CN112095644A - Deep foundation pit water intercepting and draining device and construction method thereof - Google Patents
Deep foundation pit water intercepting and draining device and construction method thereof Download PDFInfo
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- CN112095644A CN112095644A CN202011086499.4A CN202011086499A CN112095644A CN 112095644 A CN112095644 A CN 112095644A CN 202011086499 A CN202011086499 A CN 202011086499A CN 112095644 A CN112095644 A CN 112095644A
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- pit
- foundation pit
- deep foundation
- drainage
- water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 238000010276 construction Methods 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 239000011449 brick Substances 0.000 claims abstract description 9
- 238000001556 precipitation Methods 0.000 claims description 19
- 239000004567 concrete Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000004062 sedimentation Methods 0.000 claims description 6
- 208000034189 Sclerosis Diseases 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000011378 shotcrete Substances 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000002689 soil Substances 0.000 abstract 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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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
- E03F5/101—Dedicated additional structures, interposed or parallel to the sewer system
Abstract
The invention discloses a deep foundation pit water intercepting and draining device and a construction method thereof, wherein the device comprises fender posts arranged along the periphery of a deep foundation pit, and an out-pit dewatering well and an in-pit dewatering well which are respectively arranged outside the deep foundation pit and inside the deep foundation pit, a supporting structure connected with the fender posts is arranged at the opening part of the deep foundation pit, crown beams are poured at the tops of the fender posts, retaining walls are built on the crown beams, drainage ditches are buried in a slope top backfill soil side outside the retaining walls, meanwhile, water collecting wells are buried at certain intervals, and the drainage ditches are connected with the water collecting wells. The invention breaks through the traditional mode of adopting brick drainage ditches and water collecting wells, adopts half-corrugated pipe drainage ditches and steel water collecting wells to replace, overcomes the defects of material waste and long construction period of the traditional mode, and the water interception and drainage device is made of shaped recyclable materials, and is convenient, rapid and efficient to install; the requirements of water interception and drainage of the slope top of the foundation pit can be met, sustainable use is facilitated, and the purposes of energy conservation and environmental protection are achieved.
Description
Technical Field
The invention relates to a deep foundation pit water intercepting and draining device and a construction method thereof, belonging to the technical field of industrial and civil building engineering.
Background
In the deep foundation pit constructional engineering work process, the internal and external precipitation of foundation pit and ground water interception facility have certainly existed for the internal and external water level of deep foundation pit keeps at certain elevation, at the drainage in-process that falls, foundation pit sloping top must set up and cut drainage system, and traditional way adopts brick drainage ditch and water collection well as cutting drainage system, and this kind of mode construction speed is slow, with high costs.
Disclosure of Invention
The invention aims to provide a deep foundation pit water intercepting and draining device and a construction method thereof, wherein the device is convenient, rapid and efficient to install, meets the construction requirements of water drainage and ground interception, and can ensure the safety control of deep foundation pit construction.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a deep basal pit cuts drainage device, includes the fender pile that arranges along the deep basal pit periphery and sets up respectively at the outside pit precipitation well and the pit in the pit inside of deep basal pit outside and deep basal pit, is provided with the bearing structure who is connected with the fender pile in the oral area of deep basal pit, has pour the hat roof beam at the top of fender pile, has built by laying bricks or stones retaining wall on the hat roof beam, has buried the escape canal in the slope top backfill earthwork in the retaining wall outside, has buried the sump pit according to the certain interval simultaneously, escape canal and sump pit connection, pour the slope top sclerosis layer in the slope top backfill earthwork, and slope top sclerosis layer has a certain slope and inclines to the escape canal direction, all is provided with the immersible pump in pit outer precipitation well and the pit in the precipitation well, and the immersible pump in pit outer precipitation well and the pit in the pit all is connected with the sump pit through the drain pipe.
Further, the retaining wall is higher than the slope top backfill earthwork outside the deep foundation pit.
Further, the elevation of escape canal and the oral area parallel and level of sump pit.
