CN116254862A - Foundation pit drainage system combined with deep foundation pit inner support - Google Patents
Foundation pit drainage system combined with deep foundation pit inner support Download PDFInfo
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- CN116254862A CN116254862A CN202310242368.8A CN202310242368A CN116254862A CN 116254862 A CN116254862 A CN 116254862A CN 202310242368 A CN202310242368 A CN 202310242368A CN 116254862 A CN116254862 A CN 116254862A
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- foundation pit
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/22—Adaptations of pumping plants for lifting sewage
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
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- Health & Medical Sciences (AREA)
- Structural Engineering (AREA)
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Abstract
The invention provides a foundation pit drainage system combined with a deep and large foundation pit inner support, wherein a steel foundation pit drainage vertical pipe is arranged on a first layer of a bridge plate of a foundation pit and close to a sedimentation tank, and extends into a base water collecting pit along a foundation pit supporting structure to realize water collection and clear drainage in the pit. The foundation pit steel drainage vertical pipe on the second/third concrete support of the foundation pit is connected with a steel drainage horizontal pipe which is communicated with the water collecting tank, and is used for collecting foundation pit precipitation and first-layer trestle plate surface water and draining the foundation pit precipitation and first-layer trestle plate surface water to the sedimentation tank through the submersible pump. The adjacent side positions of the first-layer pallet are provided with concrete water retaining ribs, a lateral steel drainage vertical pipe of the trestle is arranged, and the lateral steel drainage vertical pipe penetrates through the supporting beam lattice columns and then stretches into the water collecting tank to drain clear water in the first-layer pallet. Precipitation in the precipitation well in the foundation pit is pumped and discharged to a nearby water collecting tank through a precipitation pump, and finally discharged to a sedimentation tank. The invention is not affected by external construction environment, solves the problem of disordered arrangement of the drainage pipeline in the traditional foundation pit drainage system, and the drainage pipeline adopts a steel drainage pipe and cannot leak.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a foundation pit drainage system combined with a deep and large foundation pit inner support.
Background
Along with the rapid development of the construction industry, more and more complex foundation pits such as deep and large foundation pits are formed, the field construction form is changed to systemization and integration, and the original non-systemization foundation pit drainage mode is as follows: the foundation pit dewatering and the open water are collected to the water collecting well in the pit and then are pumped and discharged to the pit edge drainage ditch through the water pump, and the defects of disordered drainage pipeline arrangement, difficult operation and maintenance, running, drip leakage and the like exist in the mode, so that the requirements of the on-site green civilization construction management at the present stage cannot be met. In addition, in foundation pit construction of the cities along the river in the south and coasts, deep and large foundation pits containing inner support supporting structures are more and more, and the cities are often rich in underground water and abundant in rainfall, if an original non-systematic foundation pit drainage mode is adopted, the later-period operation and maintenance cost is high, the drainage pipeline loss is large, and the expected effect is difficult to achieve.
Therefore, the foundation pit drainage system combined with the support in the deep and large foundation pit is designed to solve the problems, meets the drainage requirement of the deep and large foundation pit in the field, and ensures the safety and stability of the foundation pit during construction.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a foundation pit drainage system combined with a support in a deep and large foundation pit, and the problems of disordered drainage pipeline arrangement, difficult operation and maintenance, running, leakage and the like of a traditional non-systematic drainage structure are effectively solved.
The present invention achieves the above technical object by the following means.
The foundation pit drainage system comprises a first layer of pallet, a second layer of concrete support and a third layer of concrete support, wherein the first layer of pallet, the second layer of concrete support and the third layer of concrete support are respectively arranged in the foundation pit, and comprise sedimentation tanks, drainage ditches and municipal drainage pipe networks which are arranged around the foundation pit and are mutually communicated; the steel drainage vertical pipe of the foundation pit in the second concrete support area and the third concrete support area is also connected with a steel drainage horizontal pipe which is connected with a submersible pump in the water collecting tank, and the foundation pit dewatering and the open water of the first layer trestle plate are collected and discharged to a sedimentation tank; the side edge position of the first layer trestle plate is also provided with a lateral drainage unit.
