CN220746977U - Foundation pit plugging water-stopping precipitation system - Google Patents
Foundation pit plugging water-stopping precipitation system Download PDFInfo
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- CN220746977U CN220746977U CN202322282721.3U CN202322282721U CN220746977U CN 220746977 U CN220746977 U CN 220746977U CN 202322282721 U CN202322282721 U CN 202322282721U CN 220746977 U CN220746977 U CN 220746977U
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- 238000001556 precipitation Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000007787 solid Substances 0.000 claims description 19
- 238000009412 basement excavation Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000003809 water extraction Methods 0.000 abstract 1
- 238000005086 pumping Methods 0.000 description 12
- 238000010276 construction Methods 0.000 description 9
- 239000003673 groundwater Substances 0.000 description 5
- 230000009189 diving Effects 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 102000001999 Transcription Factor Pit-1 Human genes 0.000 description 2
- 108010040742 Transcription Factor Pit-1 Proteins 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000006837 decompression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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Abstract
The utility model provides a foundation pit plugging water-stopping precipitation system, and belongs to the technical field of foundation pit water-stopping precipitation. The water-stop dewatering system comprises a non-bottom-falling type waterproof curtain and an elevator well plugging structure, wherein the elevator well plugging structure is arranged in the non-bottom-falling type waterproof curtain, a plurality of shallow wells in pits are further arranged in gaps between the non-bottom-falling type waterproof curtain and the elevator well plugging structure, a plurality of deep wells outside the pits are arranged around the periphery of the non-bottom-falling type waterproof curtain, water pumps are arranged in the shallow wells and the deep wells outside the pits, the water pumps are respectively connected with municipal drainage pipelines through drainage pipes, the arrangement of the deep wells outside the pits is not only beneficial to self protection of dewatering wells, but also facilitates earth excavation in the pits, influences of foundation pit dewatering on surrounding environments can be furthest reduced in the dewatering process, the elevator well adopts a five-face plugging structure, water drop depth and water extraction quantity of the deep wells outside the pits can be remarkably reduced, and the underground water resources and the surrounding environments can be protected.
Description
Technical Field
The utility model relates to the technical field of foundation pit water stop precipitation, in particular to a foundation pit plugging water stop precipitation system.
Background
With the rapid development of economy, the expansion of cities and the dense population, the demands of people on underground space are increasing, the development of underground space is well-developed, and foundation pit engineering is inevitably involved. The existing foundation pit groundwater water-stop precipitation structure generally adopts a precipitation well arranged inside a waterproof curtain to carry out precipitation work, in the construction process, due to the fact that the number of work types in the pit is large, earthwork excavation and transportation are involved, the condition that the precipitation well is damaged frequently occurs, the earthwork excavation and transportation often needs to use large-scale mechanical equipment, the pit interior precipitation well and drainage facilities thereof can cause certain influence on earthwork excavation and transportation machinery, and meanwhile, the existing precipitation well is easy to cause groundwater loss of an upper layer of water-retaining layer and a diving stratum in the use process to cause influence on the surrounding environment of the foundation pit.
Disclosure of Invention
In order to overcome the defects, the utility model provides a foundation pit plugging water-stopping precipitation system which is used for solving the problems.
The utility model is realized in the following way:
the utility model provides a foundation ditch shutoff stagnant water precipitation system, includes non-bottom-falling type stagnant water curtain, elevator shaft shutoff structure sets up the inside of non-bottom-falling type stagnant water curtain still be provided with a plurality of in-pit shallow well in the clearance between non-bottom-falling type stagnant water curtain with the elevator shaft shutoff structure the periphery of non-bottom-falling type stagnant water curtain encircles and is provided with a plurality of in-pit deep well outward, be equipped with the suction pump in-pit shallow well and the in-pit deep well outward, the suction pump is connected with municipal drainage pipe through the drain pipe respectively.
In one embodiment of the utility model, the bottom of the non-bottom-falling waterproof curtain is located inside a confined aquifer and does not penetrate the confined aquifer.
In one embodiment of the utility model, the deep well outside the pit comprises a solid pipe a and a filter pipe a, wherein the filter pipe a is vertically arranged in a confined aquifer, the solid pipe a is vertically arranged in an upper water-retaining layer, a submerged stratum and a water-resisting layer, and the bottom of the solid pipe a is connected with the top of the filter pipe a.