Meanwhile, the invention also provides a deep foundation pit water intercepting and draining construction method based on the deep foundation pit water intercepting and draining device, which comprises the following steps:
firstly, enclosing piles are arranged along the periphery of a deep foundation pit, an out-pit dewatering well and an in-pit dewatering well are respectively arranged outside the deep foundation pit and inside the deep foundation pit, then a top beam is poured on the top of the enclosing piles, a retaining wall is built on the top beam, and foundation pit slope top earthwork backfilling is carried out on the outer side of the retaining wall; burying drainage ditches on the slope top backfill earthwork outside the retaining wall, burying water collecting wells at certain intervals, connecting the drainage ditches with the water collecting wells, and then pouring a slope top hardened layer on the slope top backfill earthwork to ensure that the slope top hardened layer has a certain gradient and inclines towards the drainage ditches, so as to facilitate water interception;
before earth excavation, putting submersible pumps into the precipitation well outside the pit and the precipitation well inside the pit, connecting the submersible pumps with the water collecting well through drain pipes, pumping water in the precipitation well outside the pit and the precipitation well inside the pit into the water collecting well, enabling water overflowing from the water collecting well to flow into a third-stage sedimentation tank through drainage ditches, purifying the water by the third-stage sedimentation tank, and discharging the purified water into a municipal pipe network;
and step three, after the rainfall reaches the design requirement, arranging a supporting structure connected with the guard post at the opening part of the deep foundation pit, continuously excavating earthwork in the deep foundation pit after the supporting structure reaches the design strength until the underground structure is constructed, and stopping the rainfall after the earthwork of the deep foundation pit is backfilled.
In the method, the drainage ditch is a half-bellows drainage ditch which is manufactured by cutting a bellows with the diameter of 300-350 mm from the middle; the water collecting well is a steel water collecting well formed by welding stainless steel plates, semicircular notches are symmetrically formed in two sides of the opening of the water collecting well, and the drainage ditch is connected to the semicircular notches.
In the method, the fender pile is a row pile, a waterproof curtain, an underground continuous wall, an SMW construction pile or a TRD and I-steel, the supporting structure is a concrete support, a steel support or an anchor cable, and the retaining wall is a brick retaining wall, a concrete retaining wall or a spray anchor.
Due to the adoption of the technical scheme, the invention has the following advantages: the invention breaks through the traditional mode of adopting brick drainage ditches and water collecting wells, adopts half-corrugated pipe drainage ditches and steel water collecting wells to replace, overcomes the defects of material waste and long construction period of the traditional mode, and the water interception and drainage device is made of shaped recyclable materials, and is convenient, rapid and efficient to install; the requirements of water interception and drainage of the slope top of the foundation pit can be met, sustainable use is facilitated, and the purposes of energy conservation and environmental protection are achieved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of a connection structure of a drainage ditch and a collector well.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention comprises the following steps: referring to fig. 1, a deep foundation pit intercepting and draining device and a construction method thereof includes fender posts 1 arranged along the periphery of a deep foundation pit, and an out-pit dewatering well 4 and an in-pit dewatering well 5 respectively disposed outside and inside the deep foundation pit, a supporting structure 2 connected with the fender post 1 is arranged at the opening part of the deep foundation pit, a crown beam 3 is poured at the top part of the fender post 1, a retaining wall 6 is built on the crown beam 3, a drainage ditch 8 is buried in the slope top backfill earthwork outside the retaining wall 6, meanwhile, water collecting wells 7 are buried at certain intervals, the drainage ditch 8 is connected with the water collecting wells 7, a slope top hardened layer 9 is poured on the slope top backfill earthwork, the slope top hardened layer 9 has a certain gradient and inclines towards the drainage ditch 8, submersible pumps 10 are arranged in the precipitation well 4 outside the pit and the precipitation well 5 in the pit, and the submersible pumps 10 in the precipitation well 4 outside the pit and the precipitation well 5 in the pit are connected with the water collecting well 7 through drain pipes 11. And the retaining wall 6 is higher than the slope top backfill earthwork at the outer side of the deep foundation pit. The elevation of the drainage ditch 8 is flush with the opening of the water collecting well 7.