Further, the lateral drainage unit comprises a concrete water retaining ridge arranged at the edge position of the first-layer stack bridge plate, a trestle lateral steel drainage vertical pipe is arranged after the concrete water retaining ridge is perforated, one end of the trestle lateral steel drainage vertical pipe penetrates through the concrete water retaining ridge and then stretches into the first-layer trestle plate area, the other end of the trestle lateral steel drainage vertical pipe is laid along the supporting beam lattice column, penetrates through the supporting beam lattice column and then stretches into a water collecting tank in the second concrete support area and the third concrete support area for discharging clear water in the first-layer stack bridge plate to the water collecting tank, finally is discharged to a sedimentation tank outside a pit through a submersible pump, and is discharged into a municipal drainage pipe network after sedimentation.
Further, two trestle lateral steel drainage risers are arranged in each opposite supporting area in the foundation pit, and one trestle lateral steel drainage riser is arranged in each corner support area.
Further, the drainage ditch comprises a main groove body formed by building cement bricks, a PVC pipe is embedded in the main groove body, and the ground on two sides of the drainage ditch is hardened ground.
Further, two steel water collecting tank hangers are welded on two sides of the water collecting tank, and the water collecting tank is placed on the supporting beam through the water collecting tank hangers.
Further, the water collection boxes on the second concrete support and the third concrete support are identical in arrangement position and number, and are: two water collecting tanks are arranged in each opposite supporting area, and one water collecting tank is arranged in each corner support area.
Further, the precipitation of the precipitation well in the foundation pit is pumped and discharged into a nearby water collecting tank through a precipitation water pump, water is discharged to a sedimentation tank through a steel drainage horizontal pipe and a foundation pit steel drainage vertical pipe by utilizing a submersible pump in the water collecting tank, and is discharged into a municipal drainage pipe network after sedimentation, so that the precipitation collection and discharge in the pit are realized.
The invention has the following beneficial effects:
compared with the original non-systematic foundation pit drainage mode that the foundation pit dewatering and the open water are collected in the water collecting well in the pit and are drained into the pit edge drainage ditch through the water pump, the invention has the following advantages: (1) The method is not affected by external construction environment basically, and the problem of disordered arrangement of the drainage pipeline in the traditional foundation pit drainage method can be thoroughly solved; (2) The steel drain pipe is adopted for the drain pipe, so that maintenance is not required, the later operation and maintenance cost is greatly reduced, and the problems of running, falling, leakage and the like can be effectively avoided; (3) The later stage can be combined with the underground structure drainage system for continuous use, and the project cost can be greatly reduced.
Drawings
FIG. 1 is a schematic plan layout view of a drainage structure of a first layer trestle plate in a foundation pit;
FIG. 2 is a schematic plan view of a second concrete support drainage structure in a foundation pit;
FIG. 3 is a schematic view of a plan layout of a drainage structure of a first layer trestle plate in a foundation pit;
FIG. 4 is a schematic view of a second concrete support drainage structure in a foundation pit;
FIG. 5 is a partial cross-sectional view in the north-south direction of the in-pit drainage system;
FIG. 6 is an east-west partial cross-sectional view of a first deck landing stage deck with lateral drainage;
FIG. 7 is a schematic view of a drain structure;
fig. 8 is a schematic view of a header tank arrangement.
In the figure: 1-a sedimentation tank; 2-a steel drainage vertical pipe of the foundation pit; 3-trestle lateral steel drainage vertical pipes; 4-steel horizontal drainage pipes; 5-a water collecting tank; 6-drainage ditch; 7-supporting beams; 8-hardening the ground; 9-PVC pipe; 10-cement bricks; 11-retaining walls; 12-first layer pallet; 13-a foundation pit supporting structure; 14-supporting the lattice column; 15-a concrete water retaining ridge; 16-a second concrete support; 17-third concrete support; 18-a water collecting pit; 19-a water collecting tank hanging lug.
Detailed Description
The invention will be further described with reference to the drawings and the specific embodiments, but the scope of the invention is not limited thereto.
As shown in fig. 1, 2 and 5, the length of the construction object (foundation pit) in the embodiment in the east-west direction is 640m, the width of the construction object in the north-south direction is 170m, the excavation depth is 15.8m, the buried depth of underground water is 0.9m, three inner supports are designed in the foundation pit, and the three inner supports are respectively a first layer trestle plate 12, a second layer concrete support 16 and a third layer concrete support 17 which are used as a material yard and a temporary road in the field; municipal drainage pipe networks are arranged on the outer east and northwest sides of the foundation pit, and provincial cultural relics airport runways are arranged on the south side of the foundation pit, so that the municipal drainage pipe networks are not arranged.
