Flexible joint structure at top of high-spraying stirring diaphragm wall

Abstract

The utility model discloses a flexible joint structure at the top of a high-pressure spraying stirring diaphragm wall, which is suitable for connecting the high-pressure spraying stirring diaphragm wall with a cast-in-place bottom plate of an upper hydraulic structure, extends along the axial direction of a wall body of the high-pressure spraying stirring diaphragm wall, and comprises a convex pile head arranged at the top of the high-pressure spraying stirring diaphragm wall, a top groove and a side face groove located in the upstream face are formed in the convex pile head, a copper sheet water stop fixed through sealing and filling mortar is arranged in the top groove, a water-swelling water stop strip is arranged in the side face groove, and flexible waterproof filler is arranged at the joint of the convex pile head and the cast-in-place bottom plate. The flexible joint structure at the top of the high-spraying stirring diaphragm wall is simple in structure, reliable in connection and convenient and fast to construct, and has wide application value in the field of water conservancy and hydropower engineering.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy construction, in particular to a flexible joint structure at the top of a high-pressure spraying and mixing anti-seepage wall. Background Art

[0002] The anti-seepage wall is a commonly used underground anti-seepage structure in water conservancy and hydropower projects, which plays an important role in ensuring the safety of the project and reliable operation. With the development of integrated spraying and mixing construction equipment and technology, high-pressure spraying and mixing anti-seepage walls are increasingly used in water conservancy projects, and the connection problem between the top and the bottom plate of the upper hydraulic structure is becoming more and more prominent. Most of the existing connection forms at the top of the anti-seepage wall require a groove to be reserved on the bottom plate of the upper hydraulic structure, and at the same time, a special-shaped beam needs to be set up on the top of the anti-seepage wall and reinforced. The construction process is complicated and the construction period is long. Summary of the invention

[0003] In order to solve the above problems, the utility model provides a flexible joint structure at the top of a high-pressure spraying and mixing anti-seepage wall with reliable connection and convenient construction. Specifically, the following technical solutions can be adopted:

[0004] The flexible joint structure at the top of the high-pressure spraying and mixing anti-seepage wall described in the utility model is suitable for connecting the high-pressure spraying and mixing anti-seepage wall with the cast-in-place base plate of the upper hydraulic structure. The flexible joint structure extends axially along the wall body of the high-pressure spraying and mixing anti-seepage wall, and includes a convex pile head arranged on the top of the high-pressure spraying and mixing anti-seepage wall. The convex pile head is provided with a top groove and a side groove located on the water-facing surface. A copper sheet waterstop fixed by sealing mortar is arranged in the top groove, and a waterstop strip that expands when exposed to water is arranged in the side groove. A flexible waterproof filler is arranged at the joint where the convex pile head connects with the cast-in-place base plate.

[0005] The top surface width of the convex pile head is at least 300 mm, and the height from the shoulder to the top surface is at least 500 mm.

[0006] C15 concrete cushion layers located at the bottom of the cast-in-place base plate are arranged on both sides of the convex pile head, and the bottom surface of the C15 concrete cushion layer is arranged at the same height as the shoulder of the convex pile head.

[0007] The flexible waterproof material is a closed-cell foam board, which is arranged in a single layer on the top and side surfaces of the convex pile head, and in a multi-layer arrangement at the shoulder of the convex pile head with the same height as the C15 concrete cushion layer.

[0008] The closed-cell foam board is divided into two upper and lower sections by the water-swelling waterstop strip.

[0009] The top groove is an inverted trapezoidal structure, the top surface of the sealing mortar is flush with the top surface of the top groove, one end of the copper sheet water stop is arranged on the sealing mortar, and the other end passes through the closed-cell foam board and extends upward.

[0010] Both ends of the copper sheet water stop are provided with 90° anti-slip bends, and the middle part of the copper sheet water stop is provided with an anti-deformation U-shaped bend located in the closed-cell foam board.

[0011] When the high-pressure spraying and mixing anti-seepage wall crosses the structural joints of the upper hydraulic structure, the water stop at the structural joints of the building extends downward and is fixedly connected to the copper sheet water stop T-joint.

