CN114737589A - Foundation pit shallow layer drainage method - Google Patents

Foundation pit shallow layer drainage method Download PDF

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Publication number
CN114737589A
CN114737589A CN202210595663.7A CN202210595663A CN114737589A CN 114737589 A CN114737589 A CN 114737589A CN 202210595663 A CN202210595663 A CN 202210595663A CN 114737589 A CN114737589 A CN 114737589A
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CN
China
Prior art keywords
water
foundation pit
water collecting
drainage
pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210595663.7A
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Chinese (zh)
Inventor
孙鹏
张彦平
祝贺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China 22MCC Group Corp Ltd
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China 22MCC Group Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by China 22MCC Group Corp Ltd filed Critical China 22MCC Group Corp Ltd
Priority to CN202210595663.7A priority Critical patent/CN114737589A/en
Publication of CN114737589A publication Critical patent/CN114737589A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D19/00Keeping dry foundation sites or other areas in the ground
    • E02D19/06Restraining of underground water
    • E02D19/12Restraining of underground water by damming or interrupting the passage of underground water
    • E02D19/20Restraining of underground water by damming or interrupting the passage of underground water by displacing the water, e.g. by compressed air
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D19/00Keeping dry foundation sites or other areas in the ground
    • E02D19/06Restraining of underground water
    • E02D19/10Restraining of underground water by lowering level of ground water
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F3/00Sewer pipe-line systems
    • E03F3/04Pipes or fittings specially adapted to sewers
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/04Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/10Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/10Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
    • E03F5/105Accessories, e.g. flow regulators or cleaning devices
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/14Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/22Adaptations of pumping plants for lifting sewage
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H17/00Fencing, e.g. fences, enclosures, corrals
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/20Controlling water pollution; Waste water treatment

Abstract

The invention provides a foundation pit shallow drainage method, and relates to the technical field of drainage. The method comprises the following steps: the water collecting wells are arranged at the end corners of the bottom of the foundation pit and along the inner side edge of the foundation pit, drainage ditches are formed between the adjacent water collecting wells, reverse filter layers are arranged in the drainage ditches to cover the water collecting pipes in a concealed mode, water filtering holes are formed in the water collecting pipes, so that water in the foundation pit flows into the water collecting pipes through the water filtering holes, and then is introduced into the water collecting wells on the two sides through the water collecting pipes. Water in the water collecting well is pumped to the water pumping pipe through the water pump and is introduced into the water drainage main pipe through the water pumping pipe, and water in the water drainage main pipe is gathered into the water outlet pipe and is discharged into the sedimentation tank through the water outlet pipe for sedimentation. According to the method, the mode of hidden laying of the water collecting pipes is adopted, open ditches are not arranged in the foundation pit, the interference to construction is reduced, meanwhile, the ditch walls of the drainage ditches are prevented from collapsing or forming quicksand, the dewatering effect is better, the dewatering efficiency is improved, and the water resource is recycled by arranging the sedimentation tank.