In one embodiment of the utility model, the shallow well in the pit comprises a solid pipe b and a filter pipe b, wherein the filter pipe b is vertically arranged in a submerged stratum, the solid pipe b is vertically arranged in an upper water-retaining layer, and the bottom of the solid pipe b is connected with the top of the filter pipe b.
In one embodiment of the utility model, the shallow in-pit well includes, but is not limited to, a vacuum well point, a pipe well, or a jet well point.
In one embodiment of the utility model, the elevator hoistway plugging structure is a five sided enclosure structure.
In one embodiment of the utility model, a water meter is provided on the drain pipe.
The beneficial effects of the utility model are as follows:
1. through setting up the outer deep well of hole in non-bottom-falling type waterproof curtain periphery, reduced the density of inside precipitation well of foundation ditch and drainage pipe, except can reduce the damage of earth excavation and transport work progress to precipitation well and do benefit to precipitation well self protection, also be convenient for simultaneously large-scale mechanical equipment carry out earth excavation and transport, avoid causing the influence to large-scale mechanical equipment's construction, promoted the convenience of construction.
2. The solid pipe b of the deep well outside the pit is positioned in the upper water-retaining layer diving stratum and the water-resisting layer, so that the underground water loss of the upper water-retaining layer and the diving stratum can not be caused; the filter pipe a of the deep well outside the pit is positioned in a confined aquifer, the extracted groundwater is water in the confined aquifer, the pumping object is clear, pumping is carried out as required, as long as the requirement of anti-surging stability of the pit bottom is met, the influence of the foundation pit dewatering on the surrounding environment is reduced to the greatest extent, the shallow well solid pipe b in the pit is positioned in an upper water-retaining layer, and the upper water-retaining layer can adopt water collection and open drainage; the filter pipe b is positioned in a submerged stratum, the submerged water can be drained, the dewatering method is highly targeted, the elevator shaft adopts a five-face blocking structure, the water level depth and the water pumping quantity of a deep well outside a pit can be obviously reduced, and the underground water resource and the surrounding environment can be protected.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic plan layout structure of a foundation pit plugging water-stopping precipitation system according to an embodiment of the present utility model;
fig. 2 is a schematic cross-sectional structure diagram of a foundation pit plugging water-stopping precipitation system according to an embodiment of the utility model.
In the figure: 1. a non-bottom-falling waterproof curtain; 2. deep wells outside the pit; 21. a solid pipe a; 22. a filter tube a; 3. shallow wells in the pit; 31. a solid pipe b; 32. a filter tube b; 4. an elevator shaft plugging structure; 5. municipal drainage pipelines; 6. a drain pipe; 7. a water meter; 8. the water level of the pressure-bearing water; 9. an upper stagnant water layer; 10. diving the stratum; 11. a water-resistant layer; 12. and a confined aquifer.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.
As shown in fig. 1-2, the present utility model provides a technical solution: the foundation pit plugging water-stopping precipitation system comprises a non-bottom-falling type water-stopping curtain 1 and an elevator well plugging structure 4, wherein the bottom of the non-bottom-falling type water-stopping curtain 1 is positioned in a confined aquifer 12 and does not penetrate the confined aquifer 12, the elevator well plugging structure 4 is arranged in the non-bottom-falling type water-stopping curtain 1, a plurality of shallow wells 3 in pits are further arranged in a gap between the inner part of the non-bottom-falling type water-stopping curtain 1 and the elevator well plugging structure 4, and a plurality of deep wells 2 outside the pits are circumferentially arranged on the periphery of the non-bottom-falling type water-stopping curtain 1.
It should be noted that, the bottom of the non-bottom-falling waterproof curtain 1 does not enter the waterproof layer 11, a seepage channel with a certain height is reserved, the deep well 2 outside the pit is a dewatering well arranged outside the non-bottom-falling waterproof curtain 1 and used for decompressing and dewatering the confined aquifer 12 so as to ensure that the stability of the anti-surging of the pit bottom meets the standard requirement, the shallow well 3 inside the pit is arranged inside the non-bottom-falling waterproof curtain 1 and used for dewatering the submerged stratum 10, the deep well 2 outside the pit is arranged outside the pit and is beneficial to self protection of the dewatering well, and the pit is convenient for earth excavation, the elevator well adopts a five-face blocking structure, so that the water level descending depth and the water pumping quantity of the deep well 2 outside the pit can be obviously reduced, the underground water resource and the surrounding environment can be protected, and the method is suitable for foundation pit engineering with loose surrounding environment, the possibility of surging damage of the pit bottom and the submerged stratum 10 needing dewatering.
