Underground diaphragm wall bag type leaking stoppage device and construction method thereof

Abstract

The invention relates to an underground diaphragm wall bag type leaking stoppage device and a construction method thereof, and belongs to the technical field of underground diaphragm wall construction. Comprising a water stopping bag, a flow guide pipe, an air compressor, a valve needle and an air pipe. The water stopping bag is composed of a water stopping bag body and an air valve, the water stopping bag body is made of rubber materials and has the characteristics of abrasion resistance, puncture resistance and the like, and the air valve is a channel for inflating the bag body. The flow guide pipe is composed of a flow guide pipe body and a valve. The flow guide pipe body and the valve are both made of PVC materials. The water stopping bag is connected with the flow guide pipe, the flow guide pipe penetrates through a water stopping bag body, and the water stopping bag body is attached to the flow guide pipe and is sealed without air leakage. The air pipe is composed of an air pipe body, a pressure gauge and an air pressure valve. One end of the air pipe is connected to the air compressor, the other end of the air pipe is connected to the valve needle, and the valve needle is inserted into the valve of the water stopping bag body.

Description

Technical Field

[0001] The invention relates to an underground continuous wall bag-type plugging device and a construction method thereof, belonging to the technical field of underground continuous wall construction. Background Art

[0002] As an important form of support, underground continuous wall has both soil retaining and water-isolating effects, so it is widely used in deep foundation pit support projects. Due to the complexity of engineering geology and hydrogeology, the ground-connected wall often has mud or sand inside the wall during construction. When the foundation pit is excavated, the mud or sand will cause water and sand surges. If it cannot be sealed in time, it will cause soil erosion outside the foundation pit, ground subsidence, and serious damage to surrounding buildings.

[0003] In the prior art, CN115262651A discloses a local self-collapse water-stopping method for underground continuous walls, which determines the location of the collapsed hole outside the joint of two adjacent underground continuous walls, and vertically arranges at least one hole near the collapsed hole location. The projection of the collapsed hole is located within the range of the compressed soil between the joint and at least one hole, and the hole depth is greater than the seepage depth of the collapsed hole. The soil is compressed and fills the inner cavity of the collapsed hole, and the air lift cycle is used to pour mud plugging material into the air bag to fill the leveling hole. The above water-stopping method is cumbersome, time-consuming, labor-intensive, and material-intensive, and is not suitable for practical application.

[0004] Therefore, it is urgent to develop a device that can quickly stop leaks, which can be used to quickly stop leaks and prevent water from leaking when water seeps from the ground-connected wall, so as to avoid the occurrence of engineering accidents. Summary of the invention

[0005] In view of the defects of the above-mentioned prior art, the present invention proposes an underground continuous wall bag-type leak-proof device and a construction method thereof. When water seepage occurs in the underground continuous wall, the device can quickly stop the leak and avoid engineering accidents caused by water seepage in the underground continuous wall.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] An underground continuous wall bag type leak plugging device, comprising a water stop bag, a flow guide pipe, an air compressor, a valve needle and an air pipe;

[0008] The water-stop bag is composed of a water-stop bag body and a valve; one end of the air pipe is connected to the air compressor, and the other end is connected to the valve needle, and the valve needle is inserted into the valve of the water-stop bag body;

[0009] The water-stop bag is connected to the flow-guiding pipe, the flow-guiding pipe passes through the water-stop bag body, and the water-stop bag body is attached to the flow-guiding pipe and is airtight;

[0010] The water-stop bag is arranged at the leakage point of the underground continuous wall.

[0011] Furthermore, the flow guide pipe is composed of a flow guide pipe body and a valve.

[0012] Furthermore, the guide pipe body and the valve are both made of PVC material.

[0013] Furthermore, the valve on the diversion pipe is a water-stop valve.

[0014] Furthermore, the water-stopping bag body is made of rubber material and has wear-resistant and puncture-resistant properties, and the air valve is a channel for inflating air into the water-stopping bag body.

[0015] Furthermore, the trachea is composed of a trachea body and a first air pressure gauge and a first air pressure valve thereon.

[0016] Furthermore, a second air pressure gauge and a second air pressure valve are provided at the end of the air pipe body connected to the air compressor.

[0017] Furthermore, the valve needle consists of a valve needle head and a valve needle body.