As shown in fig. 1, 2 and 5, the foundation pit drainage system combined with the deep and large foundation pit inner support comprises a sedimentation tank 1, a foundation pit steel drainage vertical pipe 2, a trestle lateral steel drainage vertical pipe 3, a steel drainage horizontal pipe 4, a water collecting tank 5, a drainage ditch 6, a supporting beam 7, a PVC pipe 9, a concrete water retaining ridge 15 and a water collecting pit 18.
As shown in fig. 1 to 4, four sedimentation tanks 1 are arranged on the north side of the foundation pit, one sedimentation tank 1 is arranged on the east and west sides of the foundation pit, drainage ditches 6 are arranged on the periphery of the foundation pit, and the drainage ditches 6 are connected with the sedimentation tanks 1 and are used for removing water for cleaning and dust falling on the periphery of the foundation pit and precipitation and rainwater in the pit before a drainage system of the foundation pit is formed before a second concrete support 16 is constructed; as shown in fig. 7, the drainage ditch 6 comprises a main tank body built by cement bricks 10, a PVC pipe 9 is embedded in the main tank body to prevent the drainage ditch 6 from leaking water, and the ground at two sides of the drainage ditch 6 is treated as hardened ground 8.
As shown in fig. 1, 3 and 5, the positions, close to the sedimentation tanks 1, of the first layer pallet 12 are all provided with foundation pit steel drainage risers 2, wherein four foundation pit steel drainage risers 2 are arranged at the positions, close to the east, of the two sedimentation tanks 1 on the north side of the foundation pit, and two foundation pit steel drainage risers 2 are arranged at the positions of the rest sedimentation tanks 1. One end of the foundation pit steel drainage vertical pipe 2 penetrates through the retaining wall 11 and then bends and stretches into the sedimentation tank 1, and the other end of the foundation pit steel drainage vertical pipe downwards extends along the foundation pit supporting structure 13 until reaching into the water collecting pit 18 of the substrate, is connected with a sewage pump in the water collecting pit 18 and is used for achieving the water collecting and draining function in the pit. In the actual construction project, when rainy days or flood season come, open-cut sump 18 in the pit is arranged in the position close to the steel drain riser 2 of the foundation pit in the foundation pit, and other positions far away from the open-cut sump are connected with the sump 18 by adopting open-cut drain.
As shown in fig. 4 and 5, the steel drainage vertical pipe 2 of the foundation pit located in the second concrete support 16 and the third concrete support 17 is also connected with a steel drainage horizontal pipe 4, the second concrete support 16 and the third concrete support 17 are respectively provided with a plurality of water collection tanks 5, the steel drainage horizontal pipe 4 is connected with a submerged pump in the water collection tanks 5, the water collection tanks 5 are used for collecting foundation pit precipitation and open water of the first-layer trestle plates 12, and finally the foundation pit precipitation and the open water are discharged to the sedimentation tank 1 outside the pit through the submerged pump and discharged into a municipal drainage pipe network after sedimentation. After the foundation slab is constructed, the water collection tank 5 is replaced by a formal water collection well of the building.
As shown in fig. 2, 3 and 6, the adjacent edge positions of the first-layer trestle plate 12 are respectively provided with a concrete water retaining ridge 15 with the thickness of 200mm and the height of 300mm, after the concrete water retaining ridge 15 is perforated, a trestle lateral steel drainage vertical pipe 3 is installed, one end of the trestle lateral steel drainage vertical pipe 3 penetrates through the concrete water retaining ridge 15 and then stretches into the area of the first-layer trestle plate 12, the other end of the trestle lateral steel drainage vertical pipe is laid along an original supporting beam lattice column 14 in a foundation pit (the supporting beam lateral steel drainage vertical pipe 3 is convenient to fix), penetrates through the supporting beam lattice column 14 and then stretches into a water collecting tank 5 in the area of a second concrete support 16 and a third concrete support 17, and is used for discharging clear water in the first-layer trestle plate 12 to the water collecting tank 5, and finally draining to a sedimentation tank 1 outside a pit through a submersible pump and discharging into a municipal drainage pipe network after sedimentation, so that the lateral drainage function of the first-layer trestle plate 12 is realized. Two trestle lateral steel drainage risers 3 are arranged in each south-north opposite bracing region in the foundation pit, and one trestle lateral steel drainage riser 3 is arranged in each corner support region.