It should be noted that, the non-bottom-falling waterproof curtain includes, but is not limited to, equal-thickness cement soil mixing wall, underground diaphragm wall and bored pile using TRD construction method and CMS construction method.
The method comprises the steps of firstly constructing a row of non-bottom-falling waterproof curtains 1 with closed periphery along the periphery of a foundation pit, constructing an elevator shaft plugging structure 4 in an elevator shaft area, arranging a plurality of deep wells 2 outside pits outside the non-bottom-falling waterproof curtains 1, arranging a plurality of shallow wells 3 inside the pits inside the non-bottom-falling waterproof curtains 1, correspondingly opening dewatering wells (shallow wells 3 inside the pits and/or deep wells 2 outside the pits) in a certain range of the soil excavation area and the vicinity thereof according to the sequence of the soil excavation area of the foundation pit, finally excavating the foundation pit to the bottom, constructing a cushion layer and a bottom plate, constructing members such as basement beams, plates, columns and the like layer by layer, and closing the dewatering wells (shallow wells 3 inside the pits and/or deep wells 2 outside the pits) after the basement structure construction is completed and the anti-floating structure meets the design requirement, and stopping pumping water.
In the above example, the deep well 2 outside the pit is suitable for the condition that the checking calculation of the anti-surge at the pit bottom does not meet the standard requirement, namely, when the formula (1) is met, decompression precipitation is needed;
wherein:
K ty the anti-surge safety coefficient is generally not less than 1.20 according to the related specification;
d, the distance (m) from the foundation pit bottom to the top plate of the confined aquifer 12;
average natural weight (kN/m) of soil in the gamma-D range 3 )；
H w -a pressure water head height (m);
γ w -the water gravity (kN/m) 3 )。
The number, the interval and the depth of the deep wells 2 outside the pit are calculated and determined according to the area of the foundation pit, the water quantity of the confined aquifer 12, the permeability coefficient and the condition of the water level 8 of the confined water; the number and the interval of the shallow wells 3 in the pit are calculated and determined according to the area of the foundation pit, the water quantity of the submerged stratum 10, the permeability coefficient and the water level of the submerged stratum 10, wherein the shallow wells 3 in the pit comprise, but are not limited to, vacuum well points, pipe wells or jet well points.
In one embodiment, a water pump is arranged in the shallow pit 3 and the deep pit 2 outside the pit, the water pump is connected with a municipal drainage pipeline 5 through a drainage pipe 6 respectively and is used for dewatering the shallow pit 3 and the deep pit 2 outside the pit, and a water meter 7 for detecting flow is arranged on the drainage pipe 6.
In addition, the water pumping amount of the dewatering well (shallow well 3 in the pit and/or deep well 2 outside the pit) is proper to meet the actual requirement of the excavation surface, the water pumping principle is followed as required, the pumping amount of groundwater is reduced as much as possible, and the influence degree on the surrounding environment of the foundation pit is reduced.
The solid pipe a of the deep well 2 outside the pit and the solid pipe b of the shallow well 3 inside the pit are pipes without water filtering holes, and the filter pipe a of the deep well 2 outside the pit and the filter pipe b of the shallow well 3 inside the pit are pipes with water filtering holes.
As shown in fig. 1-2, the elevator shaft plugging structure 4 is a five-sided enclosing structure and is used for plugging pressure-bearing water at pit positions in an elevator shaft pit.
In one embodiment, the elevator shaft pentahedral blocking structure includes, but is not limited to, a pentahedral enclosure formed using high pressure jet grouting piles or cement mixing piles.
Specifically, the elevator shaft adopts a five-sided plugging structure, so that the water level drop depth and the water pumping quantity of the deep well 2 outside the pit can be obviously reduced, and the underground water resource and the surrounding environment can be protected.
