Dewatering well structure

Abstract

The dewatering well structure comprises a foundation pit of a columnar structure, a vertically-arranged water suction pump is arranged in the foundation pit, a water drainage pipe is arranged at a water drainage opening in the top of the water suction pump, the water drainage pipe and the foundation pit are coaxially arranged, the water outlet end of the water drainage pipe extends out of the foundation pit, and the foundation pit is sequentially provided with a well pipe area and a filtering area from top to bottom. A well pipe is coaxially arranged in the well pipe area, the side wall of the well pipe is sealed and free of holes, the filtering area is provided with a filtering pipe which is coaxially arranged with the filtering area, holes are evenly distributed in the side wall of the filtering pipe, and a hole net component is arranged on the side wall of the filtering pipe. The problems that a reinforcement cage is large in reinforcement amount and high in construction cost, fine particles easily cross the reinforcement cage through gravel gaps to enter a tube well, the filtering effect is poor, a pump pipe is finally blocked, and the dewatering effect is affected are solved, and the device can be widely applied to the field of foundation pit construction.

Description

Technical Field

[0001] The utility model relates to the field of foundation pit construction, in particular to a dewatering well structure. Background Art

[0002] During foundation pit construction, water gushing may occur when the local foundation pit is excavated to the base. When water gushing occurs, a precipitation well should be set up in time. The existing common precipitation well structure uses a steel cage wrapped with a wire mesh, and then fills the outside of the wire mesh with a crushed stone filter layer, and sets a lifting pump inside the steel cage for precipitation. This method uses a large amount of steel bars in the steel cage, and has high construction costs. Small particles can easily pass through the gaps in the gravel and cross the steel cage into the pipe well, resulting in poor filtration effect, and eventually causing the pump pipe to be blocked, affecting the precipitation effect. The present application provides a precipitation well structure that can effectively solve this type of precipitation problem. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the above-mentioned background technology and to provide a precipitation well structure, so as to solve the problems that the steel cage uses a large amount of steel bars, the construction cost is high, and fine particles can easily pass through the gaps between gravel and cross the steel cage into the pipe well, resulting in poor filtering effect, and ultimately causing blockage of the pump pipe, thereby affecting the precipitation effect.

[0004] The utility model provides a precipitation well structure, including a foundation pit presenting a columnar structure, a vertically arranged water pump is provided in the foundation pit, a drainage pipe coaxially arranged with the foundation pit and with a water outlet extending out of the foundation pit is provided at the top drainage outlet of the water pump, the foundation pit is provided with a well pipe area and a filter area in sequence from top to bottom, the well pipe area is provided with a well pipe coaxially arranged therewith, the side wall of the well pipe is sealed without pores, the filter area is provided with a filter pipe coaxially arranged therewith and with pores evenly distributed on the side wall, and the side wall of the filter pipe is provided with a mesh component.

[0005] In the above technical solution, a clay ball protective wall composed of clay balls is coaxially arranged on the outside of the well pipe.

[0006] In the above technical solution, the mesh component arranged on the side wall of the filter tube includes a steel mesh and a nylon mesh coaxially arranged from the inside to the outside.

[0007] In the above technical solution, a sedimentation zone coaxially arranged at the bottom of the foundation pit is provided, and the sedimentation zone is connected to the bottom of the filtration zone.

[0008] In the above technical solution, a cavity of a columnar structure coaxially arranged with the filter tube is provided in the middle of the sedimentation zone, and an annular reverse filter layer is provided coaxially with the filter tube and the outer side of the cavity.

[0009] In the above technical solution, the mesh component includes 1 layer of 10-mesh steel wire mesh and 3 to 4 layers of 60-mesh nylon mesh.

[0010] In the above technical solution, the reverse filter layer is composed of mung bean sand.

[0011] In the above technical solution, the well pipe is a steel coil with a wall thickness of 4 mm and an outer diameter of 250 mm, the drainage pipe is a 300×3 mm steel coil or a drainage ditch, and the pores of the filter tube have a pore diameter of 18 mm and a hole spacing of 5 cm.

[0012] The utility model precipitation well structure has the following beneficial effects:

[0013] The utility model uses a small amount of steel bars and has a low construction cost. It is difficult for fine particles to pass through the gap between gravel and cross the filter pipe into the pipe well. The filtering effect is good and will not cause blockage of the pump pipe, thereby affecting the precipitation effect. Ultimately, the precipitation wells set up in foundation pits and other parts can achieve efficient precipitation through water pumps. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the precipitation well structure of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the filter pipe and mesh components in the precipitation well structure of the utility model. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but the embodiments should not be construed as limiting the present invention.

[0017] The structure of the precipitation well is as follows Figure 1 As shown: it includes a well pipe 6, a filter pipe 7, a sedimentation area 11, a water pump 2 and a drainage pipe 3, etc., which discharge the filtered groundwater into the drainage system pipe.