The water collection tank 5 is welded on site by adopting a thick steel plate with the thickness of 5mm in combination with the surrounding space of each supporting beam 7 (comprising a second concrete support 16 and a third concrete support 17) on site, the volume of 3m meets the requirement of the supporting beam 7 on the bearing capacity, a ball float valve is arranged in the water collection tank, and after the water reaches a set water level, the water pump is started to drain. As shown in fig. 8, two steel water collecting tank hangers 19 are welded on two sides of the water collecting tank 5, and the water collecting tank 5 is placed on the supporting beam 7 through the water collecting tank hangers 19; the water collection tanks 5 on the second concrete support 16 and the third concrete support 17 are arranged in the same positions, and are all: two water collection tanks 5 are arranged in each north-south opposite bracing region, and one water collection tank 5 is arranged in each corner support region.
Precipitation well precipitation in the foundation ditch is discharged into the header tank 5 nearby through the precipitation water pump, then utilizes the immersible pump to pass through steel drainage flat pipe 4, foundation ditch steel drainage riser 2 that lay on supporting beam 7 with water and arranges to sedimentation tank 1, discharges municipal drainage pipe network after depositing, and then realizes in the pit precipitation and gathers the outer function of arranging.
In the embodiment, steel pipelines which are DN150 are adopted as the foundation pit steel drainage vertical pipe 2, the trestle lateral steel drainage vertical pipe 3 and the steel drainage horizontal pipe 4; the PVC pipe diameter is 400mm.
The examples are preferred embodiments of the present invention, but the present invention is not limited to the above-described embodiments, and any obvious modifications, substitutions or variations that can be made by one skilled in the art without departing from the spirit of the present invention are within the scope of the present invention.
Claims (7)
1. The foundation pit drainage system combined with the deep and large foundation pit inner support is characterized by comprising a sedimentation tank (1), a drainage ditch (6) and a municipal drainage pipe network which are arranged around the foundation pit and are mutually communicated, wherein a foundation pit steel drainage riser (2) is arranged at the position, close to the sedimentation tank (1), of the first layer of the foundation pit inner support, one end of the foundation pit steel drainage riser (2) penetrates through a retaining wall (11) and then bends and stretches into the sedimentation tank (1), the other end of the foundation pit steel drainage riser (2) downwards extends into a water collecting pit (18) of a substrate along a foundation pit supporting structure (13) and is connected with a sewage pump in the water collecting pit (18) to realize water collection and surface drainage in the pit; the steel drainage vertical pipes (2) of the foundation pit positioned in the areas of the second concrete support (16) and the third concrete support (17) are also connected with steel drainage horizontal pipes (4), the steel drainage horizontal pipes (4) are connected with the submerged pump in the water collecting tank (5), and the foundation pit dewatering and the open water of the first layer trestle plate (12) are collected and discharged to the sedimentation tank (1); the adjacent edge position of the first layer pallet (12) is also provided with a lateral drainage unit.
2. The foundation pit drainage system combined with the deep foundation pit inner support according to claim 1, wherein the lateral drainage unit comprises a concrete water retaining ridge (15) arranged at the adjacent edge position of the first layer of bridge deck (12), a trestle lateral steel drainage vertical pipe (3) is installed after the concrete water retaining ridge (15) is perforated, one end of the trestle lateral steel drainage vertical pipe (3) penetrates through the concrete water retaining ridge (15) and then stretches into the area of the first layer of bridge deck (12), the other end of the trestle lateral steel drainage vertical pipe is laid along a supporting beam lattice column (14), penetrates through the supporting beam lattice column (14) and then stretches into a water collecting tank (5) in the area of the second concrete support (16) and the third concrete support (17) for discharging clear water in the first layer of bridge deck (12) to the water collecting tank (5), finally, and finally, the trestle lateral steel drainage vertical pipe (3) penetrates through a submerged pump to an out-pit sedimentation tank (1) and is discharged into a municipal drainage pipe network after sedimentation.
3. Foundation pit drainage system in combination with deep foundation pit supports according to claim 2, characterized in that two trestle lateral steel drainage risers (3) are arranged in each opposite bracing area in the foundation pit, and one trestle lateral steel drainage riser (3) is arranged in each gusset area.
