Precipitation tube well for deep foundation pit of subway station

Abstract

The utility model discloses a downcast tube well for a deep foundation pit of a subway station. The downcast tube well comprises a well pipe, and a water filter pipe and a precipitation pipe which are sequentially arranged at the lower end of the well pipe, a well ring is arranged at the top of the well casing; a mesh section is arranged on the water filter pipe, and nylon mesh cloth and a fastening sleeve clamped with the nylon mesh cloth are arranged outside the water filter pipe in a sleeving manner; a sludge collecting hopper is arranged in the precipitation pipe, and a first inhaul cable extending out of the well casing is connected to the sludge collecting hopper; the water purification device is reasonable in structural design, stable and efficient in water purification effect, favorable for improving the construction efficiency of the subway station deep foundation pit and suitable for popularization and use.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit construction, and particularly relates to a dewatering pipe well for a deep foundation pit of a subway station. Background Technique

[0002] Huishilu Subway Station in Ningbo is located at the intersection of Jiwang Road and Huitu Road, running east-west along Huitu Road. The current width of Huitu Road is about 28m, and the current width of Jiwang Road in the north-south direction is about 6m. During the use of the foundation pit, the excavation depth is generally lower than the groundwater level. To ensure the safety of earth excavation and subsequent construction operations, measures need to be taken to drain and dewater the groundwater. Considering the hydrogeological conditions of the site, the area of the foundation pit, the excavation depth, the permeability of each soil layer, etc., light well point dewatering, jet well point dewatering, pipe well point, combined dewatering and pressure relief inside and outside the pit are usually used for foundation pit dewatering. Among them, pipe well point dewatering is suitable for strata with rich groundwater, and has the characteristics of large drainage volume, large depth, wide range, etc., and is the most commonly used dewatering method at present.

[0003] However, the existing dewatering pipe wells are generally connected by welding, which is difficult for hoisting and installation, and the integral pipe well structure is not conducive to later cleaning and maintenance. Content of the Utility Model

[0004] In view of the above existing technical problems, the utility model provides a dewatering pipe well for a deep foundation pit of a subway station.

[0005] The technical solution of the utility model is: a dewatering pipe well for a deep foundation pit of a subway station, including a well pipe, a filter pipe and a sedimentation pipe sequentially arranged at the lower end of the well pipe; a well ring sleeved at the top of the well pipe is threadedly connected with the well pipe through a thread sleeve, an anchoring hole is arranged on the well ring, and a protective net plate is movably clamped at the central position of the well ring;

[0006] The filter pipe is provided with a mesh hole section, a nylon mesh cloth is sleeved outside the filter pipe and corresponding to the mesh hole section, and fastening sleeves are sleeved at both the upper and lower ends of the nylon mesh cloth outside the filter pipe; the two fastening sleeves are respectively movably connected with the filter pipe and the nylon mesh cloth through bolts;

[0007] A sludge collection hopper is movably arranged inside the sedimentation pipe, and a first cable extending outside the well pipe is movably connected to the sludge collection hopper.

[0008] Furthermore, the well pipe, the filter pipe and the sedimentation pipe are respectively threadedly connected; one end of the well pipe, the filter pipe and the sedimentation pipe is provided with a tapered thread sleeve, and the other end is provided with a tapered internal thread hole threadedly connected with the tapered thread sleeve;

[0009] Description: The well pipe, filter pipe and sedimentation pipe connected by threads are convenient for installation and disassembly, and are convenient for secondary utilization; by providing a tapered thread sleeve at one end of the well pipe, filter pipe and sedimentation pipe, it is convenient to guide the well pipe, filter pipe and sedimentation pipe during installation, improving the installation efficiency.

[0010] Furthermore, anti-loosening balls are provided through compression springs at the ends of the well pipe, filter pipe and sedimentation pipe and outside the corresponding tapered thread sleeves; at one end of the well pipe, filter pipe and sedimentation pipe away from the corresponding tapered thread sleeve, a card slot for movably engaging with the anti-loosening balls is provided.

[0011] Description: By providing anti-loosening balls at the ends of the well pipe, filter pipe and sedimentation pipe and card slots for cooperating with the anti-loosening balls, it is beneficial to improve the connection stability between the well pipe, filter pipe and sedimentation pipe, thereby improving the use reliability of the present utility model.

[0012] Furthermore, several sliding rods are equidistantly distributed on the outer wall of the filter pipe and outside the mesh section; several brush rings are equidistantly distributed outside the mesh section and are respectively slidably engaged with the respective sliding rods one by one; the brush rings are connected by a sleeve movably sleeved on the sliding rod; a second cable is provided on the brush ring at the top outside the mesh section and penetrates through the filter pipe and extends outside the well pipe; a return spring for abutting against the brush ring at the top outside the mesh section is sleeved on each sliding rod.

