CN214574063U - Closed structure of high water level large area foundation pit dewatering well - Google Patents
Closed structure of high water level large area foundation pit dewatering well Download PDFInfo
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- CN214574063U CN214574063U CN202022745020.5U CN202022745020U CN214574063U CN 214574063 U CN214574063 U CN 214574063U CN 202022745020 U CN202022745020 U CN 202022745020U CN 214574063 U CN214574063 U CN 214574063U
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Abstract
The invention discloses a closed structure of a high-water-level large-area foundation pit dewatering well, which solves the problem that the existing closed method consumes too much stones and concrete plugging materials. The foundation pit structure comprises a foundation pit (1), wherein a raft plate (6) is arranged at the bottom of the foundation pit (1), a precipitation well (2) is arranged on the raft plate (6), a precast concrete immersed tube (7) is arranged in the precipitation well (2), a cross-shaped support (11) is arranged on the raft plate (6) at the wellhead of the precipitation well (2), a suspender (9) is welded on the cross-shaped support (11), a plugging plate (8) is fixedly connected to the lower end of the suspender (9), the plugging plate (8) is arranged in the precipitation well (2), the plugging plate (8) is arranged at a position 1 meter below the raft plate (6), water stop sheets (10) are arranged on the suspender (9) at intervals, and concrete is poured in the well body of the precipitation well (2) above the plugging plate (8). The invention greatly saves the plugging material of the dewatering well.
Description
Technical Field
The invention relates to a dewatering well in a high-water-level large-area foundation pit, in particular to a dewatering well sealing structure and a sealing method of the high-water-level large-area foundation pit in civil engineering.
Background
When a large-area foundation pit is excavated in an area with a high underground water level, firstly, a dewatering well is arranged on the ground within the excavation range of the foundation pit, and the drilling depth of the dewatering well exceeds the depth of the bottom of the foundation pit; after the dewatering well is drilled to form a hole, putting a precast concrete immersed tube in the well to protect the wall, and completing the forming of the dewatering well; then, continuously pumping water to the dewatering well to maintain the underground water level at the foundation pit below the bottom of the foundation pit, then, beginning to excavate a large-area foundation pit, after the foundation pit is excavated, sequentially constructing a gravel cushion layer, a waterproof layer and a waterproof protective layer on the foundation pit base, then pouring a raft, combining the wellhead of the dewatering well of the foundation pit and the raft into a whole, and constructing a main body structure on the raft; in the construction process of the main structure, water pumping and dewatering operation is carried out uninterruptedly through the dewatering well mouth on the raft plate until the whole main structure is capped; after the major structure capping, according to traditional technological requirement, need carry out the shutoff operation to the precipitation well, prior art is in pouring stone and concrete into the precipitation well on the raft, tamp and seal whole precipitation well body, because there is the water level of take the altitude in the precipitation all the time, pour into gravel and sand in-process in to the well, groundwater in the well is very easily extruded and is risen above the raft, need carry out secondary treatment to the excessive well water on the raft, in addition, carry out whole tamp confined mode to the precipitation well, can consume a large amount of stone and concrete, cause the increase by a wide margin of construction cost.
Disclosure of Invention
The invention provides a sealing structure of a high-water-level large-area foundation pit dewatering well and a sealing method thereof, and solves the technical problem that the existing sealing method consumes overlarge stones and concrete plugging materials.
The invention solves the technical problems by the following technical scheme:
the general concept of the invention is: a method for plugging the dewatering well on the raft with concrete immersed tubes features that a cross-shaped supporting frame is arranged on the raft, a wellhead closing steel plate is suspended from said supporting frame, and the steel plate is immersed in the dewatering well under 1 m lower than the raft.
The utility model provides a closed structure of high water level large tracts of land foundation ditch precipitation well, including the foundation ditch, be provided with the raft board in the bottom of foundation ditch, be provided with the precipitation well on the raft board, be provided with the precast concrete immersed tube in the precipitation well, be provided with the cross support on the raft board of well head department of precipitation well, the welding has the jib on the cross support, lower extreme fixedly connected with shutoff board at the jib, the shutoff board sets up in the precipitation well, the shutoff board sets up 1 meter department below the raft board, be provided with the waterstop at the interval on the jib, concrete has been pour in the well body of precipitation well above the shutoff board.
A waterproof protective layer, a waterproof layer and a plain concrete cushion layer are sequentially arranged below the raft; three suspension rods are arranged between the cross-shaped bracket and the plugging plate.