4. The foundation pit drainage system combined with the deep foundation pit inner support according to claim 1, wherein the drainage ditch (6) comprises a main groove body built by cement bricks (10), a PVC pipe (9) is embedded in the main groove body, and the ground on two sides of the drainage ditch (6) is hardened ground (8).
5. The foundation pit drainage system combined with the deep foundation pit inner support according to claim 1, wherein two steel water collecting tank hangers (19) are welded on two sides of the water collecting tank (5), and the water collecting tank (5) is placed on the support beam (7) through the water collecting tank hangers (19).
6. The foundation pit drainage system combined with the deep foundation pit inner support according to claim 1, wherein the arrangement positions and the numbers of the water collection tanks (5) on the second concrete support (16) and the third concrete support (17) are the same, and the water collection tanks are: two water collection tanks (5) are arranged in each pair of supporting areas, and one water collection tank (5) is arranged in each corner support area.
7. The foundation pit drainage system combined with the deep foundation pit inner support according to claim 1, wherein the precipitation well precipitation in the foundation pit is pumped into a nearby water collection tank (5) by a precipitation pump, water is discharged to a sedimentation tank (1) by a submersible pump in the water collection tank (5) through a steel drainage horizontal pipe (4) and a foundation pit steel drainage vertical pipe (2), and is discharged into a municipal drainage pipe network after sedimentation, so that the water collection and the drainage in the pit are realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310242368.8A CN116254862A (en) | 2023-03-14 | 2023-03-14 | Foundation pit drainage system combined with deep foundation pit inner support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310242368.8A CN116254862A (en) | 2023-03-14 | 2023-03-14 | Foundation pit drainage system combined with deep foundation pit inner support |
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| CN116254862A true CN116254862A (en) | 2023-06-13 |
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| CN202310242368.8A Pending CN116254862A (en) | 2023-03-14 | 2023-03-14 | Foundation pit drainage system combined with deep foundation pit inner support |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205475275U (en) * | 2016-03-14 | 2016-08-17 | 中国建筑第八工程局有限公司 | Landing stage face rainwater collection heat -extraction system |
| CN206503069U (en) * | 2016-12-29 | 2017-09-19 | 上海建工二建集团有限公司 | trestle drainage system |
| KR20190053670A (en) * | 2017-11-10 | 2019-05-20 | 이성원 | Bridge drainage system and construction method using the same |
| CN210712893U (en) * | 2019-07-30 | 2020-06-09 | 中国建筑第八工程局有限公司 | Drainage integration system falls in deep basal pit |
| CN214302121U (en) * | 2020-10-09 | 2021-09-28 | 上海三彩科技发展有限公司 | Water seepage collecting box mounted on side face of water collecting well |
| CN113463670A (en) * | 2021-09-02 | 2021-10-01 | 中铁十八局集团第五工程有限公司 | Water pumping and draining method and water pumping and draining structure for deep foundation pit bottom plate construction |
| CN214657152U (en) * | 2021-03-18 | 2021-11-09 | 解廷伟 | Foundation pit drainage system |
| CN218405038U (en) * | 2022-09-09 | 2023-01-31 | 中建八局浙江建设有限公司 | Landing stage board ponding collection processing apparatus |
-
2023
- 2023-03-14 CN CN202310242368.8A patent/CN116254862A/en active Pending
Patent Citations (8)
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| CN205475275U (en) * | 2016-03-14 | 2016-08-17 | 中国建筑第八工程局有限公司 | Landing stage face rainwater collection heat -extraction system |
| CN206503069U (en) * | 2016-12-29 | 2017-09-19 | 上海建工二建集团有限公司 | trestle drainage system |
| KR20190053670A (en) * | 2017-11-10 | 2019-05-20 | 이성원 | Bridge drainage system and construction method using the same |
| CN210712893U (en) * | 2019-07-30 | 2020-06-09 | 中国建筑第八工程局有限公司 | Drainage integration system falls in deep basal pit |
| CN214302121U (en) * | 2020-10-09 | 2021-09-28 | 上海三彩科技发展有限公司 | Water seepage collecting box mounted on side face of water collecting well |
| CN214657152U (en) * | 2021-03-18 | 2021-11-09 | 解廷伟 | Foundation pit drainage system |
| CN113463670A (en) * | 2021-09-02 | 2021-10-01 | 中铁十八局集团第五工程有限公司 | Water pumping and draining method and water pumping and draining structure for deep foundation pit bottom plate construction |
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