[0012] The flexible joint structure at the top of the high-pressure spraying and mixing anti-seepage wall provided by the utility model has simple structure, reliable connection, and convenient construction, and has wide application value in the field of water conservancy and hydropower engineering.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] (1) No longer set up special-shaped beams, the "convex" structure at the top of the high-pressure spraying and mixing anti-seepage wall is embedded in the bottom plate of the upper hydraulic structure to increase the contact area, reduce the differential deformation caused by the different stiffness of the two, and improve the reliability of the connection between the two;

[0015] (2) A flexible copper sheet water stop is set on the top of the high-pressure spraying and mixing anti-seepage wall, which can adapt to a certain displacement and deformation to ensure the complete closure of the anti-seepage system between the anti-seepage wall and the bottom plate of the upper hydraulic structure;

[0016] (3) An expansion water stop strip is set on the upstream side of the top of the high-pressure concrete mixing anti-seepage wall to replace the water stop sheet to reduce damage to the top pile body;

[0017] (4) Flexible materials are set in the contact range between the "convex" structure on the top of the high-pressure spraying and mixing anti-seepage wall and the bottom plate of the upper hydraulic structure. After the copper sheet water stop on the top of the anti-seepage wall, the expansion water stop strip on the upstream side and the surrounding flexible materials are laid out, the upper hydraulic structure can be directly poured, which is convenient for construction and can ensure that the anti-seepage wall is closely connected with the upper hydraulic structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0019] The following is a detailed description of an embodiment of the utility model in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the utility model, and a detailed implementation method and a specific construction process are given, but the protection scope of the utility model is not limited to the following embodiment.

[0020] like Figure 1As shown, the flexible joint structure at the top of the high-pressure spraying and mixing anti-seepage wall described in the utility model is suitable for connecting the high-pressure spraying and mixing anti-seepage wall M with the cast-in-place bottom plate Q of the upper hydraulic structure. The flexible joint structure extends along the wall axial direction of the high-pressure spraying and mixing anti-seepage wall M, and includes a convex pile head 1 arranged on the top of the high-pressure spraying and mixing anti-seepage wall M. The top surface width of the convex pile head 1 is at least 300mm, and the height from the shoulder to the top surface is at least 500mm, so that the convex pile head 1 has sufficient contact area when embedded in the cast-in-place bottom plate Q of the upper hydraulic structure, reducing the differential deformation caused by the different stiffness of the two, and improving the reliability of the connection between the two. C15 concrete cushion layers 2 located at the bottom of the cast-in-place bottom plate Q of the hydraulic structure are also arranged on both sides of the convex pile head 1. The thickness of the C15 concrete cushion layer 2 is 100mm, and its bottom surface is arranged at the same height as the shoulder of the convex pile head 1.

[0021] A copper sheet waterproofing 3 is arranged between the top surface of the convex pile head 1 and the cast-in-place bottom plate Q of the hydraulic structure. Both ends of the copper sheet waterproofing 3 are provided with 90° anti-slip bends, one end is located in the top groove of the convex pile head 1, fixed by the sealing mortar 4, and the other end is poured into the cast-in-place bottom plate Q of the hydraulic structure; the copper sheet waterproofing 3 is provided with an anti-deformation U-shaped bend at the joint between the convex pile head 1 and the cast-in-place bottom plate Q, so that the connection structure can adapt to a certain displacement deformation, ensuring the complete closure of the high-pressure spraying and mixing anti-seepage wall M and the cast-in-place bottom plate Q of the upper hydraulic structure. Normally, the top groove is an inverted trapezoidal structure, and the top surface of the sealing mortar 4 therein is flush with the top surface of the top groove. When the high-pressure spraying and mixing anti-seepage wall M crosses the structural joint of the upper hydraulic structure, the building structure joint waterproofing 5 extends downward and is fixedly connected to the copper sheet waterproofing 3 by T-connection. A side groove is provided on the water-facing surface of the convex pile head 1, in which a water-swellable water-stop strip 6 is arranged, which can replace the traditional water-stop sheet and reduce the damage to the top pile body.

[0022] A flexible waterproof filler composed of a closed-cell foam board 7 is also provided at the joint between the convex pile head 1 and the cast-in-place bottom plate Q. The closed-cell foam board 7 is provided in a single layer on the top and side surfaces of the convex pile head 1, and in a multi-layer arrangement at the shoulder of the convex pile head 1 at the same height as the C15 concrete cushion layer 2. The closed-cell foam board 7 is divided into two sections, upper and lower, when passing through the water-expanding water stop strip 6, and is divided into two sections, left and right, when passing through the anti-deformation U-shaped bend of the copper sheet water stop 3.

