Connecting channel construction dewatering device

Abstract

The utility model discloses a connecting channel construction dewatering device in the field of tunnel engineering, which comprises dewatering wells arranged in a soil body between a tunnel left line and a tunnel right line, at least three dewatering wells are arranged on one side of a shield connecting channel, the three dewatering wells are arranged in a triangular shape, and the depths of the three dewatering wells are all below an excavation face; the well casing is arranged in the dewatering well; the drainage structure has the advantages that the plurality of dewatering wells are arranged and the depth of the dewatering wells is set below the excavation face, underground water in the shield connection channel can be effectively drained, it is effectively guaranteed that no accumulated water and no flowing water exist on the excavation face, the construction progress is guaranteed, the well pipe is detachably arranged and can be repeatedly used, and the construction cost is reduced. And the use cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of tunnel engineering, specifically to a dewatering device for construction of connecting passages. Background Technology

[0002] During excavation, the presence of groundwater can significantly impact construction safety and project quality. To ensure smooth excavation, effective drainage measures must be implemented, one of which is the installation of dewatering wells. Dewatering wells extract groundwater to lower the water table at the excavation site, thereby ensuring construction is carried out under dry conditions.

[0003] The working principle of dewatering wells is mainly to drill one or more wells on the ground, draw groundwater into the wells, and use pumps to extract the groundwater to the outside, thereby lowering the groundwater level. However, sometimes there are dense buildings on both sides of the tunnel above the shield tunnel section, making it impossible to arrange dewatering wells on both sides of the line using conventional methods. This results in dewatering wells only being able to be installed between the shield tunnel sections, such as... Figure 5 As shown.

[0004] The existing dewatering wells installed between shield tunnel sections are unable to effectively solve the problems of surface water and water flow during excavation due to issues with drilling depth and layout, thus affecting the construction progress.

[0005] Therefore, we propose a dewatering device for the construction of connecting passages. Summary of the Invention

[0006] To address the aforementioned shortcomings of existing technologies, this utility model provides a dewatering device for the construction of connecting passages.

[0007] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0008] A dewatering device for the construction of a connecting passage includes: a dewatering well, which is opened in the soil between the left line and the right line of the tunnel, with at least three dewatering wells on one side of the shield tunnel, the three dewatering wells on each side being arranged in a triangular shape and reaching a depth below the excavation surface; and a well pipe, which is inserted into the dewatering well along the axis of the dewatering well to discharge groundwater that seeps into the dewatering well.

[0009] By increasing the number of dewatering wells on one side of the shield tunnel from one to three, and arranging them in a triangular shape, a larger area of ​​the tunnel floor can be drained. Furthermore, by extending the wells to a depth below the excavation face, the project can effectively ensure that there is no water accumulation or flow at the excavation face, thus effectively solving the problem of construction progress being affected by the difficulty in lowering the groundwater level.

[0010] Furthermore, the depth of the dewatering wells must be at least 1 meter below the excavation surface; this depth ensures effective drainage of accumulated water and flowing water from the excavation surface.

[0011] Further defined, the well pipe includes a water inlet pipe and a filter pipe. The filter pipe is detachably connected to the bottom of the water inlet pipe, and the filter pipe 22 is located at the bottom of the dewatering well 1. By placing the filter pipe at the bottom of the dewatering well, groundwater in the soil outside the dewatering well can enter the well pipe through the filter pipe and be pumped out by the water pump. The filter pipe can also prevent impurities from entering the well pipe and clogging the water pump.

[0012] Further defining the water pipe, it includes multiple first connecting sections. Each first connecting section has a stepped first connecting hole recessed outward on the inner wall of its end. A connecting pipe is inserted into the first connecting hole. Adjacent first connecting sections are fixed by inserting the connecting pipe into the first connecting hole. Connecting two adjacent first connecting sections with the connecting pipe results in a simple structure and convenient connection. Compared with welding, it is more adaptable. This structure can be used on both steel pipes and reinforced concrete pipes. Moreover, compared with welding, it is detachable and recyclable, and the length can be spliced ​​at will, reducing the cost of use.