When the deep foundation pit water intercepting and draining device is used for deep foundation pit water intercepting and draining construction, the following steps can be adopted:
firstly, arranging fender posts 1 along the periphery of a deep foundation pit, respectively digging an out-pit dewatering well 4 and an in-pit dewatering well 5 outside the deep foundation pit and inside the deep foundation pit, then pouring a crown beam 3 on the top of the fender posts 1, building a retaining wall 6 on the crown beam 3, and backfilling the top earthwork of the foundation pit at the outer side of the retaining wall 6; burying drainage ditches 8 in the slope top backfilling earthwork outside the retaining wall 6, burying water collecting wells 7 at certain intervals, connecting the drainage ditches 8 with the water collecting wells 7, and pouring a slope top hardened layer 9 on the slope top backfilling earthwork to ensure that the slope top hardened layer 9 has a certain gradient and inclines towards the drainage ditches 8 so as to facilitate water interception;
before earth excavation, putting a submersible pump 10 into the out-of-pit dewatering well 4 and the in-pit dewatering well 5, connecting the submersible pump 10 with the water collecting well 7 through a drain pipe 11, pumping water in the out-of-pit dewatering well 4 and the in-pit dewatering well 5 into the water collecting well 7, and then enabling water overflowing from the water collecting well 7 to flow into a third-stage sedimentation tank through a drainage ditch 8 and be discharged into a municipal pipe network after being purified by the third-stage sedimentation tank;
and step three, after the rainfall reaches the design requirement, arranging a supporting structure 2 connected with the fender post 1 at the opening part of the deep foundation pit, continuously excavating earthwork in the deep foundation pit after the supporting structure 2 reaches the design strength until the underground structure is constructed, and stopping the rainfall after the earthwork of the deep foundation pit is backfilled.
Referring to fig. 2, in the embodiment, the drainage ditch 8 is a half-bellows drainage ditch manufactured by cutting a corrugated pipe with a diameter of 300-350 mm from the middle; the water collecting well 7 is a steel water collecting well formed by welding stainless steel plates, semicircular notches are symmetrically formed in two sides of an opening of the water collecting well 7, and the drainage ditch 8 is connected to the semicircular notches.
In this embodiment, fender pile 1 is campshed + waterproof curtain, underground continuous wall, SMW worker method stake or TRD + I-steel, bearing structure 2 is concrete support, steel shotcrete or anchor rope, retaining wall 6 is brick retaining wall, concrete retaining wall or spray anchor.
In conclusion, the invention breaks through the traditional mode of adopting brick drainage ditches and water collecting wells, adopts half-corrugated pipe drainage ditches and steel water collecting wells to replace, overcomes the defects of material waste and long construction period of the traditional mode, and the water interception and drainage device is made of shaped recyclable materials, and is convenient, rapid and efficient to install; the requirements of water interception and drainage of the slope top of the foundation pit can be met, sustainable use is facilitated, and the purposes of energy conservation and environmental protection are achieved.
Claims (6)
1. The utility model provides a deep basal pit cuts drainage device, includes fender pile (1) and the interior precipitation well (5) of pit (4) and pit that set up respectively outside the deep basal pit and inside the deep basal pit along the peripheral fender post (1) of arranging of deep basal pit, its characterized in that: be provided with bearing structure (2) of being connected with fender pile (1) at the oral area of deep basal pit, pour crown beam (3) at the top of fender pile (1), build by laying bricks or stones retaining wall (6) on crown beam (3), bury drainage ditch (8) underground on the slope top backfill earthwork in the retaining wall (6) outside, bury sump pit (7) according to a determining deviation simultaneously, drainage ditch (8) and sump pit (7) be connected, pour slope top sclerosis layer (9) on the slope top backfill earthwork, and slope top sclerosis layer (9) have certain slope and to the slope of drainage ditch (8) direction, all be provided with immersible pump (10) in precipitation well (5) outside the pit and in the pit, and immersible pump (10) in precipitation well (4) outside the pit and the pit in precipitation well (5) all are connected with sump pit (7) through drain pipe (11).
2. The deep foundation pit intercepting drainage device of claim 1, wherein: and the retaining wall (6) is higher than the slope top backfill earthwork at the outer side of the deep foundation pit.
3. The deep foundation pit intercepting drainage device of claim 1, wherein: the elevation of the drainage ditch (8) is flush with the opening of the water collecting well (7).
