CN221167881U - Foundation pit hydrophobic structure suitable for under rich water stratum condition - Google Patents
Foundation pit hydrophobic structure suitable for under rich water stratum condition Download PDFInfo
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- CN221167881U CN221167881U CN202322345038.XU CN202322345038U CN221167881U CN 221167881 U CN221167881 U CN 221167881U CN 202322345038 U CN202322345038 U CN 202322345038U CN 221167881 U CN221167881 U CN 221167881U
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- Prior art keywords
- drainage
- foundation pit
- foundation
- layer
- blind pipe
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 230000002209 hydrophobic effect Effects 0.000 title claims description 12
- 238000001914 filtration Methods 0.000 claims abstract description 12
- 239000002689 soil Substances 0.000 claims abstract description 7
- 239000003673 groundwater Substances 0.000 claims abstract description 6
- 239000011435 rock Substances 0.000 claims abstract description 4
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 229910001018 Cast iron Inorganic materials 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 claims description 3
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 5
- 238000005755 formation reaction Methods 0.000 claims 5
- 239000000758 substrate Substances 0.000 abstract description 5
- 238000010276 construction Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses a foundation pit dewatering structure suitable for a water-rich stratum condition, which comprises foundation pits excavated in a rock soil layer by grading, wherein a dewatering plate is paved at the pit bottom of the foundation pit at the lowest layer, the height of the pit bottom of the foundation pit at the lowest layer is lower than that of a ground water line, a drainage blind pipe is closely connected with the dewatering plate, one end of the drainage blind pipe, which is far away from the dewatering plate, stretches into a drainage ditch, the drainage ditch is arranged on the outer side of a concrete structure planned in the foundation pit, a reverse filtering layer is arranged on a foundation pit slope contacted with the ground water level for dewatering, and a layer of concrete protection cushion layer is poured on a substrate.
Description
Technical Field
The utility model relates to the technical field of foundation pit drainage, in particular to a foundation pit drainage 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 yield size, to the condition that the underground water level line is above the foundation pit of the lowest layer, the upper substrate is below in this text, in the conventional art, the manner of pipe well dewatering is often adopted. However, the method has long construction period and high construction cost, and also has the risk of improper leakage blocking in the later period.
Disclosure of utility model
Aiming at the defects of the prior art, the utility model provides a foundation pit drainage structure suitable for water-rich stratum conditions, which comprises a foundation pit excavated in a rock soil layer by grading, wherein a drainage plate is paved at the pit bottom of the foundation pit at the lowest layer, the pit bottom of the foundation pit at the lowest layer is lower than the underground water line, a drainage blind pipe is closely connected with the drainage plate, one end of the drainage blind pipe, which is far away from the drainage plate, extends into a drainage ditch, the drainage ditch is arranged at the outer side of a concrete structure planned in the foundation pit, a reverse filtering layer is arranged on the foundation pit slope contacted with the underground water level for drainage, and a concrete protection cushion layer is poured on the substrate.
Preferably, the hydrophobic plate is made of high-strength polyvinyl chloride plastic, the upper surface is flat, the lower surface is of an arc structure, and the thickness of the hydrophobic plate is not less than 5cm.
Preferably, an open trench is formed in the rock soil layer and used for embedding the drainage blind pipe, and gaps between the inner wall of the open trench and the drainage blind pipe are blocked by filling waterproof sediment in the open trench.
Preferably, the pipe diameter of the drainage blind pipe is not less than 100mm, the distance between adjacent drainage blind pipes is not more than 2m, and the drainage blind pipe is made of high-strength plastic or cast iron pipe.
Preferably, the reverse filtering layer is filled with medium coarse sand, the non-woven fabric is covered outside, and the thickness of the reverse filtering layer is 15cm.
Preferably, the thickness of the concrete protection cushion layer is 5cm.
In summary, the utility model has the following beneficial effects: according to the utility model, the underground water line can be conveniently found through the foundation pit excavated in a layered manner and is conveniently constructed outside the foundation pit at different layers, the drain blind pipe is led into the underground water through the drain board at the bottom of the foundation pit, and the underground water is discharged into the drain ditch.
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 groundwater level; 2. a rock-soil layer; 3. foundation pit side slope; 4. a hydrophobic plate; 5. a drainage blind pipe; 6. a reverse filtration layer; 7. a drainage ditch; 8. a concrete cushion layer; 9. and (5) building a concrete structure.
