CN220868271U - Foundation pit dewatering structure suitable for under rich water stratum condition - Google Patents
Foundation pit dewatering structure suitable for under rich water stratum condition Download PDFInfo
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- CN220868271U CN220868271U CN202322344970.0U CN202322344970U CN220868271U CN 220868271 U CN220868271 U CN 220868271U CN 202322344970 U CN202322344970 U CN 202322344970U CN 220868271 U CN220868271 U CN 220868271U
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- water
- foundation pit
- layer
- pit
- steel pipe
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 45
- 239000010959 steel Substances 0.000 claims abstract description 45
- 238000005553 drilling Methods 0.000 claims abstract description 12
- 239000003673 groundwater Substances 0.000 claims abstract description 7
- 239000011435 rock Substances 0.000 claims abstract description 4
- 239000004745 nonwoven fabric Substances 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 4
- 238000001556 precipitation Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 description 10
- 239000013049 sediment Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Abstract
The utility model discloses a foundation pit dewatering structure suitable for water-rich stratum conditions, which comprises foundation pits excavated in a rock stratum by grading, wherein the bottoms of each layer of foundation pit positioned on a ground water line are drilled by adopting a well drilling machine, after the drilling is completed, steel pipes are inserted into holes, water pumps are placed in the steel pipes, the upper ends of the steel pipes positioned in each layer of foundation pit are immersed into the pit bottoms of the foundation pits, a layer of concrete protection cushion layer is poured at the bottoms of each layer of foundation pit, and a circle of water-stopping steel plates are welded on a pipeline at the middle position of the foundation pit bottoms.
Description
Technical Field
The utility model relates to the technical field of foundation pit drainage, in particular to a foundation pit dewatering structure suitable for water-rich stratum conditions.
Background
Foundation pit construction is a common form in the construction industry, but the foundation pit should be constructed in a dry working environment, and in the presence of water environment, personnel, materials and machinery cannot work normally. Thus, keeping the substrate anhydrous, and even dry, is an important concern. For the treatment of foundation pit bottom water, to have different treatment methods according to the water level line and the water volume, to the condition that the underground water level line is above the foundation pit bottom in this text, in the conventional art, the method of inserting the pipe well in advance before the foundation pit is not excavated is often adopted, and the water is pre-reduced. However, the method has long construction period and high construction cost.
Disclosure of utility model
Aiming at the defects of the prior art, the utility model provides a foundation pit dewatering structure suitable for water-rich stratum conditions, which comprises foundation pits excavated in a rock stratum by grading slope laying, wherein the bottoms of each layer of foundation pit positioned on a ground water line are drilled by adopting well drilling machinery, after the drilling is completed, steel pipes are inserted into holes, water suction pumps are placed in the steel pipes, the upper ends of the steel pipes positioned in each layer of foundation pit are immersed in the pit bottoms of the foundation pit, a layer of concrete protection cushion layer is poured at the bottom of each layer of foundation pit, and a circle of water stop steel plates are welded on pipelines at the middle positions of the foundation pit bottoms.
Preferably, the diameter of the steel pipe is 350mm, plum blossom-shaped small holes are formed in the whole body of the steel pipe, the aperture of each small hole is 5mm, and the distance between every two adjacent small holes is 10cm.
Preferably, the steel pipe is wound with water-permeable non-woven fabrics or dense-mesh wire meshes around the whole body.
Preferably, the thickness of the concrete protection cushion layer is 5cm.
Preferably, the wall thickness of the water stop steel plate is not less than 8mm.
In summary, the utility model has the following beneficial effects: according to the utility model, the underground water line can be controlled to be at the required bottom height of the foundation pit through the foundation pit excavated in a layered manner, specifically, the bottom of each layer of foundation pit is drilled and inserted into the steel pipe, and the water suction pump is arranged in the steel pipe, so that the underground water line is lowered by pumping the underground water into the steel pipe through the steel pipe by the water suction pump, and the foundation pits with different heights, namely, the steel pipes with different heights, can enable the underground water to be pumped to be at the required foundation pit height.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
Fig. 1 is a plan view of the construction of the present utility model.
In the figure: 1. a rock-soil layer; 2. a groundwater level; 3. a foundation pit; 4. a steel pipe; 5. a concrete protective cushion layer; 6. a water-stopping steel plate; 7. and a superstructure.
Detailed Description
The technical scheme of the utility model is described in detail below through the drawings, but the protection scope of the utility model is not limited to the embodiments.