Specifically, this foundation ditch shutoff stagnant water precipitation system's theory of operation: the real pipe a21 of the deep well 2 outside the pit is positioned in the submerged stratum 10 and the waterproof layer 11 of the upper water-retaining layer 9, so that the underground water loss of the upper water-retaining layer 9 and the submerged stratum 10 can not be caused; the filter pipe a22 of the deep well 2 outside the pit is positioned in the confined aquifer 12, the extracted groundwater is water in the confined aquifer 12, pumping objects are definite, pumping is carried out as required, as long as the requirement of anti-surging stability of the pit bottom is met, the influence of foundation pit dewatering on the surrounding environment is reduced to the greatest extent, the solid pipe b31 of the shallow well 3 in the pit is positioned in the upper layer water stagnation layer 9, and the upper layer water stagnation can adopt water collection for open drainage; the filter tube b32 is positioned in the submerged stratum 10, the submerged water can be drained, the dewatering method is highly targeted, the elevator shaft adopts a five-face plugging structure, the water level depth and the water pumping quantity of the deep well 2 outside the pit can be obviously reduced, the underground water resource and the surrounding environment can be protected, meanwhile, the deep well 2 outside the pit is arranged at the periphery of the non-bottom-falling waterproof curtain 1, the density of a dewatering well and a drain pipe 6 channels inside a foundation pit is reduced, the damage of the dewatering well caused by the earthwork excavation construction process can be reduced, the self protection of the dewatering well is facilitated, the earthwork excavation of large mechanical equipment is facilitated, the influence on the construction of the large mechanical equipment is avoided, and the convenience of construction is improved.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (7)
1. The utility model provides a foundation ditch shutoff stagnant water precipitation system, includes non-bottom type stagnant water curtain (1), elevartor shaft plugging structure (4), its characterized in that: the elevator well plugging structure (4) is arranged in the non-bottom-falling waterproof curtain (1), a plurality of shallow wells (3) in pits are further arranged in gaps between the non-bottom-falling waterproof curtain (1) and the elevator well plugging structure (4), a plurality of deep wells (2) outside the pits are arranged around the periphery of the non-bottom-falling waterproof curtain (1), and water pumps are arranged in the shallow wells (3) in the pits and the deep wells (2) outside the pits and are connected with municipal drainage pipelines (5) through drainage pipes (6) respectively.
2. A foundation pit plugging water stop precipitation system according to claim 1, wherein the bottom of said non-bottoming water stop curtain (1) is located inside a confined aquifer (12) and does not penetrate said confined aquifer (12).
3. The foundation pit plugging water-stopping precipitation system according to claim 1, wherein the deep well (2) outside the pit comprises a solid pipe a (21) and a filter pipe a (22), wherein the filter pipe a (22) is vertically arranged in a confined aquifer (12), and the solid pipe a (21) is vertically arranged in an upper water-retaining layer (9), a submerged stratum (10) and a water-resisting layer (11), and the bottom of the solid pipe a (21) is connected with the top of the filter pipe a (22).
4. The foundation pit plugging water-stopping precipitation system according to claim 1, wherein the shallow well (3) in the pit comprises a solid pipe b (31) and a filter pipe b (32), wherein the filter pipe b (32) is vertically arranged in a submerged stratum (10), the solid pipe b (31) is vertically arranged in an upper water-retaining layer (9), and the bottom of the solid pipe b is connected with the top of the filter pipe b (32).
5. A foundation pit plugging water and precipitation system according to claim 4, wherein said shallow in pit well (3) comprises, but is not limited to, a vacuum well point, a pipe well or a jet well point.
6. A foundation pit plugging water-stopping precipitation system according to claim 1, wherein the elevator shaft plugging structure (4) is a five-sided enclosure structure.
7. A foundation pit plugging water stop precipitation system according to any of claims 1-6, wherein a water meter (7) is provided on said drain pipe (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322282721.3U CN220746977U (en) | 2023-08-24 | 2023-08-24 | Foundation pit plugging water-stopping precipitation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322282721.3U CN220746977U (en) | 2023-08-24 | 2023-08-24 | Foundation pit plugging water-stopping precipitation system |
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| CN220746977U true CN220746977U (en) | 2024-04-09 |
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|---|---|---|---|
| CN202322282721.3U Active CN220746977U (en) | 2023-08-24 | 2023-08-24 | Foundation pit plugging water-stopping precipitation system |
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| Country | Link |
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| CN (1) | CN220746977U (en) |
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- 2023-08-24 CN CN202322282721.3U patent/CN220746977U/en active Active
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