[0018] The utility model provides a dewatering well structure, in which a well section of a foundation pit 1 is provided with a well pipe area 4, a filtration area 5, a sedimentation area 11, a clay ball wall 8 and other functional areas. Figure 1In the depth of the foundation pit 1, the well pipe 6 is a steel coil with a wall thickness of 4mm, and the side wall is sealed without pores. The outside of the well pipe 6 is filled with clay balls to form a clay ball protective wall 8, which plays the role of protecting the wall and stopping water and preventing the upper well wall from collapsing. A filter area 5 is set below the depth of the foundation pit 1, which mainly plays a filtering role to prevent groundwater impurities from entering the water pump 2 and causing blockage. A filter pipe 7 is set in the filter area 5. The side wall of the filter pipe 7 is drilled with holes and the outside is wrapped with a mesh component. The mesh component includes a steel mesh 9 and a nylon mesh 10. The outside of the filter pipe 7 is filled with mung bean sand to form a ring. The filter layer 12 is set, and when the infiltrated water flows out, it will not take away the soil in the dam body or the foundation, thereby preventing the occurrence of pipe bursts and soil flow; a water pump 2 is set in the foundation pit 1, and the water pump 2 is connected to the drainage pipe 3. The drainage pipe 3 is supported by a steel pipe scaffolding (not shown in the figure), and is replaced alternately during the earth excavation process; the pipe section within 1m of the bottom of the foundation pit 1 is used as a sedimentation area 11, and the sedimentation area 11 plays a sedimentation role. Some particles can be deposited at the bottom after passing through the filtration area 5, and are a certain distance away from the water pump 2, so as to avoid blockage.

[0019] Description of precipitation well structure:

[0020] (1) The well pipe 6 is a steel coil with a wall thickness of 4 mm and an outer diameter of 250 mm, and the side wall is sealed without pores;

[0021] (2) The filter tube 7 has an outer diameter of 250 mm and a side wall with holes of 18 mm in diameter and a hole spacing of 5 cm (e.g. Figure 2 shown);

[0022] (3) The drainage pipe 3 is a 300×3mm steel coil pipe (or drainage ditch), the side wall of the drainage pipe 3 steel coil pipe is sealed without pores, and is welded. The support of the drainage pipe 3 in the pit adopts a steel pipe scaffolding, which is replaced alternately during the earth excavation process;

[0023] (4) The diameter of the clay ball is 20-40 mm, and the filter material is mung bean sand with a diameter of 2-3 mm.

[0024] (5) The filter tube 7 is wrapped with a layer of 10-mesh steel wire mesh 9 and three to four layers of 60-mesh nylon mesh 10 (such as Figure 2 shown).

[0025] Finally, the dewatering wells set up in the foundation pit 1 and other parts can achieve efficient dewatering through the pump 2.

[0026] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0027] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A drainage well structure, comprising a foundation pit (1) with a columnar structure, wherein a vertically arranged water pump (2) is provided in the foundation pit (1), and a drainage pipe (3) is provided at the drainage outlet on the top of the water pump (2) and is coaxially arranged with the foundation pit (1) and the water outlet end of the drainage pipe extends out of the foundation pit (1), characterized in that: The foundation pit (1) is provided with a well pipe area (4) and a filter area (5) in sequence from top to bottom; a well pipe (6) coaxially arranged therewith is provided in the well pipe area (4); the side wall of the well pipe (6) is sealed and has no pores; the filter area (5) is provided with a filter pipe (7) coaxially arranged therewith and with pores uniformly distributed on the side wall; and a mesh component is provided on the side wall of the filter pipe (7).

2. The precipitation well structure according to claim 1 is characterized in that: A clay ball protective wall (8) composed of clay balls and arranged coaxially therewith is provided on the outside of the well pipe (6).

3. The precipitation well structure according to claim 2 is characterized in that: The mesh component arranged on the side wall of the filter tube (7) comprises a steel mesh (9) and a nylon mesh (10) which are coaxially arranged from the inside to the outside.

4. The precipitation well structure according to claim 3 is characterized in that: The bottom of the foundation pit (1) is provided with a sedimentation area (11) coaxially arranged therewith, and the sedimentation area (11) is connected to the bottom of the filtration area (5).

5. The precipitation well structure according to claim 4 is characterized in that: A columnar cavity coaxially arranged with the filter tube (7) is provided in the middle of the sedimentation zone (11), and an annular reverse filter layer (12) is coaxially arranged with the filter tube (7) and the outer side of the cavity.

6. The precipitation well structure according to claim 5 is characterized in that: The mesh component comprises one layer of 10-mesh steel wire mesh (9) and 3 to 4 layers of 60-mesh nylon mesh (10).

7. The precipitation well structure according to claim 6 is characterized in that: The reverse filter layer (12) is composed of mung bean sand.

8. The precipitation well structure according to claim 7 is characterized in that: The well pipe (6) is a steel coil pipe with a wall thickness of 4 mm and an outer diameter of 250 mm. The drainage pipe (3) is a 300×3 mm steel coil pipe or a drainage ditch. The pores of the filter pipe (7) have a pore diameter of 18 mm and a hole spacing of 5 cm.

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