CN214832823U

CN214832823U - Pressure-bearing dewatering well

Info

Publication number: CN214832823U
Application number: CN202120395660.XU
Authority: CN
Inventors: 廖建东; 邹薇; 李长太; 熊晓梅; 何钰; 黄清钦; 谢维; 陈其明; 高显
Original assignee: Ranken Railway Construction Group Co Ltd
Current assignee: Ranken Railway Construction Group Co Ltd
Priority date: 2021-02-23
Filing date: 2021-02-23
Publication date: 2021-11-23
Anticipated expiration: 2031-02-23

Abstract

The utility model discloses a pressure-bearing dewatering well, which comprises a dewatering well arranged in a foundation pit, wherein a dewatering pipe is arranged in the dewatering well, and the dewatering pipe comprises a well pipe, a filter pipe and a sand-settling pipe which are sequentially arranged from top to bottom; the filter pipe is provided with a plurality of filter holes, a filler layer is arranged between the precipitation pipe and the precipitation well, a water suction pump for pumping underground water is arranged in the filter pipe, the water suction pump is connected with a water outlet pipe, and the water outlet pipe extends to the outside of the precipitation well; compared with the traditional precipitation well, the pressure-bearing precipitation well is suitable for the occasions with large permeability coefficient, rich underground water and difficult solution of light well points; the drainage device has the advantages of large drainage, large precipitation depth and large precipitation range, and is simpler in structure, shorter in construction period and lower in construction cost.

Description

Pressure-bearing dewatering well

Technical Field

The utility model belongs to the technical field of the construction technology and specifically relates to a pressure-bearing precipitation well.

Background

In the existing building construction technology, precipitation well engineering is a method for reducing the groundwater level for excavation of foundation pits, so that construction is convenient. The dewatering well has the function of reducing the underground water level or draining the underground water, and the depth of the dewatering well is as deep as the dewatering requirement, even as large as fifty-six meters. The traditional precipitation well mainly comprises light well point precipitation and jet well point precipitation. The light well point dewatering is suitable for occasions with small foundation pit area and low water level reduction depth (3-6m), and has certain limitation; the pumping system for spraying well point precipitation and the spraying pipe well are complex, the operation failure rate is high, the energy loss is high, and the cost is high.

SUMMERY OF THE UTILITY MODEL

To complicated, the high and with high costs technical problem of fault rate of traditional precipitation well structure, the utility model provides a pressure-bearing precipitation well.

The utility model adopts the technical proposal that: the pressure-bearing dewatering well comprises a dewatering well arranged in a foundation pit, wherein a dewatering pipe is arranged in the dewatering well, and the dewatering pipe comprises a well pipe, a filter pipe and a sand settling pipe which are sequentially arranged from top to bottom; the filter pipe is provided with a plurality of filter holes, a packing layer is arranged between the precipitation pipe and the precipitation well, a water suction pump for pumping underground water is arranged in the filter pipe, the water suction pump is connected with a water outlet pipe, and the water outlet pipe extends to the outside of the precipitation well. The utility model discloses arrange the suction pump in the chimney filter, in the groundwater outside the precipitation tube got into the precipitation tube through the filtration pore on the chimney filter, the rethread suction pump was taken out from the foundation ditch. Even if the filter pipe is used, silt with small particles can enter the precipitation pipe through the filter holes along with the underground water. In order to prevent the suction pump from being blocked by excessive silt, a silt settling pipe is arranged for collecting and storing the silt. Compared with the traditional precipitation well, the pressure-bearing precipitation well is suitable for the occasions with large permeability coefficient, rich underground water and difficult solution of light well points; the drainage device has the advantages of large drainage, large precipitation depth and large precipitation range, and is simpler in structure, shorter in construction period and lower in construction cost.

Furthermore, the outer wall of the filter pipe is provided with a filter screen, so that silt with overlarge diameter is prevented from entering a well pipe from filter holes in the filter pipe to block a water pump.

Furthermore, the filter screen is made of nylon cloth, and has the advantages of low cost, good water filtering effect and easiness in construction.

Further, the packing layer comprises gravels, high-quality clay balls and clay which are sequentially arranged from bottom to top. The gravel is hard, so that the stability of the dewatering well and the connection of the water pipe can be well ensured; meanwhile, the gravel has high porosity, so that the underground water can penetrate through the gravel, enter the downcomer and be pumped out by the water pump. The high-quality clay balls play a role in blocking water and prevent underground water from overflowing out of the ground through the dewatering well. The clay also plays a role in water plugging, underground water is prevented from overflowing out of the ground through the dewatering well, the effect of the high-quality clay balls is better than that of the clay, but the price of the high-quality clay balls is higher than that of the clay, so that the clay can be adopted for replacing in a range close to an inlet; the construction cost is effectively reduced while the water plugging effect is ensured.

Furthermore, the filter pipe is connected with the well pipe and the sand settling pipe in a welding mode, so that the connection stability is ensured.

Further, the top of the downcomer is higher than the surface of the foundation pit. On one hand, the ground water can be prevented from flowing into the precipitation well; on the other hand, the soil body excavated at the periphery can be prevented from being covered due to improper operation in the excavation process; and can prevent foreign matters from falling into the precipitation well.

Furthermore, in view of construction cost and effect, the top of the downcomer is 400-600 mm higher than the surface of the foundation pit.

The utility model has the advantages that:

1. the pressure-bearing precipitation well is suitable for occasions with large permeability coefficient, rich underground water and difficult solution of light well points; the drainage device has the advantages of large drainage, large precipitation depth and large precipitation range, and is simpler in structure, shorter in construction period and lower in construction cost.

