A seepage-proof structure for underground dewatering wells

Abstract

This utility model relates to the field of building construction technology, and in particular to a seepage-proof structure for basement dewatering wells. It includes a foundation pit and a basement dewatering well body. A leveling layer is provided within the foundation pit, and a well assembly is installed on the basement dewatering well body. The well assembly includes a steel pipe, basement fill concrete, and a sand layer at the bottom of the foundation pit. The steel pipe is adapted to and connected to the basement fill concrete and the sand layer at the bottom of the foundation pit. This utility model exhibits excellent seepage-proof performance. Through a multi-layer sealing design of "full welding of sealed steel plates + sealing with water-stopping putty + filling with basement fill concrete," combined with blind pipe drainage and pressure relief, it significantly reduces the risk of leakage in the basement fill concrete, ensuring a long-term dry environment for the basement. It also achieves efficient resource reuse, modifying the existing deep dewatering well's steel pipe and utilizing the existing well with blind pipes, eliminating the need for new drainage facilities, reducing resource waste and construction costs.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a seepage-proof structure for underground dewatering wells. Background Technology

[0002] With the continuous development of society and the continuous progress of science and technology, the technology related to building construction is also constantly improving. In the construction of underground garages, in order to ensure a dry environment for the excavation of the foundation pit and the construction of the foundation slab, it is necessary to carry out dewatering operations in the foundation pit with the help of dewatering wells. For example, multiple deep wells and lightweight wellpoint dewatering are often used for silty blocks.

[0003] Currently, after traditional construction is completed, the dewatering wells are usually directly sealed. However, after sealing, the residual water pressure under the base slab can easily cause stress concentration, which can lead to leakage problems in the base slab. This not only affects the use of the basement but also requires a lot of cost for repairs, which is not conducive to the use of the basement dewatering well channels. Utility Model Content

[0004] The purpose of this utility model is to solve the following shortcomings in the existing technology. Currently, after the traditional construction is completed, the dewatering well is usually directly sealed. However, after sealing, the residual water pressure under the bottom plate can easily cause stress concentration, which can lead to leakage problems in the bottom plate. This not only affects the use function of the basement, but also requires a lot of cost for maintenance, which is not conducive to the use of the basement dewatering well. Therefore, a seepage prevention structure for basement dewatering well is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A seepage-proof structure for a basement dewatering well includes a foundation pit and a basement dewatering well body. A foundation pit leveling layer is provided in the foundation pit, and a well assembly is provided on the basement dewatering well body. The well assembly includes a steel pipe, basement fill concrete, and a sand layer at the bottom of the foundation pit. The steel pipe is adapted to and connected to the basement fill concrete and the sand layer at the bottom of the foundation pit. A sealing assembly is provided above the steel pipe. The sealing assembly includes a sealing steel plate, which is welded to the top of the steel pipe. A waterproof assembly and a drainage assembly are provided on the shaft steel pipe.

[0006] Preferably, the waterproof component includes a waterproof membrane disposed on the outside of the steel pipe.

[0007] Preferably, a waterproof sealant is provided on one side of the waterproof membrane, and the waterproof sealant is provided at the joint between the waterproof membrane and the steel pipe.

[0008] Preferably, the drainage assembly includes a blind pipe disposed on the sand layer at the bottom of the foundation pit, the blind pipe being connected to the steel pipe at one end, which penetrates the sand layer at the bottom of the foundation pit.

[0009] Preferably, the outer side of the steel pipe is filled with bottom slab concrete, and the bottom slab concrete is located on the outside of the basement fill concrete.

[0010] Preferably, the steel pipe is provided with an outer steel plate, and the thickness of the outer steel plate is set to 8mm.

[0011] Compared with the prior art, the beneficial effects of this utility model are: With excellent anti-leakage performance, it adopts a multi-seal design of "full welding of closed steel plate + sealing with water-stop putty + filling with concrete for basement", combined with blind pipe drainage and pressure relief, which greatly reduces the risk of leakage of concrete for basement filling and ensures a long-term dry use environment for basement.

[0012] Efficient reuse of resources involves modifying the steel pipes of existing deep dewatering wells and installing blind pipes in the existing wells, eliminating the need for new drainage facilities, reducing resource waste and construction costs. For example, 75 wells with a depth of 12 meters in the original silty block can be directly reused. Attached Figure Description

[0013] Figure 1 This is a front structural diagram of an anti-seepage structure for a basement dewatering well channel proposed in this utility model. Figure 2 for Figure 1 A magnified view of part A in the image.