Description

Foundation pit shallow layer drainage method
Technical Field
The invention relates to the technical field of drainage, in particular to a foundation pit shallow drainage method.
Background
At present, the traditional construction method for draining the shallow layer of the foundation pit is to collect water and drain the water obviously, a drainage ditch is arranged at the bottom of the foundation pit, and the accumulated water in the foundation pit is drained through the drainage ditch. But set up the escape canal and can influence workman's construction, reduce labor efficiency, and the ditch wall collapses or forms the quicksand easily, leads to precipitation effect poor. The equipment in the traditional method is not easy to install and has low construction speed, and most components can not be used in a turnover way, thereby wasting manpower and materials. The direct municipal rainwater pipeline that is discharged into as waste water of foundation ditch normal water does not collect the utilization, causes the water waste.
Disclosure of Invention
In view of the above, the present invention provides a method for draining water from a shallow portion of a foundation pit to solve the above problem.
Based on the purpose, the invention provides a foundation pit shallow layer drainage method, which comprises the following steps:
and S1, arranging water collecting wells at the corners of the bottom end of the foundation pit and along the edge of the inner side of the foundation pit.
And S2, arranging drainage ditches between the adjacent water collecting wells.
S3, arranging a reverse filter layer in the drainage ditch to hide and coat the water collecting pipe, and arranging water filtering holes on the water collecting pipe, so that water in the foundation pit flows into the water collecting pipe through the water filtering holes and then is introduced into the water collecting wells on the two sides through the water collecting pipe.
And S4, pumping water in the water collecting well into a water pumping pipe through a water pump, and introducing the water into a drainage main pipe through the water pumping pipe.
And S5, collecting the water in the drainage main pipe into a water outlet pipe, and discharging the water into a sedimentation tank for sedimentation through the water outlet pipe.
Compared with the prior art, the invention has the beneficial effects that:
1. the structure that adopts the collector pipe to apply secretly does not have the open drain in the foundation ditch, has reduced the interference to the construction, prevents simultaneously that escape canal ditch wall from collapsing or forming the quicksand, therefore the precipitation effect is better, has improved foundation ditch precipitation efficiency.
2. Water in the foundation pit finally enters a sedimentation tank for sedimentation treatment, and the treated water is collected in a centralized manner and used as engineering construction water, so that the water resource is recycled, the engineering cost is greatly reduced, and energy and water conservation are realized.
3. The invention has the advantages of low cost of the used materials, repeated cyclic utilization of each component, material saving and construction cost reduction.
Further, S1 specifically includes: and water collecting wells are respectively arranged at four end angles of the bottom of the foundation pit, and one water collecting well is arranged along the edge of the inner side of the foundation pit every 30-40 meters.
Furthermore, the distance between the edge of the drainage ditch and the slope foot of the foundation pit is more than or equal to 0.3m, and the width of the drainage ditch is more than or equal to 0.3 m.
Further, the water filtering holes are arranged in a quincunx shape.
Furthermore, the water collecting pipe is wound with a reverse filtering cloth for preventing the sand from entering the water collecting pipe.
Furthermore, the bottom surface of the water collecting pipe is 0.3-0.5 m lower than the bottom of the foundation pit, and the end part of the water collecting pipe is 0.5-1 m higher than the adjacent water collecting well.
Drawings
FIG. 1 is a schematic construction diagram of a shallow drainage method for a foundation pit according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic view of a water collecting pipe of a shallow drainage method for a foundation pit according to an embodiment of the present invention;
fig. 4 is a cross-sectional view taken along line B-B of fig. 1.
Description of the drawings are labeled: 1. a water collecting well; 2. a drainage ditch; 3. an inverted filter layer; 4. a water collection pipe; 5. a water pump; 6. a water pumping pipe; 7. a drainage main pipe; 8. a water outlet pipe; 9. a sedimentation tank; 10. a filter cloth; 11. a support; 12. a guard rail; 13. a water pump switch box; 14. a gravel filtering layer; 15. a foundation pit; 16. and (5) filtering the water.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to specific embodiments below.
As shown in fig. 1, the method for draining water from a shallow layer of a foundation pit provided by the invention comprises the following steps:
s1, water collecting wells 1 are respectively arranged at four end angles of the bottom of the foundation pit 15, and one water collecting well 1 is arranged along the inner side edge of the foundation pit 15 every 30-40 meters.
S2, arranging drainage ditches 2 between the adjacent water collecting wells 1, wherein the distance between the edge of each drainage ditch 2 and the toe of the foundation pit 15 is more than or equal to 0.3m, and the width of each drainage ditch 2 is more than or equal to 0.3 m.