[0023] During construction, the utility model is carried out according to the following steps:

[0024] 1) After the high-pressure spraying and mixing anti-seepage wall M is poured, its top is cut into a "convex" pile head 1, with a top width of not less than 300mm and a height of not less than 500mm;

[0025] 2) A water-swellable waterstop strip 6 is provided on the upstream side of the "convex" pile head 1 along the axis of the anti-seepage wall;

[0026] 3) A groove is made on the top of the "convex" pile head 1 to bury the copper sheet water stop 3, and a high-grade mortar is used to seal the groove, that is, the sealing mortar 4 is used to fix the root of the copper sheet water stop 3; when the high-pressure spraying and mixing anti-seepage wall M crosses the structural joint of the upper hydraulic structure, the structural joint water stop 5 of the building is extended downward and fixedly connected with the copper sheet water stop 3 by T-connection;

[0027] 4) Lay a single layer of closed-cell foam board 7 on the top and side of the "convex" pile head 1 to fill the seams, and lay a multi-layer closed-cell foam board 7 on the shoulder of the "convex" pile head 1 to fill the seams;

[0028] 5) Cast the bottom slab Q of the upper hydraulic structure.

[0029] It should be noted that, in the description of the present invention, terms indicating orientation or positional relationships, such as "front", "rear", "left", "right", "vertical", "horizontal", "inside", "outside", etc., are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

Claims

1. A flexible joint structure at the top of a high-pressure spraying and mixing anti-seepage wall, suitable for connecting the high-pressure spraying and mixing anti-seepage wall with the cast-in-place bottom plate of the upper hydraulic structure, characterized in that: The flexible joint structure extends axially along the wall of the high-pressure spraying and mixing anti-seepage wall, and includes a convex pile head arranged on the top of the high-pressure spraying and mixing anti-seepage wall. The convex pile head is provided with a top groove and a side groove located on the water-facing side. A copper sheet water stop fixed by sealing mortar is arranged in the top groove, and a water-swelling water stop strip is arranged in the side groove. A flexible waterproof filler is arranged at the joint where the convex pile head connects with the cast-in-place base plate.

2. The flexible joint structure at the top of the high pressure spraying and mixing anti-seepage wall according to claim 1 is characterized in that: The top surface width of the convex pile head is at least 300 mm, and the height from the shoulder to the top surface is at least 500 mm.

3. The flexible joint structure at the top of the high pressure spraying and mixing anti-seepage wall according to claim 1 is characterized in that: C15 concrete cushion layers located at the bottom of the cast-in-place base plate are arranged on both sides of the convex pile head, and the bottom surface of the C15 concrete cushion layer is arranged at the same height as the shoulder of the convex pile head.

4. The flexible joint structure at the top of the high pressure spraying and mixing anti-seepage wall according to claim 3 is characterized by: The flexible waterproof filler adopts a closed-cell foam board, and the closed-cell foam board is arranged in a single layer on the top and side surfaces of the convex pile head, and the closed-cell foam board is arranged in a multi-layer manner at the shoulder of the convex pile head with the same height as the C15 concrete cushion layer.

5. The flexible joint structure at the top of the high pressure spraying and mixing anti-seepage wall according to claim 4 is characterized in that: The closed-cell foam board is divided into two upper and lower sections by the water-swelling waterstop strip.

6. The flexible joint structure at the top of the high pressure spraying and mixing anti-seepage wall according to claim 4 is characterized in that: The top groove is an inverted trapezoidal structure, the top surface of the sealing mortar is flush with the top surface of the top groove, one end of the copper sheet water stop is arranged on the sealing mortar, and the other end passes through the closed-cell foam board and extends upward.

7. The flexible joint structure at the top of the high pressure spraying and mixing anti-seepage wall according to claim 6 is characterized in that: Both ends of the copper sheet water stop are provided with 90° anti-slip bends, and the middle part of the copper sheet water stop is provided with an anti-deformation U-shaped bend located in the closed-cell foam board.

8. The flexible joint structure at the top of the high pressure spraying and mixing anti-seepage wall according to claim 1 is characterized by: When the high-pressure spraying and mixing anti-seepage wall crosses the structural joints of the upper hydraulic structure, the water stop at the structural joints of the building extends downward and is fixedly connected to the copper sheet water stop T-joint.

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