CN214194602U - Precipitation structure suitable for deep foundation pit of high-pressure-bearing water-rich karst stratum - Google Patents
Precipitation structure suitable for deep foundation pit of high-pressure-bearing water-rich karst stratum Download PDFInfo
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- CN214194602U CN214194602U CN202022904030.9U CN202022904030U CN214194602U CN 214194602 U CN214194602 U CN 214194602U CN 202022904030 U CN202022904030 U CN 202022904030U CN 214194602 U CN214194602 U CN 214194602U
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Abstract
The utility model discloses a precipitation structure suitable for deep foundation pit of high pressure-bearing rich water karst stratum, including precipitation well, submersible pump and drain pipe arranged in precipitation well, its characterized in that still includes the underdrain that sets up in the foundation pit bottom surface, connects between foundation pit gushing water point and precipitation well and is used for collecting karst crack gushing water to the precipitation well, lays in the underdrain bottom, is used for introducing the gushing water in the foundation pit gushing water point into the filtration pipe in the precipitation well, backfills in the underdrain, with the rubble inverted filter of filtration pipe cladding; and water inlet holes are uniformly formed in the filter tube. The utility model discloses can guarantee that the basement is in anhydrous environment, can provide good operational environment for subsequent bed course, waterproof, major structure construction.
Description
Technical Field
The utility model belongs to the technical field of deep basal pit dewatering, concretely relates to dewatering structure suitable for rich water karst stratum deep basal pit of high pressure-bearing.
Background
In the construction of engineering projects such as building engineering, urban rail transit and the like, a well point dewatering method is generally adopted for dewatering deep foundation pits of underground stations of building engineering basements and urban rail transit, the method is used in a construction environment with a higher underground water level, is an important technical measure in the construction of earthwork engineering, foundations and foundation engineering, can drain water in foundation soil, promote soil consolidation and improve foundation strength, can reduce lateral displacement and settlement of soil on an earth slope, stabilize the side slope, eliminate quicksand and reduce uplift of the soil on the foundation, can avoid the influence of underground water on the construction of the foundations and the foundation engineering below natural underground water, provides a drier construction condition, can reduce the amount of earth, shorten the construction period, improve the engineering quality and ensure the construction safety. The well point method drainage is suitable for foundation pits which are high in powder, fine sand or underground water level, deep in foundation excavation, difficult to stabilize pit walls and difficult to solve by a common drainage method, but in a high-pressure-bearing water-rich karst stratum, because rock cracks develop very much, most of underground water exists in the karst cracks, the connectivity of a water channel has great uncertainty, the well point position cannot be accurately positioned in the karst cracks, the well point dewatering effect on the stratum is not good, how to improve the dewatering effect of the high-pressure-bearing water-rich karst stratum is to ensure that the foundation is in a water-free environment, and the project construction quality is ensured to be a difficult point to solve urgently.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the utility model provides a precipitation structure suitable for rich water karst stratum deep basal pit of high pressure-bearing can guarantee that the basement is in anhydrous environment, can provide good operational environment for subsequent bed course, waterproof, major structure construction.
The utility model discloses a following technical scheme realizes.
The dewatering structure is suitable for a deep foundation pit of a high-pressure-bearing water-rich karst stratum, comprises a dewatering well, a submersible pump and a drain pipe, and is characterized by also comprising an underdrain, a filter pipe and a gravel reverse filter layer, wherein the underdrain is arranged on the bottom surface of the foundation pit and connected between a water gushing point of the foundation pit and the dewatering well and used for collecting karst fracture water gushing into the dewatering well; and water inlet holes are uniformly formed in the filter tube.
As a specific technical scheme, the gradient of the underdrain is 1 per thousand.
As a specific technical scheme, the depth of the underdrain is 15-25 cm, and the width of the underdrain is 25-35 cm.
As a specific technical scheme, the water inlet holes are arranged on the filter tube in a quincunx shape at intervals of 50mm multiplied by 50 mm.
As a specific technical scheme, the filter tube is a PVC tube, and the diameter of the filter tube is 80-150 mm.
As a specific technical scheme, the outer surface of the filter tube is wrapped with a layer of fine filter screen.
As a specific technical scheme, the mesh number of the fine filter screen is 50 meshes.
As a specific technical scheme, the gravel reverse filter layer is paved by adopting gravel with the diameter of 20-30 mm.
The utility model has the advantages that:
the utility model provides a high pressure-bearing rich water karst stratum deep basal pit the not good technical problem of precipitation effect when only adopting precipitation well, construction process is easy and simple to handle simultaneously, can guarantee that the basement is in anhydrous environment, provides good operational environment for subsequent bed course, waterproof, major structure construction.
Drawings
FIG. 1 is a top view of the precipitation structure of the present invention;
FIG. 2 is a schematic cross-sectional view of a blind ditch in a precipitation structure of the present invention;
FIG. 3 is a schematic view of the filter tube connected to the precipitation well in the precipitation structure of the present invention;
the meanings of the marks in the above figures are as follows: 1-dewatering well, 2-submersible pump, 3-drain pipe, 4-blind ditch, 5-foundation pit water burst point, 6-filter pipe, 601-water inlet hole, 7-gravel reverse filter layer and 8-foundation pit bottom surface.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", 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. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Examples
The dewatering structure is suitable for a deep foundation pit of a high-pressure-bearing water-rich karst stratum, please refer to fig. 1 to 3, and comprises a dewatering well 1, a submersible pump 2 and a drainage pipe 3 which are arranged in the dewatering well 1, an underdrain 4 which is arranged on the bottom surface 8 of the foundation pit and connected between a foundation pit water burst point 5 and the dewatering well 1 and is used for collecting karst fracture water burst into the dewatering well 1, a filter pipe 6 which is laid at the bottom of the underdrain 4 and is used for introducing water burst in the foundation pit water burst point 5 into the dewatering well 1, and a gravel reverse filter layer 7 which is backfilled in the underdrain 4 and wraps the filter pipe 6; wherein, the filter tube 6 is evenly provided with water inlet holes 601.