[0014] In the diagram: 1. Basement dewatering well body, 2. Sand layer at the bottom of the foundation pit, 3. Blind pipe, 4. Basement slab concrete, 5. Outer steel plate, 6. Basement fill concrete, 7. Sealing steel plate, 8. Water-stopping putty, 9. Steel pipe, 10. Foundation pit leveling layer, 11. Waterproofing membrane. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] The terms used in this utility model, such as "upper", "lower", "left", "right", "middle" and "one", are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0017] Reference Figures 1-2A seepage-proof structure for a basement dewatering well includes a foundation pit and a basement dewatering well body 1. A foundation pit leveling layer 10 is provided in the foundation pit. A well assembly is provided on the basement dewatering well body 1. The well assembly includes a steel pipe 9, basement fill concrete 6, and a sand layer 2 at the bottom of the foundation pit. The steel pipe 9 has a specification of Φ325×8mm. The steel pipe 9 is adapted to and connected with the basement fill concrete 6 and the sand layer 2 at the bottom of the foundation pit. Micro-expansion concrete is poured into the inside of the steel pipe 9 to fill the gaps by utilizing the micro-expansion characteristics of concrete, thereby enhancing the structural density and seepage resistance. A sealing assembly is provided above the steel pipe 9. The sealing assembly includes a sealing steel plate 7, which is welded to the top of the steel pipe 9. The sealing steel plate 7 is welded to ensure full sealing and waterproof integrity. Waterproofing components and drainage components are provided on the well steel pipe 9.

[0018] The waterproofing component includes a waterproofing membrane 11, which is installed on the outside of the steel pipe 9. A water-stopping putty 8 is installed on one side of the waterproofing membrane 11. The water-stopping putty 8 is installed at the joint between the waterproofing membrane 11 and the steel pipe 9. The water-stopping putty 8 is used for sealing, and the relevant components are hot-welded to the surface of the steel plate to further seal the leakage gaps and improve the waterproofing performance of the joint.

[0019] The drainage system includes a blind pipe 3 installed on the sand layer 2 at the bottom of the foundation pit. One end of the blind pipe 3 penetrates the sand layer 2 at the bottom of the foundation pit and is connected to the steel pipe 9, so that one end of the blind pipe 3 connects to the sand seepage area around the dewatering well pipe, and the other end extends to the basement sump, realizing the drainage of seepage water under the foundation slab and the release of water pressure stress. The sand layer 2 at the bottom of the foundation pit is filled around the dewatering well pipe. By utilizing the water permeability gaps of the sand particles, the seepage water can enter the blind pipe 3 more smoothly, improving drainage efficiency.

[0020] The outer side of the steel pipe 9 is filled with bottom slab concrete 4, which is located on the outside of the basement fill concrete 6. The steel pipe 9 is also surrounded by an outer steel plate 5 with a thickness of 8mm.

[0021] In this utility model, after the underground parking garage is put into use, if there is residual water pressure under the underground parking garage fill concrete 6, water will seep into the dewatering well area through the gaps between the sand particles. At this time, the blind pipe 3 at the bottom of the well can promptly divert the seepage water to the collection well, releasing the water pressure stress borne by the underground parking garage fill concrete 6, and avoiding water pressure concentration that could cause leakage at the joint between the bottom slab and the surrounding structure. At the same time, the "full welding and sealing of the closed steel plate 7 at the top of the well + sealing with water-stopping putty 8 + filling with micro-expansion underground parking garage fill concrete 6" form a multi-layer sealing defense line, effectively preventing external water from seeping into the underground parking garage, and achieving the synergistic effect of "water pressure stress release" and "leakage prevention". In addition, this structure makes full use of the existing deep dewatering well well steel pipe 9, transforming it into a stress release and drainage channel, thus continuing the functional value of the existing facilities.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing", etc., should be interpreted broadly. For example, they can refer to fixed connection, detachable connection, or integral connection; they can refer to mechanical connection or electrical connection; they can refer to direct connection or indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A seepage-proof structure for underground dewatering wells, comprising a foundation pit and an underground dewatering well body (1), characterized in that, The foundation pit is provided with a foundation pit leveling layer (10), and the basement dewatering well body (1) is provided with a well assembly. The well assembly includes a steel pipe (9), basement filling concrete (6) and foundation pit bottom sand layer (2). The steel pipe (9) is adapted to and connected with the basement filling concrete (6) and the foundation pit bottom sand layer (2). A sealing assembly is provided above the steel pipe (9), the sealing assembly includes a sealing steel plate (7), the sealing steel plate (7) is welded to the top of the steel pipe (9), and a waterproof assembly and a drainage assembly are provided on the well steel pipe (9).

2. The seepage-proof structure for underground dewatering wells according to claim 1, characterized in that, The waterproofing component includes a waterproofing plate (11), which is disposed outside the steel pipe (9).

3. The seepage-proof structure for underground dewatering wells according to claim 2, characterized in that, Water-stop putty (8) is provided on one side of the waterproof board (11), and the water-stop putty (8) is provided at the joint between the waterproof board (11) and the steel pipe (9).

4. The seepage-proof structure for underground dewatering wells according to claim 1, characterized in that, The drainage assembly includes a blind pipe (3) disposed on the sand layer (2) at the bottom of the foundation pit, the blind pipe (3) penetrating one end of the sand layer (2) at the bottom of the foundation pit and connected to the steel pipe (9).

5. A seepage-proof structure for a basement dewatering well as described in claim 1, characterized in that, The steel pipe (9) is filled with bottom slab concrete (4) on the outside, and the bottom slab concrete (4) is located on the outside of the basement fill concrete (6).

6. The seepage-proof structure for underground dewatering wells according to claim 1, characterized in that, The steel pipe (9) is provided with an outer steel plate (5), and the thickness of the outer steel plate (5) is set to 8mm.

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