[0018] The construction method of the underground continuous wall bag type plugging device comprises the following steps:

[0019] S1. Clean the leaking points on the underground continuous wall, clean the mud near the leaking points, and chisel off the irregular concrete to make the leaking points into a smooth curve shape;

[0020] S2. Open the valve of the guide pipe, put the bag-type plugging device into the leaking point, so that water can flow out of the guide pipe smoothly, connect the air compressor, valve needle and valve through the air pipe, inflate the water-stop bag body, make the outer wall of the water-stop bag body close to the leaking point, and stop inflating when the water-stop bag body can be stably fixed on the leaking point;

[0021] S3. Close the water stop valve on the diversion pipe, and inject cement-water-glass double slurry within 3m above and below the height of the leaking point outside the foundation pit. After the grouting is completed, let it stand for 72 hours;

[0022] S4, open the water stop valve of the diversion pipe. If no water flows out, it means that the leak is plugged successfully. Cut off the diversion pipe and smooth the leaking point with cement mortar. If water flows out, it means that the leak is plugged unsuccessfully. Repeat step S3 until no water flows out of the diversion pipe.

[0023] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0024] 1. Compared with the traditional leak-stopping technology, the technical solution of the present invention can quickly stop the leakage when the ground-connected wall leaks, shorten the rescue time, and avoid the risks of ground-connected wall deformation, ground subsidence, etc. caused by ground-connected wall leakage.

[0025] 2. The technical solution of the present invention can effectively reduce the input of manpower, machines and materials, and reduce the cost of emergency rescue of ground-connected wall leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The underground continuous wall bag type leak plugging device of the present invention;

[0027] Figure 2 The valve needle structure of the present invention;

[0028] Figure 3 The flow guide tube structure of the present invention;

[0029] Figure 4 It is a schematic diagram of leak plugging of the present invention. DETAILED DESCRIPTION

[0030] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will be combined with the appended drawings of the embodiments of the present invention. Figure 1-4 , the technical solutions in the embodiments are described clearly and completely. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0031] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Example 1

[0034] like Figure 1-4 As shown, an underground continuous wall bag type leak plugging device provided in this embodiment includes a water-stop bag, a guide pipe 2, an air compressor 4, a valve needle 5 and an air pipe.

[0035] like Figure 1 As shown, the water-stopping bag is composed of a water-stopping bag body 1 and an air valve 11 . The water-stopping bag body 1 is made of rubber material, and the air valve 11 is a channel for inflating air into the water-stopping bag body 1 .

[0036] One end of the air pipe is connected to the air compressor 4, and the other end is connected to the valve needle 5, and the valve needle 5 is inserted into the valve 11 of the water-stopping bag body 1. Figure 3 As shown in FIG. 1 , the trachea is composed of a trachea body 3 and a first air pressure gauge 32 and a first air pressure valve 31 thereon. Figure 1 As shown, the end of the trachea tube body 3 connected to the air compressor 4 is provided with a second air pressure gauge 41 and a second air pressure valve 42. Figure 2 As shown, the valve needle 5 is composed of a valve needle head 51 and a valve needle body 52 .

[0037] The water-stop bag is connected with the flow-guiding pipe 2, and the flow-guiding pipe 2 passes through the water-stop bag body 1. The water-stop bag body 1 is attached to the flow-guiding pipe 2 and is airtight. The flow-guiding pipe 2 is composed of a flow-guiding pipe body 21 and a valve. The flow-guiding pipe body 21 and the valve are both made of PVC material. The valve on the flow-guiding pipe 2 is a water-stop valve 22.

[0038] like Figure 4 As shown, the water-stop bag of this embodiment is arranged at the leakage point of the underground continuous wall.

[0039] Example 2

[0040] The construction method of an underground continuous wall bag type plugging device of the above-mentioned embodiment 1 comprises the following steps:

[0041] S1. Clean the leaking points on the underground continuous wall, clean up the mud near the leaking points, chisel off the irregularly shaped concrete, and clean up the shape of the leaking points into a smooth curve.

[0042] S2. Open the valve of the guide pipe 2, put the bag-type leak-proof device into the leaking point, so that water can flow out of the guide pipe 2 smoothly, connect the air compressor, valve needle 5 and valve 11 through the air pipe, inflate the water-stop bag body 1, make the outer wall of the water-stop bag body 1 close to the leaking point, and stop inflating when the water-stop bag body 1 can be stably fixed on the leaking point.