[0013] Furthermore, each first connecting segment is provided with mounting flanges on the top and bottom circumferential surfaces, and mounting holes are provided on the mounting flanges. The two first connecting segments are also fixed by mounting bolts passing through the mounting holes. By providing mounting flanges on the top and bottom circumferential surfaces of the first connecting segments, the connection stability of the first connecting segments can be improved.

[0014] Further defining the filter pipe, it includes multiple second connecting sections. Each second connecting section has a stepped second connecting hole recessed outward on the inner wall of its end. The inner diameter of the second connecting hole and the outer diameter of the connecting pipe are in clearance fit. Adjacent second connecting sections are also fixed by inserting the connecting pipe into the second connecting hole. Adjacent first connecting sections and second connecting sections are also fixed by inserting the connecting pipe into the first connecting hole and the second connecting hole. The second connecting sections are also fixed by inserting the connecting pipe. The structure is simple and easy to use.

[0015] Further, the second connecting section has several filter holes evenly distributed on its pipe wall, and the connecting pipes connecting adjacent second connecting sections also have filter holes. A filter cloth layer is wrapped around the outside of the pipe wall of the second connecting section. Hanging holes are provided on the top side wall of the uppermost second connecting section and the bottom side wall of the lowermost second connecting section. Hanging rods for hanging the filter cloth layer are threaded into the hanging holes. The filter cloth layer wrapped around the outer wall of the second connecting section also has a reinforcing and stabilizing effect on the connection structure of the second connecting section when it is wrapped around the second connecting section. By setting the hanging holes and threading the hanging rods into the hanging holes, it is convenient to hang the beginning and end of the wrapped filter cloth layer, which is convenient for winding and disassembling.

[0016] The beneficial effects of this utility model are as follows: by opening multiple dewatering wells and extending their depth below the excavation face, groundwater in the shield tunnel can be effectively drained, ensuring that there is no water accumulation or flow at the excavation face, thus guaranteeing the construction progress. Furthermore, the well pipes are detachable and reusable, saving on usage costs. Attached Figure Description

[0017] Figure 1 This is a top view of the present invention;

[0018] Figure 2 This is a side view of the present invention;

[0019] Figure 3 This is a simplified structural diagram of a water pipe.

[0020] Figure 4 This is a simplified structural diagram of a water filter pipe.

[0021] Figure 5 This is a top view of the existing technology.

[0022] The symbols for each component are as follows:

[0023] 1. Dewatering well, 2. Well pipe, 21. Water pipe, 21. First connecting section, 211. First connecting hole, 212. Mounting flange, 213. Mounting hole, 214. Filter pipe, 22. Second connecting section, 221. Second connecting hole, 222. Filter hole, 223. Filter cloth layer, 224. Hanging hole, 225. Hanging rod, 226. Connecting pipe, 23. Shield tunneling communication passage, 3. Detailed Implementation

[0024] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0025] Example:

[0026] like Figures 1-4As shown, a dewatering device for the construction of a connecting passage includes a dewatering well 1 and a well pipe 2. The dewatering well 1 is located in the soil between the left and right tunnel lines. At least three dewatering wells 1 are located on one side of the shield tunnel 3, arranged in a triangular shape, with each well reaching a depth of 1m below the excavation face. The well pipe 2 passes through the dewatering well 1 along its axial direction to drain the groundwater that seeps into the dewatering well 1. The well pipe 2 includes a water pipe 21 and a filter pipe 22. The filter pipe 22 is detachably connected to the bottom end of the water pipe 21 and is located at the bottom of the dewatering well 1. Water pipe 21 includes multiple first connecting sections 211. Each first connecting section 211 has a stepped first connecting hole 212 recessed outwards on its inner wall at the end. A connecting pipe 23 is inserted into the first connecting hole 212. Adjacent first connecting sections 211 are fixed by inserting the connecting pipe 23 into the first connecting hole 212. Each first connecting section 211 also has a mounting flange 213 on its top and bottom circumferential surfaces. The mounting flange 213 has mounting holes 214. Two first connecting sections 211 are fixed by mounting bolts passing through the mounting holes 214. Water filter pipe 22 includes... Multiple second connecting segments 221 are provided, each with a stepped second connecting hole 222 recessed outward on its inner wall at the end. The inner diameter of the second connecting hole 222 and the outer diameter of the connecting pipe 23 are in clearance fit. Adjacent second connecting segments 221 are fixed by inserting the connecting pipe 23 into the second connecting hole 222. Adjacent first connecting segments 211 and second connecting segments 221 are fixed by inserting the connecting pipe 23 into the first connecting hole 212 and the second connecting hole 222. A plurality of filter holes 223 are evenly provided on the pipe wall of the second connecting segment 221, connecting adjacent second connecting segments 211 and 221. The connecting pipe 23 of the connecting section 221 also has filter holes 223. A filter cloth layer 224 is wrapped around the outside of the pipe wall of the second connecting section 221. Hanging holes 225 are provided on the top side wall of the uppermost second connecting section 221 and the bottom side wall of the lowermost second connecting section 221. The hanging holes 225 are staggered from the second connecting holes 222. The hanging holes 225 are threaded with a hanging rod 226 for hanging the filter cloth layer 224. The hanging rod 226 is provided with a limit block to prevent the hanging rod 226 from being completely screwed into the second connecting section 221 and unable to be taken out.