[0013] Description: During use, by pulling the second cable, the brush rings slide up and down along the sliding rods under the action of the return springs to clean the mesh section, avoiding blockage of the mesh section and affecting the dewatering effect of the present utility model.

[0014] Furthermore, a connecting ring is movably engaged at the top inside the well pipe; the first cable and the second cable are respectively movably engaged with the connecting ring.

[0015] Description: By providing a connecting ring at the top of the well pipe, it is convenient to fix the first cable, the second cable and the pipeline extending into the well pipe.

[0016] The usage method of the present utility model is as follows:

[0017] During use, the well pipe, filter pipe and sedimentation pipe are sequentially connected by threads to form a dewatering well pipe, and then the dewatering well pipe is placed into the borehole of the dewatering well and kept upright; the well ring is connected to the top of the well pipe through a thread sleeve, and the well ring is fixed by inserting an anchor rod into the anchoring hole on the well ring; finally, the water pump and the water pipe are inserted into the sedimentation pipe through the well pipe, and the groundwater enters the sedimentation pipe through the mesh section on the filter pipe; the pumped water is pumped out of the dewatering well pipe by the water pump; the sludge collected in the sedimentation pipe is collected by a sludge collection hopper, and the sludge in the sludge collection hopper is regularly cleaned through the first cable.

[0018] Compared with the prior art, the beneficial effects of the present utility model are embodied in the following aspects:

[0019] First, the structure of the present utility model is reasonably designed. The well pipe, filter pipe and sedimentation pipe are connected by threads, which improves the convenience during the transportation and installation of the dewatering well pipe, reduces the floor area during the construction process of the dewatering well pipe; meanwhile, the detachable dewatering well pipe has a high secondary utilization rate and reduces the construction cost;

[0020] Second, by arranging a brush ring at the mesh section of the filter pipe, the present utility model facilitates the regular cleaning of the mesh section, enabling the dewatering well pipe to always maintain an efficient dewatering effect and facilitating the smooth progress of the subway foundation pit construction;

[0021] Third, by arranging a sludge collection hopper inside the sedimentation pipe, the present utility model facilitates the cleaning of the sludge deposited inside the sedimentation pipe, thereby avoiding the influence of sludge accumulation inside the sedimentation pipe on the dewatering effect of the dewatering well pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the longitudinal sectional view of the present utility model;

[0023] Figure 2 is the connection schematic diagram of the well ring and the well pipe of the present utility model;

[0024] Figure 3 is the connection schematic diagram of the nylon mesh cloth and the filter pipe of the present utility model;

[0025] Figure 4 is the connection schematic diagram of the brush ring and the filter pipe of the present utility model;

[0026] Figure 5 is the distribution diagram of the anti - detachment balls of the present invention on the sedimentation pipe;

[0027] Wherein, 1 - well pipe, 10 - well ring, 100 - threaded sleeve, 101 - anchoring hole, 102 - protective mesh plate, 2 - filter pipe, 20 - mesh section, 21 - nylon mesh cloth, 22 - fastening sleeve, 23 - sliding rod, 230 - return spring, 24 - brush ring, 240 - sleeve connection, 25 - second cable, 3 - sedimentation pipe, 30 - sludge collection hopper, 31 - first cable, 4 - tapered threaded sleeve, 40 - anti - detachment ball, 5 - connection ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Embodiment 1

[0029] As Figure 1 、 2A kind of drain pipe well for the deep foundation pit of the subway station shown in the figure includes a well pipe 1, a filter pipe 2 and a sedimentation pipe 3 which are sequentially arranged at the lower end of the well pipe 1; a well ring 10 sleeved at the top end of the well pipe 1 is threadedly connected with the well pipe 1 through a thread sleeve 100, an anchoring hole 101 is arranged on the well ring 10, and a protective net plate 102 is movably clamped at the central position of the well ring 10;

[0030] As Figure 1 , 3 shown in the figure, a mesh hole section 20 is arranged on the filter pipe 2, a nylon mesh cloth 21 is sleeved outside the filter pipe 2 and at the position corresponding to the mesh hole section 20, and fastening sleeves 22 are sleeved at both the upper and lower ends of the filter pipe 2 outside the nylon mesh cloth 21; the two fastening sleeves 22 are respectively movably connected with the filter pipe 2 and the nylon mesh cloth 21 through bolts;

[0031] As Figure 1 shown in the figure, a sludge collection hopper 30 is movably arranged inside the sedimentation pipe 3, and a first cable 31 extending outside the well pipe 1 is movably connected to the sludge collection hopper 30.

[0032] Embodiment 2

[0033] The difference between this embodiment and Embodiment 1 is that:

[0034] As Figure 1 , 4 shown in the figure, the well pipe 1, the filter pipe 2 and the sedimentation pipe 3 are respectively threadedly connected; one end of the well pipe 1, the filter pipe 2 and the sedimentation pipe 3 is provided with a tapered thread sleeve 4, and the other end is provided with a tapered internal thread hole threadedly connected with the tapered thread sleeve 4.