A method for sealing a high water level large area foundation pit dewatering well comprises the following steps:
firstly, manufacturing a cross-shaped bracket, welding a hanging rod on the cross-shaped bracket, welding a plugging plate at the lower end of the hanging rod, wherein the length of the hanging rod is more than 1.5 meters, and arranging water stop sheets on the hanging rod at intervals;
secondly, placing the plugging piece manufactured in the first step into a precipitation well, and enabling the cross-shaped bracket to be supported on the top surface of the raft plate;
and thirdly, pouring concrete in the well body of the dewatering well above the plugging plate, sealing the well mouth of the dewatering well, and combining the raft plate and the poured concrete into a whole after the poured concrete is solidified.
The invention greatly saves the plugging material of the dewatering well, realizes the reliable plugging of the well body, and has simple operation and low construction cost.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of the construction of the closure of the present invention.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
the utility model provides a closed structure of high water level large tracts of land foundation ditch precipitation well, including foundation ditch 1, be provided with raft 6 in the bottom of foundation ditch 1, be provided with precipitation well 2 on raft 6, be provided with precast concrete immersed tube 7 in precipitation well 2, be provided with cross support 11 on raft 6 of the well head department of precipitation well 2, the welding has jib 9 on cross support 11, lower extreme fixedly connected with closure plate 8 at jib 9, closure plate 8 sets up in precipitation well 2, closure plate 8 sets up 1 meter department below raft 6, be provided with waterstop 10 on jib 9 at an interval, the concrete has been pour in the well body of precipitation well 2 more than closure plate 8.
A waterproof protective layer 5, a waterproof layer 4 and a plain concrete cushion layer 3 are sequentially arranged below the raft 6; three suspension rods 9 are arranged between the cross-shaped bracket 11 and the plugging plate 8.
A method for sealing a high water level large area foundation pit dewatering well comprises the following steps:
firstly, manufacturing a cross-shaped support 11, welding a suspender 9 on the cross-shaped support 11, welding a plugging plate 8 at the lower end of the suspender 9, wherein the length of the suspender 9 is more than 1.5 m, and arranging water stop sheets 10 on the suspender 9 at intervals;
secondly, placing the plugging piece manufactured in the first step into the precipitation well 2, and enabling the cross-shaped bracket 11 to be erected on the top surface of the raft 6;
and thirdly, pouring concrete in the well body of the dewatering well 2 above the plugging plate 8, sealing the well mouth of the dewatering well, and combining the raft plates 6 and the poured concrete into a whole after the poured concrete is solidified.
Claims (2)
1. The utility model provides a seal structure of high water level large tracts of land foundation ditch precipitation well, including foundation ditch (1), be provided with raft (6) in the bottom of foundation ditch (1), be provided with precipitation well (2) on raft (6), be provided with precast concrete immersed tube (7) in precipitation well (2), a serial communication port, be provided with cross support (11) on raft (6) of the well head department of precipitation well (2), welding jib (9) on cross support (11), lower extreme fixedly connected with closure plate (8) at jib (9), closure plate (8) set up in precipitation well (2), closure plate (8) set up 1 meter below raft (6), be provided with waterstop (10) on jib (9) at an interval, concrete has been pour in the well body of precipitation well (2) more than closure plate (8).
2. The closed structure of the dewatering well for the foundation pit with the high water level and the large area according to claim 1, characterized in that a waterproof protective layer (5), a waterproof layer (4) and a plain concrete cushion layer (3) are sequentially arranged below the raft (6); three suspension rods (9) are arranged between the cross-shaped bracket (11) and the plugging plate (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022745020.5U CN214574063U (en) | 2020-11-24 | 2020-11-24 | Closed structure of high water level large area foundation pit dewatering well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022745020.5U CN214574063U (en) | 2020-11-24 | 2020-11-24 | Closed structure of high water level large area foundation pit dewatering well |
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| CN214574063U true CN214574063U (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022745020.5U Active CN214574063U (en) | 2020-11-24 | 2020-11-24 | Closed structure of high water level large area foundation pit dewatering well |
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| CN (1) | CN214574063U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114457828A (en) * | 2022-01-24 | 2022-05-10 | 北京城建设计发展集团股份有限公司 | Construction method of open cut fabricated underground structure foundation pit dewatering well |
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2020
- 2020-11-24 CN CN202022745020.5U patent/CN214574063U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114457828A (en) * | 2022-01-24 | 2022-05-10 | 北京城建设计发展集团股份有限公司 | Construction method of open cut fabricated underground structure foundation pit dewatering well |
| CN114457828B (en) * | 2022-01-24 | 2024-02-23 | 北京城建设计发展集团股份有限公司 | Construction method for open cut assembled underground structure foundation pit dewatering well |
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