S3, as shown in FIG. 2, a reverse filter layer 3 is provided in the drainage ditch 2, and the reverse filter layer 3 is formed by laying sand. The inside of the reverse filtering layer 3 is covered with a water collecting pipe 4, and two ends of the water collecting pipe 4 are respectively connected to the water collecting wells 1 on two sides. There is not open ditch in foundation ditch 15, has reduced the interference to the construction, prevents simultaneously that 2 ditch walls in escape canal from collapsing or forming the quicksand, therefore the precipitation effect is better, has improved 15 precipitation efficiency in foundation ditch. As shown in fig. 3, the water collecting pipe 4 is provided with water filtering holes 16 arranged in a quincunx shape, so that water in the foundation pit 15 flows into the water collecting pipe 4. The outer wall of the water collecting pipe 4 is wound with the anti-filtering cloth 10, and the anti-filtering cloth 10 is wound for 2 circles, so that the water filtering holes 16 in the water collecting pipe 4 are prevented from being blocked by sand and stone soil, and normal drainage is prevented from being influenced. The bottom surface of the water collecting pipe 4 is 0.3 to 0.5 meter lower than the bottom of the foundation pit 15, and the end part of the water collecting pipe 4 is 0.5 to 1 meter higher than the adjacent water collecting well 1. The water in the foundation pit 15 flows into the water collecting pipe 4 through the water filtering holes 16 and is introduced into the water collecting wells 1 on both sides through the water collecting pipe 4.
S4, as shown in figure 4, a water pump 5 is installed in the water collecting well 1, the water pump 5 is connected with one end of a water pumping pipe 6, and the other end of the water pumping pipe 6 is connected with a drainage main pipe 7. The water pump 5 is electrically connected with the water pump switch box 13, and the water pump switch box 13 is arranged on the foundation pit 15, so that an operator can control the switch of the water pump 5, and the drainage in the foundation pit 15 can be controlled. The water flowing into the water collecting well 1 is pumped out to the water pumping pipe 6 through the water pump 5 and flows into the drainage main pipe 7 through the water pumping pipe 6, the drainage main pipe 7 is located on the edge of a pit on the foundation pit 15, and the drainage main pipe 7 is supported and fixed through a support 11 arranged below. The guard rail 12 is installed on the ground on the side of the support 11 close to the foundation pit 15 to prevent the drainage main 7 from falling into the foundation pit 15. One end of the water outlet pipe 8 is connected with the water drainage main pipe 7, and the other end of the water outlet pipe 8 is connected with the sedimentation tank 9.
S5, collecting the water in the main drainage pipe 7 to the water outlet pipe 8, flowing into the sedimentation tank 9 through the water outlet pipe 8 for sedimentation treatment, and using the water after sedimentation for concrete maintenance, on-site watering and dust fall, greening water and the like, thereby realizing the reutilization of water resources.
When the site operation is carried out, the drainage ditch 2 is arranged in the foundation pit 15 along the edge of the pit, the drainage ditch 2 is arranged outside the basic range of the foundation pit 15, the slope toe of the foundation pit 15 away from the edge of the drainage ditch 2 is not less than 0.3m, and the width of the bottom of the drainage ditch 2 is not less than 0.3 m. Lay grit anti-filtration layer 3 and apply collector pipe 4 secretly in escape canal 2, collector pipe 4 is formed by 150~200 mm's UPVC pipe preparation in, offers the drainage hole 16 that is the plum blossom shape and arranges on collector pipe 4, and the size in drainage hole 16 sets up to 15mm in, and the interval between the adjacent drainage hole 16 sets up to 50 mm. The longitudinal gradient of the drainage ditch 2 and the water collecting pipe 4 is preferably 0.1-0.2%, and the bottom surface of the water collecting pipe 4 is 0.3-0.5 m lower than the bottom or excavation surface of the foundation pit 15. The four end corners are respectively provided with a water collecting well 1, the water collecting well 1 is made of DN700 double-wall corrugated pipes, the well depth is 1-1.5 m, and the bottom of the well is provided with a gravel filter layer 14 with the thickness of 200 mm. The water collecting wells 1 are arranged at four corners of the foundation pit 15, one water collecting well is arranged at intervals of 30-40 m along the side of the foundation pit 15, and the bottoms of the water collecting wells 1 are 0.5-1 m lower than the water collecting pipes 4 connected with each other or are deeper than the water inlet valves of the water suction pumps 5. A water pump 5 is installed in the water collecting well 1, and the type selection of the water pump 5 is selected according to the water displacement and the depth of the foundation pit 15. And mounting and fixing the drainage main pipe 7 by adopting an angle steel welding bracket 11. The water outlet pipe 8 is provided with a 0.5% slope sedimentation tank 9, and the sedimentation tank 9 can adopt a finished product sedimentation tank 9.
And after the construction is finished, starting the water pump 5 and draining the foundation pit 15. The water in the foundation pit 15 flows to the drainage ditch 2, flows into the water collecting pipe 4 through the water filtering holes 16 on the water collecting pipe 4, and the water in the water collecting pipe 4 flows into the water collecting wells 1 on two sides. The water pump 5 pumps water in the water collecting well 1 to the water pumping pipe 6, the water flows into the drainage main pipe 7 through the water pumping pipe 6, the water in the drainage main pipe 7 is gathered together and flows into the sedimentation tank 9 through the water outlet pipe 8 for sedimentation treatment, and the treated water is recycled. The system is suitable for the diving or surface water areas with the water-bearing layer cohesive soil or sandy soil stratum and the precipitation depth less than 1m in industrial and civil building engineering.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (6)