Referring to fig. 1, the utility model relates to a foundation pit dewatering structure suitable for water-rich stratum condition, which comprises foundation pits 3 excavated in a rock stratum 1 by grading slope-discharging, drilling the bottom of each layer of foundation pit 3 positioned on a groundwater level line 2 by adopting a well-drilling machine, inserting a steel pipe 4 into a hole after the drilling is completed, arranging a water suction pump in the steel pipe 4, immersing the upper end of the steel pipe 4 positioned in each layer of foundation pit into the pit bottom of the foundation pit, pouring a layer of concrete protection cushion layer 5 positioned at the bottom of each layer of foundation pit, and welding a circle of water-stopping steel plates 6 on a pipeline at the middle position of the foundation pit bottom, the water suction pump is arranged in the steel pipe 4, so that the water suction pump pumps the underground water into the steel pipe 4 through the steel pipe 4 to lower the underground water line 2, foundation pits with different heights, namely, the steel pipes 4 with different heights, enable the underground water to be pumped to the required foundation pit height. The wall thickness of the water stop steel plate 6 is not less than 8mm, and the welding seam is tight.
In the utility model, the diameter of the steel pipe 4 is 350mm, the pumping speed is ensured, plum blossom-shaped small holes are formed on the whole body of the steel pipe 4 so as to collect peripheral groundwater, the aperture of each small hole is 5mm, the distance between adjacent small holes is 10cm, and the whole body of the steel pipe 4 is wound with water-permeable non-woven fabrics or dense-mesh wire meshes so as to isolate sediment and prevent the sediment from entering the pipe.
The construction method of the utility model comprises the following steps:
1. Excavation of foundation pit 3: and grading slope-releasing excavation is carried out on the foundation pit, and the slope-releasing gradient is respectively determined according to different soil conditions.
2. And (3) construction of a dewatering well: and (3) drilling holes at the bottom of a pre-designed foundation pit by adopting a special well drilling machine, and lowering the steel pipe 4 after the drilling holes are completed. The diameter of the steel pipe 4 is 350mm, so that the water pump can be conveniently placed in the pipe; the pipeline buried in the soil is provided with plum blossom-shaped small holes on the whole body so as to collect peripheral groundwater, and the aperture is 5mm and the interval is 10cm; before the steel pipe 4 is put down, the whole body of the pipe is wound with water-permeable non-woven fabrics or dense-mesh wire meshes for isolating sediment and preventing the sediment from entering the pipe.
3. And (5) constructing a concrete protection cushion layer: to meet the construction requirements of the superstructure 7, a layer of 5cm thick concrete protection blanket 5 is poured over the substrate.
4. Welding a water stop steel plate 6: in order to prevent water flow from flowing upwards along the pipe wall under the action of water pressure after the structure construction is completed, a circle of water stop steel plates 6 are welded on the pipeline at the middle position of the foundation pit bottom plate, so that the water penetration path is prolonged, and the waterproof effect is improved. The wall thickness of the water stop steel plate 6 is not less than 8mm, and the welding seam is tight.
The utility model can pump down the underground water level below the bottom of the foundation pit, keep the substrate anhydrous and dry, and facilitate the subsequent construction.
While the utility model has been shown and described with reference to certain preferred embodiments thereof, it is not to be construed as limited to the utility model itself, but various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (5)
1. Foundation ditch precipitation structure suitable for under rich water stratum condition, its characterized in that: the foundation pit is excavated in a rock soil layer by grading slope discharging, well drilling machinery is adopted at the bottom of each layer of foundation pit positioned on a ground water line, a steel pipe is inserted into a hole after the drilling is completed, a water suction pump is arranged in the steel pipe in a descending mode, the upper end of the steel pipe positioned in each layer of foundation pit is immersed in the pit bottom of the foundation pit, a layer of concrete protection cushion layer is poured at the bottom of each layer of foundation pit, and a circle of water stop steel plate is welded on a pipeline at the middle position of the foundation pit bottom.
2. A pit dewatering structure suitable for use in water-rich formation conditions as claimed in claim 1, wherein: the diameter of the steel pipe is 350mm, plum blossom-shaped small holes are formed in the whole body of the steel pipe, the aperture of each small hole is 5mm, and the distance between every two adjacent small holes is 10cm.
3. A pit dewatering structure suitable for use in water-rich formation conditions as claimed in claim 2, wherein: the steel pipe is wound with water-permeable non-woven fabrics or dense-mesh wire meshes around the whole body.
4. A pit dewatering structure suitable for use in water-rich formation conditions according to claim 3, wherein: the thickness of the concrete protection cushion layer is 5cm.
5. A pit dewatering structure suitable for use in water-rich formation conditions as claimed in claim 4, wherein: the wall thickness of the water stop steel plate is not less than 8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322344970.0U CN220868271U (en) | 2023-08-30 | 2023-08-30 | Foundation pit dewatering structure suitable for under rich water stratum condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322344970.0U CN220868271U (en) | 2023-08-30 | 2023-08-30 | Foundation pit dewatering structure suitable for under rich water stratum condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220868271U true CN220868271U (en) | 2024-04-30 |
Family
ID=90811808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322344970.0U Active CN220868271U (en) | 2023-08-30 | 2023-08-30 | Foundation pit dewatering structure suitable for under rich water stratum condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220868271U (en) |
-
2023
- 2023-08-30 CN CN202322344970.0U patent/CN220868271U/en active Active
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