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 drainage structure suitable for a water-rich stratum condition, which comprises a foundation pit excavated in a rock-soil layer 2 by grading, wherein a drainage plate 4 is paved at the pit bottom of the foundation pit at the lowest layer, the pit bottom of the foundation pit is lower than the underground water line 1 in height, the drainage blind pipe 5 is closely connected with the drainage plate 4, one end of the drainage blind pipe 5, far away from the drainage plate 4, stretches into a drainage ditch 7, the drainage ditch 7 is arranged on the outer side of a concrete structure 9 to be built in the foundation pit, a reverse filtering layer 6 is arranged on the foundation pit slope 3 contacted with the underground water level for drainage, and a layer of concrete protection cushion layer is poured on the foundation pit.
The construction method of the utility model comprises the following steps:
1. Foundation pit excavation: 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. Laying a hydrophobic plate 4: when the pit bottom of the foundation pit at the lowest layer is excavated, a hydrophobic plate 4 is paved, the hydrophobic plate 4 is made of high-strength polyvinyl chloride plastics, the lower surface is of an arc-shaped structure and is used for dredging water flow, and the upper surface is flat and has certain compressive strength. The thickness of the hydrophobic plate 4 is not less than 5cm.
3. Pre-buried drainage blind pipe 5: and excavating an open ditch immediately following the drain plate 4, embedding a drain blind pipe 5, and sealing and connecting with the drain plate 4, wherein the drain blind pipe is waterproof and has silt blockage. The pipe diameter of the drainage blind pipe 5 is not less than 100mm, the interval is not more than 2m, the drainage blind pipe is made of high-strength plastic or cast iron pipe, and the other end of the drainage blind pipe extends into the drainage ditch 7.
4. Building a drainage ditch 7: outside the structure to be built, a drainage ditch 7 is built for collecting the groundwater drained from the drainage plate 4. The width is not less than 500mm.
5. And (3) construction of a reverse filtration layer 6: and arranging a reverse filtering layer 6 on the foundation pit slope contacted with the underground water level, wherein the thickness of the reverse filtering layer 6 is 15cm, filling with medium coarse sand and covering non-woven fabrics.
6. And (3) constructing a concrete cushion layer 8: in order to meet the construction requirement of the upper structure, a layer of concrete protection cushion layer with the thickness of 5cm is poured on the substrate.
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 (6)
1. The utility model provides a foundation ditch hydrophobic structure suitable for under rich water stratum condition which characterized in that: including grading the slope excavation in the foundation ditch in the ground layer, the lower floor the drainage board has been laid at the pit bottom of foundation ditch, the lower floor the pit bottom of foundation ditch highly be less than the height of groundwater level line, immediately the drainage board seals and is connected with drainage blind pipe, the drainage blind pipe is kept away from the one end of drainage board and is stretched into in the escape canal, the outside of the concrete structure is planned to be built in the foundation ditch is seted up to the escape canal, on the foundation ditch side slope with groundwater level contact, sets up a reverse filtering layer and is used for the drainage, still pour one deck concrete protection bed course on the pit bottom of foundation ditch.
2. A foundation pit dewatering structure suitable for use in water-rich formations according to claim 1, wherein: the hydrophobic plate is made of high-strength polyvinyl chloride plastic, the upper surface is flat, the lower surface is of an arc-shaped structure, and the thickness of the hydrophobic plate is not less than 5cm.
3. A foundation pit dewatering structure suitable for use in water-rich formations according to claim 2, wherein: an open ditch is formed in the rock soil layer and used for embedding the drainage blind pipe, and gaps between the inner wall of the open ditch and the drainage blind pipe are blocked by filling waterproof silt in the open ditch.
4. A foundation pit dewatering structure for use in water-rich formations according to claim 3, wherein: the pipe diameter of the drainage blind pipe is not less than 100mm, the distance between adjacent drainage blind pipes is not more than 2m, and the drainage blind pipe is made of high-strength plastic or cast iron pipe.
5. A foundation pit dewatering structure for water-rich formations according to claim 4, wherein: the reverse filtering layer is filled with medium coarse sand, the non-woven fabric is covered outside, and the thickness of the reverse filtering layer is 15cm.
6. A foundation pit dewatering structure for water-rich formations according to claim 5, wherein: the thickness of the concrete protection cushion layer is 5cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322345038.XU CN221167881U (en) | 2023-08-30 | 2023-08-30 | Foundation pit hydrophobic structure suitable for under rich water stratum condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322345038.XU CN221167881U (en) | 2023-08-30 | 2023-08-30 | Foundation pit hydrophobic structure suitable for under rich water stratum condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221167881U true CN221167881U (en) | 2024-06-18 |
Family
ID=91460655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322345038.XU Active CN221167881U (en) | 2023-08-30 | 2023-08-30 | Foundation pit hydrophobic structure suitable for under rich water stratum condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221167881U (en) |
-
2023
- 2023-08-30 CN CN202322345038.XU patent/CN221167881U/en active Active
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