[0043] Specifically, close the second air pressure valve 42 and the first air pressure valve 31, start the air compressor 4, inflate the air pressure in the air compressor 4 to 0.2MPa, the second air pressure gauge 41 displays 0.2MPa, open the second air pressure valve 42, slowly open the first air pressure valve 31, gradually inflate the water-stopping bag body 1, wait until the air pressure of the water-stopping bag body 1 is 0.06MPa-0.1MPa, close the first air pressure valve 31, and the first air pressure gauge 32 displays 0.06MPa-0.1MPa. At this time, the water-stopping bag body 1 can just be stuck in the water leakage point of the ground-connected wall.

[0044] S3. Close the water stop valve 22 on the diversion pipe 2, and inject cement-water-glass double slurry within 3m above and below the height of the leakage point outside the foundation pit. After the grouting is completed, let it stand for 72 hours.

[0045] S4, open the water stop valve 22 of the diversion pipe, if no water flows out, it means the plugging is successful, cut off the diversion pipe 2, and smooth the leaking point with cement mortar. If water flows out, it means the plugging fails, repeat step S3 until no water flows out of the diversion pipe 2.

[0046] The above is only a preferred embodiment of the present invention, and does not impose any formal limitation on the structure of the present invention. The layout type and the number of uses of the present invention are not limited to this example, and can be optimized and selected according to the actual project. Any modification, equivalent change and decoration of the above embodiment based on the technical principle of the present invention that does not deviate from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An underground continuous wall bag type leak plugging device, characterized in that: It comprises a water-stop bag, a flow guide pipe (2), an air compressor (4), a valve needle (5) and an air pipe; The water-stop bag is composed of a water-stop bag body (1) and a valve (11); one end of the air pipe is connected to the air compressor (4), and the other end is connected to the valve needle (5); the valve needle (5) is inserted into the valve (11) of the water-stop bag body (1); The water-stopping bag is connected to the flow-guiding pipe (2), the flow-guiding pipe (2) passes through the water-stopping bag body (1), and the water-stopping bag body (1) is attached to the flow-guiding pipe (2) and is airtight; The water-stop bag is arranged at the leakage point of the underground continuous wall (6).

2. The underground continuous wall bag type plugging device according to claim 1 is characterized in that: The flow guide pipe (2) is composed of a flow guide pipe body (21) and a valve.

3. The underground continuous wall bag type plugging device according to claim 2 is characterized in that: The guide pipe body (21) and the valve are both made of PVC material.

4. The underground continuous wall bag type plugging device according to claim 2 is characterized in that: The valve on the flow guide pipe (2) is a water-stop valve (22).

5. The underground continuous wall bag type plugging device according to claim 1 is characterized in that: The water-stopping bladder body (1) is made of rubber material and has wear-resistant and puncture-resistant properties. The air valve (11) is a channel for inflating air into the water-stopping bladder body (1).

6. The underground continuous wall bag type plugging device according to claim 4, characterized in that: The trachea is composed of a trachea body (3) and a first air pressure gauge (32) and a first air pressure valve (31) thereon.

7. The underground continuous wall bag type plugging device according to claim 6 is characterized by: A second air pressure gauge (41) and a second air pressure valve (42) are provided at the end of the air pipe body (3) connected to the air compressor (4).

8. The underground continuous wall bag type plugging device according to claim 7 is characterized by: The valve needle (5) is composed of a valve needle head (51) and a valve needle body (52).

9. A construction method of an underground continuous wall bag type plugging device according to claim 8, characterized in that: The steps include: S1. Clean the leaking points on the underground continuous wall, clean the mud near the leaking points, and chisel off the irregular concrete to make the leaking points into a smooth curve shape; S2, open the valve of the guide pipe (2), place the bag-type leak-proof device into the leaking point, so that water can flow out smoothly from the guide pipe (2), connect the air compressor, the valve needle (5) and the valve (11) through the air pipe, inflate the water-stopping bag body (1), make the outer wall of the water-stopping bag body (1) close to the leaking point, and stop inflating when the water-stopping bag body (1) can be stably fixed on the leaking point; S3, close the water stop valve (22) on the guide pipe (2), inject cement-water-glass double slurry within 3m above and below the height of the leak point outside the foundation pit, and after the grouting is completed, let it stand for 72 hours; S4, open the water stop valve (22) of the guide pipe. If no water flows out, it means that the leak is blocked successfully. Cut off the guide pipe (2) and smooth the leaking point with cement mortar. If water flows out, it means that the leak is blocked unsuccessfully. Repeat step S3 until no water flows out of the guide pipe (2).

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