistant coating.

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