[0027] By increasing the number of dewatering wells 1 on one side of the shield tunnel connecting passage 3 from one to three, arranged in a triangular shape, a wider drainage range of the tunnel floor can be achieved. Furthermore, by extending the wells to a depth below the excavation face, water accumulation and flow at the excavation face are effectively prevented, thus solving the problem of construction progress being affected by the difficulty in lowering the groundwater level. This depth of the dewatering wells 1 ensures effective drainage of accumulated and flowing water from the excavation face. By placing a filter pipe 22 at the bottom of the dewatering well 1, groundwater from the soil outside the well 1 enters the well pipe 2 through the filter pipe 22 and is then pumped out. The filter pipe 22 also prevents impurities from entering the well pipe 2 and clogging the pump. Connecting the two adjacent first connecting sections 211 via a connecting pipe 23 results in a simple structure, convenient connection, and better adaptability compared to welding fixation. Even better, this structure can be used on both steel pipes and reinforced concrete pipes, and compared to welding fixation, it is detachable and recyclable, and can be spliced ​​to any length, reducing the cost of use; by setting mounting flanges 213 on the top and bottom circumferences of the first connecting section 211, the connection stability of the first connecting section 211 can be improved; the second connecting section 221 is also fixed by inserting a connecting pipe 23, which is simple in structure and easy to use; a filter cloth layer 224 is wrapped around the outer wall of the second connecting section 221. When the filter cloth layer 224 is wrapped around the second connecting section 221, it will also have a reinforcing and stabilizing effect on the connection structure of the second connecting section 221. By setting a hanging hole 225, a hanging rod 226 is threaded into the hanging hole 225, which facilitates the hanging of the beginning and end of the wrapped filter cloth layer 224, making it convenient to wrap and disassemble.

Claims

1. A connecting passage construction dewatering device, characterized by, The application relates to a tunnel construction method. The application relates to a tunnel construction method. The application relates to a tunnel construction method.

2. The device according to claim 1, wherein, The application relates to a tunnel construction method.

3. The device according to claim 2, wherein, The application relates to a tunnel construction method.

4. The device according to claim 3, characterized in that, The application relates to a tunnel construction method.

5. The device according to claim 4, wherein, The application relates to a tunnel construction method.

6. The device according to claim 5, wherein, The application relates to a tunnel construction method.

7. The device according to claim 6, wherein, The application relates to a tunnel construction method. The application relates to a tunnel construction method. The application relates to a tunnel construction method. The application relates to a tunnel construction method. The application relates to a tunnel construction method. The application relates to a tunnel construction method. The application relates to a tunnel construction method. The application relates to a tunnel construction method. The application relates to a tunnel construction method. The application relates to a tunnel construction method. The application relates to a tunnel construction method. The application relates to a tunnel construction method. The application relates to a tunnel construction method. The application relates to a tunnel construction method. The application relates to a tunnel construction method. The application relates to a tunnel construction method. 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