1. A foundation pit shallow layer drainage method is characterized by comprising the following steps:
s1, arranging water collecting wells at the end corners of the bottom of the foundation pit and along the edge of the inner side of the foundation pit;
s2, arranging drainage ditches between the adjacent water collecting wells;
s3, arranging a reverse filter layer in the drainage ditch to hide and coat a water collecting pipe, wherein the water collecting pipe is provided with water filtering holes, so that water in the foundation pit flows into the water collecting pipe through the water filtering holes and is introduced into the water collecting wells at two sides through the water collecting pipe;
s4, pumping water in the water collecting well into a water pumping pipe through a water pump, and introducing the water into a drainage main pipe through the water pumping pipe;
and S5, collecting the water in the drainage main pipe into a water outlet pipe, and discharging the water into a sedimentation tank for sedimentation through the water outlet pipe.
2. The foundation pit shallow drainage method according to claim 1, wherein S1 specifically comprises: and water collecting wells are respectively arranged at four end corners of the bottom of the foundation pit, and one water collecting well is arranged along the inner side edge of the foundation pit every 30-40 meters.
3. The foundation pit shallow drainage method of claim 1, wherein the distance between the edge of the drainage ditch and the toe of the foundation pit is greater than or equal to 0.3m, and the width of the drainage ditch is greater than or equal to 0.3 m.
4. The foundation pit shallow drainage method according to claim 1, wherein the drainage holes are arranged in a quincunx pattern.
5. The method for draining water from a shallow part of a foundation pit according to claim 1, wherein the water collecting pipe is wound with a back-filtering cloth for blocking sand from entering the water collecting pipe.
6. The method of claim 1, wherein the bottom surface of the water collecting pipe is 0.3 to 0.5m lower than the bottom of the foundation pit, and the end of the water collecting pipe is 0.5 to 1m higher than the adjacent water collecting well.
CN202210595663.7A 2022-05-30 2022-05-30 Foundation pit shallow layer drainage method Pending CN114737589A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210595663.7A CN114737589A (en) 2022-05-30 2022-05-30 Foundation pit shallow layer drainage method

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Application Number Priority Date Filing Date Title
CN202210595663.7A CN114737589A (en) 2022-05-30 2022-05-30 Foundation pit shallow layer drainage method

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CN114737589A true CN114737589A (en) 2022-07-12

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115288173A (en) * 2022-09-13 2022-11-04 中国五冶集团有限公司 Foundation pit drainage system and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115288173A (en) * 2022-09-13 2022-11-04 中国五冶集团有限公司 Foundation pit drainage system and method

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