[0035] Embodiment 3

[0036] The difference between this embodiment and Embodiment 2 is that:

[0037] As Figure 5 shown in the figure, anti - detachment balls 40 are arranged outside the corresponding tapered thread sleeves 4 at the ends of the well pipe 1, the filter pipe 2 and the sedimentation pipe 3 through compression springs; at the ends of the well pipe 1, the filter pipe 2 and the sedimentation pipe 3 far from the corresponding tapered thread sleeves 4, clamping grooves for movably clamping the anti - detachment balls 40 are arranged.

[0038] Embodiment 4

[0039] The difference between this embodiment and Embodiment 3 is that:

[0040] As Figure 2 , 4As shown, there are 4 sliding rods 23 equidistantly distributed on the outer wall of the filter pipe 2 and outside the mesh section 20. There are 6 brush rings 24 equidistantly distributed outside the mesh section 20 and respectively slidingly clamped with each sliding rod 23 in a one-to-one correspondence. The brush rings 24 are connected by a sleeve 240 movably sleeved on the sliding rod 23. A second cable 25 is provided on the brush ring 24 at the top outside the mesh section 20, passing through the filter pipe 2 and extending into the outside of the well pipe 1. A return spring 230 is sleeved on each sliding rod 23 and abuts against the brush ring 24 at the top outside the mesh section 20.

[0041] Example 5

[0042] The difference between this example and Example 4 is that:

[0043] As Figure 2 shown, a connecting ring 5 is movably clamped at the top inside the well pipe 1. The first cable 31 and the second cable 25 are respectively movably clamped with the connecting ring 5.

Claims

1. A drainage pipe well for a deep foundation pit of a subway station, characterized in that: The invention comprises a well pipe (1), and a water filter pipe (2) and a sedimentation pipe (3) which are sequentially arranged at the lower end of the well pipe (1); a well collar (10) which is threadedly connected to the well pipe (1) through a threaded sleeve (100) is sleeved on the top end of the well pipe (1), an anchor hole (101) is arranged on the well collar (10), and a protective mesh plate (102) is movably connected to the center of the well collar (10); The water filter pipe (2) is provided with a mesh section (20), a nylon mesh cloth (21) is sleeved on the outside of the water filter pipe (2) and at a position corresponding to the mesh section (20), and fastening sleeves (22) are sleeved on the outside of the water filter pipe (2) and at both upper and lower ends of the nylon mesh cloth (21); the two fastening sleeves (22) are movably connected to the water filter pipe (2) and the nylon mesh cloth (21) respectively by bolts; A sludge collecting bucket (30) is movably arranged inside the sedimentation pipe (3), and a first pulling cable (31) extending out of the well pipe (1) is movably connected to the sludge collecting bucket (30).

2. A drainage pipe well for a deep foundation pit of a subway station according to claim 1, characterized in that: The well pipe (1), the water filter pipe (2) and the sedimentation pipe (3) are respectively threadedly connected; one end of the well pipe (1), the water filter pipe (2) and the sedimentation pipe (3) is provided with a tapered threaded sleeve (4), and the other end is provided with a tapered internal threaded hole threadedly connected to the tapered threaded sleeve (4).

3. A drainage pipe well for a deep foundation pit of a subway station according to claim 2, characterized in that: The ends of the well pipe (1), the water filter pipe (2) and the sedimentation pipe (3) and located outside the corresponding tapered threaded sleeve (4) are all provided with anti-slip balls (40) via compression springs; and the ends of the well pipe (1), the water filter pipe (2) and the sedimentation pipe (3) away from the corresponding tapered threaded sleeve (4) are all provided with a slot for movably engaging with the anti-slip balls (40).

4. A drainage pipe well for a deep foundation pit of a subway station according to claim 1, characterized in that: A plurality of slide bars (23) are evenly distributed on the outer wall of the water filter pipe (2) and outside the mesh section (20); a plurality of brush rings (24) are evenly distributed outside the mesh section (20) and are slidably engaged with the slide bars (23) one by one; the brush rings (24) are connected by sleeves (240) movably sleeved on the slide bars (23); a second cable (25) is provided on the brush ring (24) at the top end of the mesh section (20) and passes through the water filter pipe (2) and extends into the outside of the well pipe (1); and a return spring (230) is sleeved on each slide bar (23) and is in contact with the brush ring (24) at the top end of the mesh section (20).

5. A drainage pipe well for a deep foundation pit of a subway station according to claim 4, characterized in that: A connecting ring (5) is movably engaged at the top of the well pipe (1); the first cable (31) and the second cable (25) are movably engaged with the connecting ring (5) respectively.

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