Further, in a preferred embodiment, the slope of the underdrain 4 is 1 ‰, so that the water flowing direction of the underdrain 4 is the foundation ditch water inrush point 5 and flows to the dewatering well 1.
Further, in a preferred embodiment, the depth of the underdrain 4 is 15 to 25cm, and the width is 25 to 35 cm.
Further, in a preferred embodiment, the water inlet holes 601 are provided on the filter tube 6 at intervals of 50mm x 50mm in a quincunx shape.
Further, in a preferred embodiment, the filter tube 6 is a PVC tube with a diameter of 80-150 mm.
Further, in a preferred embodiment, the outer surface of the filter tube 6 is covered with a fine screen to prevent debris such as sand and sand from blocking the filter tube.
Further, in a preferred embodiment, the mesh number of the fine filter screen is 50 meshes.
Further, in a preferred embodiment, the gravel reverse filter layer 7 is paved by gravel with the diameter of 20-30 mm.
Claims (9)
1. The dewatering structure is suitable for a deep foundation pit of a high-bearing-pressure water-rich karst stratum and comprises a dewatering well (1), a submersible pump (2) and a drainage pipe (3) which are arranged in the dewatering well (1), and is characterized by also comprising an underdrain (4) which is arranged on the bottom surface (8) of the foundation pit and is connected between a foundation pit water burst point (5) and the dewatering well (1) and used for collecting karst fracture water burst into the dewatering well (1), a filter pipe (6) which is laid at the bottom of the underdrain (4) and used for introducing the water burst in the foundation pit water burst point (5) into the dewatering well (1), and a broken stone reverse filter layer (7) which is backfilled in the underdrain (4) and wraps the filter pipe (6); and water inlet holes (601) are uniformly formed in the filter pipe (6).
2. The dewatering structure suitable for the deep foundation pit of the high-pressure-bearing water-rich karst formation according to claim 1, wherein the slope of the blind ditch (4) is 1 per thousand.
3. The dewatering structure suitable for the deep foundation pit of the high-pressure-bearing water-rich karst formation according to claim 1, wherein the depth of the blind ditch (4) is 15-25 cm, and the width of the blind ditch is 25-35 cm.
4. The dewatering structure suitable for the deep foundation pit of the high-pressure-bearing water-rich karst formation according to claim 1, wherein the water inlet holes (601) are arranged on the filter pipes (6) at intervals of 50mm x 50mm in a quincunx shape.
5. The dewatering structure suitable for the deep foundation pit of the high-pressure-bearing water-rich karst formation is characterized in that the diameter of the water inlet hole (601) is 8-12 mm.
6. The dewatering structure suitable for the deep foundation pit of the high-pressure-bearing water-rich karst formation according to claim 1, wherein the filter pipe (6) is a PVC pipe with the diameter of 80-150 mm.
7. The structure of lowering water in deep foundation pit in high pressure bearing water-rich karst stratum according to claim 1, characterized in that the outer surface of said filter tube (6) is covered with a layer of fine screen.
8. The water lowering structure suitable for the deep foundation pit of the high pressure bearing water-rich karst formation according to claim 7, wherein the mesh number of the fine filter screen is 50 meshes.
9. The dewatering structure suitable for the deep foundation pit in the high-pressure-bearing water-rich karst stratum according to any one of claims 1 to 8, wherein the gravel reverse filter layer (7) is laid by using 20-30 mm diameter gravel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022904030.9U CN214194602U (en) | 2020-12-04 | 2020-12-04 | Precipitation structure suitable for deep foundation pit of high-pressure-bearing water-rich karst stratum |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022904030.9U CN214194602U (en) | 2020-12-04 | 2020-12-04 | Precipitation structure suitable for deep foundation pit of high-pressure-bearing water-rich karst stratum |
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| CN214194602U true CN214194602U (en) | 2021-09-14 |
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| CN202022904030.9U Active CN214194602U (en) | 2020-12-04 | 2020-12-04 | Precipitation structure suitable for deep foundation pit of high-pressure-bearing water-rich karst stratum |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114737589A (en) * | 2022-05-30 | 2022-07-12 | 中国二十二冶集团有限公司 | Foundation pit shallow layer drainage method |
| CN115142452A (en) * | 2022-06-14 | 2022-10-04 | 中国建筑第八工程局有限公司 | Foundation pit dewatering method for rock stratum geology |
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2020
- 2020-12-04 CN CN202022904030.9U patent/CN214194602U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114737589A (en) * | 2022-05-30 | 2022-07-12 | 中国二十二冶集团有限公司 | Foundation pit shallow layer drainage method |
| CN115142452A (en) * | 2022-06-14 | 2022-10-04 | 中国建筑第八工程局有限公司 | Foundation pit dewatering method for rock stratum geology |
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