2. The utility model discloses be provided with the filter screen at the outer wall of chimney filter, prevent that the filtration pore entering well casing that the diameter is too big from on the chimney filter from blockking up the water pump.

3. The top of the precipitation pipe of the utility model is higher than the surface of the foundation pit, on one hand, ground water can be prevented from flowing into the precipitation well; on the other hand, the soil body excavated at the periphery can be prevented from being covered due to improper operation in the excavation process; and can prevent foreign matters from falling into the precipitation well.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Labeled as:

1. dewatering wells; 2. a well pipe; 3. a filter tube; 4. a water pump; 5. a water outlet pipe; 6. filtering with a screen; 7. a foundation pit; 8. a sand setting pipe;

101. gravel; 102. high-quality clay balls; 103. and (3) clay.

Detailed Description

In the description of the present invention, it should be noted that the terms "front", "upper", "lower", "left", "right", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be further explained with reference to the accompanying drawings.

Examples

Referring to fig. 1, the pressure-bearing precipitation well of the utility model comprises a precipitation well 1 arranged in a foundation pit 7, wherein a precipitation pipe is arranged in the precipitation well, and the precipitation pipe comprises a well pipe 2, a filter pipe 3 and a sand settling pipe 8 which are sequentially arranged from top to bottom; the filter pipe is provided with a plurality of filter holes (not shown in the figure), a packing layer is arranged between the precipitation pipe and the precipitation well, a water suction pump 4 for extracting underground water is arranged in the filter pipe, the water suction pump is connected with a water outlet pipe 5, and the water outlet pipe extends to the outside of the precipitation well. The utility model discloses arrange the suction pump in the chimney filter, in the groundwater outside the precipitation tube got into the precipitation tube through the filtration pore on the chimney filter, the rethread suction pump was taken out from the foundation ditch. Even if the filter pipe is used, silt with small particles can enter the precipitation pipe through the filter holes along with the underground water. In order to prevent the suction pump from being blocked by excessive silt, a silt settling pipe is arranged for collecting and storing the silt. Compared with the traditional precipitation well, the pressure-bearing precipitation well is suitable for the occasions with large permeability coefficient, rich underground water and difficult solution of light well points; the drainage device has the advantages of large drainage, large precipitation depth and large precipitation range, and is simpler in structure, shorter in construction period and lower in construction cost.

Referring to fig. 1, in this embodiment, a screen 6 is disposed on the outer wall of the filter tube to prevent silt with an excessively large diameter from entering the well pipe from the filter holes on the filter tube and blocking the water pump.

The filter screen 6 is made of nylon cloth, and has the advantages of low cost, good water filtering effect and easiness in construction.

Referring to fig. 1, the packing layer of the present embodiment includes gravels 101, high-quality clay balls 102, and clay 103 arranged in this order from bottom to top. The gravel is hard, so that the stability of the dewatering well and the connection of the water pipe can be well ensured; meanwhile, the gravel has high porosity, so that the underground water can penetrate through the gravel, enter the downcomer and be pumped out by the water pump. The high-quality clay balls play a role in blocking water and prevent underground water from overflowing out of the ground through the dewatering well. The clay also plays a role in water plugging, underground water is prevented from overflowing out of the ground through the dewatering well, the effect of the high-quality clay balls is better than that of the clay, but the price of the high-quality clay balls is higher than that of the clay, so that the clay can be adopted for replacing in a range close to an inlet; the construction cost is effectively reduced while the water plugging effect is ensured.

The filter pipe 3 of the embodiment is connected with the well pipe 2 and the sand settling pipe 8 in a welding mode, so that the connection stability is ensured.

Referring to fig. 1, the top of the downcomer of this embodiment is 500mm above the surface of the foundation pit. On one hand, the ground water can be prevented from flowing into the precipitation well; on the other hand, the soil body excavated at the periphery can be prevented from being covered due to improper operation in the excavation process; and can prevent foreign matters from falling into the precipitation well.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The pressure-bearing dewatering well is characterized by comprising a dewatering well (1) arranged in a foundation pit (7), wherein a dewatering pipe is arranged in the dewatering well, and the dewatering pipe comprises a well pipe (2), a filter pipe (3) and a sand settling pipe (8) which are sequentially arranged from top to bottom; the filter pipe is provided with a plurality of filter holes, a packing layer is arranged between the dewatering pipe and the dewatering well, a water suction pump (4) for pumping underground water is arranged in the filter pipe, the water suction pump is connected with a water outlet pipe (5), and the water outlet pipe extends to the outside of the dewatering well.

2. Pressure-bearing dewatering well according to claim 1, characterized in that the outer wall of the filter pipe is provided with a screen (6).

3. Pressure-bearing dewatering well according to claim 2, characterized in that the screen (6) is nylon cloth.

4. The pressure-bearing precipitation well as claimed in claim 1, wherein the packing layer comprises gravels (101), high-quality clay balls (102) and clay (103) arranged in sequence from bottom to top.

5. A pressure-bearing dewatering well according to claim 1, characterized in that the filter pipe (3) is connected with the well casing (2) and the sand sediment pipe (8) by welding.

6. The pressure-bearing dewatering well as claimed in claim 1, wherein the top of the dewatering pipe is higher than the surface of the foundation pit.

7. The pressure-bearing dewatering well as claimed in claim 6, wherein the top of the dewatering pipe is 400-600 mm higher than the surface of the foundation pit.