4. A deep foundation pit water intercepting and draining construction method based on the deep foundation pit water intercepting and draining device of any one of claims 1-3 is characterized by comprising the following steps:
firstly, retaining piles (1) are arranged along the periphery of a deep foundation pit, an out-pit dewatering well (4) and an in-pit dewatering well (5) are respectively arranged outside the deep foundation pit and inside the deep foundation pit, then a top beam (3) is poured on the top of each retaining pile (1), a retaining wall (6) is built on each top beam (3), and foundation pit slope top earthwork backfilling is carried out on the outer side of each retaining wall (6); burying drainage ditches (8) in the slope top backfill earthwork on the outer side of the retaining wall (6), burying water collecting wells (7) at certain intervals, connecting the drainage ditches (8) with the water collecting wells (7), and pouring a slope top hardened layer (9) in the slope top backfill earthwork to ensure that the slope top hardened layer (9) has a certain gradient and inclines towards the drainage ditches (8) so as to facilitate water interception;
before earth excavation, putting a submersible pump (10) into the out-of-pit dewatering well (4) and the in-pit dewatering well (5), connecting the submersible pump (10) with the water collecting well (7) through a drainage pipe (11), pumping water in the out-of-pit dewatering well (4) and the in-pit dewatering well (5) into the water collecting well (7), enabling water overflowing from the water collecting well (7) to flow into a three-stage sedimentation tank through a drainage ditch (8), and discharging the water into a municipal pipe network after being purified by the three-stage sedimentation tank;
and step three, after the precipitation reaches the design requirement, arranging a supporting structure (2) connected with the fender post (1) at the opening part of the deep foundation pit, continuing excavating earthwork in the deep foundation pit after the supporting structure (2) reaches the design strength until the underground structure is constructed, and stopping the precipitation after backfilling the earthwork of the deep foundation pit.
5. The deep foundation pit water interception and drainage construction method according to claim 4, characterized in that: the drainage ditch (8) is a half-corrugated-pipe drainage ditch which is manufactured by cutting a corrugated pipe with the diameter of 300-350 mm from the middle; the water collecting well (7) is a steel water collecting well formed by welding stainless steel plates, semicircular notches are symmetrically formed in two sides of the opening of the water collecting well (7), and the drainage ditch (8) is connected to the semicircular notches.
6. The deep foundation pit water interception and drainage construction method according to claim 4, characterized in that: fender pile (1) is row pile + stagnant water curtain, underground continuous wall, SMW worker method stake or TRD + I-steel, bearing structure (2) are concrete support, steel shotcrete or anchor rope, retaining wall (6) are brick retaining wall, concrete retaining wall or spray anchor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011086499.4A CN112095644A (en) | 2020-10-12 | 2020-10-12 | Deep foundation pit water intercepting and draining device and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011086499.4A CN112095644A (en) | 2020-10-12 | 2020-10-12 | Deep foundation pit water intercepting and draining device and construction method thereof |
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| CN112095644A true CN112095644A (en) | 2020-12-18 |
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| CN202011086499.4A Pending CN112095644A (en) | 2020-10-12 | 2020-10-12 | Deep foundation pit water intercepting and draining device and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115217134A (en) * | 2022-08-31 | 2022-10-21 | 中国二十二冶集团有限公司 | Water reducing method for ground surface pore water in pebble bed and weathered rock region in narrow region |
| CN115341560A (en) * | 2022-10-19 | 2022-11-15 | 中国建筑第六工程局有限公司 | Construction method of temporary drainage system in deep foundation pit engineering construction site |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4020902A (en) * | 1975-07-03 | 1977-05-03 | R. L. Gould | Well point system |
| CN205804380U (en) * | 2016-06-12 | 2016-12-14 | 中国十七冶集团有限公司 | A kind of Deep Foundation Pit Well-Point Dewatering and the wastewater recycling system of pile tube subsoil water |
| CN108677981A (en) * | 2018-04-18 | 2018-10-19 | 中国十七冶集团有限公司 | A kind of discharge structure and its construction method of ultra-deep piping lane foundation pit |
| CN212896422U (en) * | 2020-10-12 | 2021-04-06 | 中国建筑第四工程局有限公司 | Deep foundation pit water intercepting and draining device |
-
2020
- 2020-10-12 CN CN202011086499.4A patent/CN112095644A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4020902A (en) * | 1975-07-03 | 1977-05-03 | R. L. Gould | Well point system |
| CN205804380U (en) * | 2016-06-12 | 2016-12-14 | 中国十七冶集团有限公司 | A kind of Deep Foundation Pit Well-Point Dewatering and the wastewater recycling system of pile tube subsoil water |
| CN108677981A (en) * | 2018-04-18 | 2018-10-19 | 中国十七冶集团有限公司 | A kind of discharge structure and its construction method of ultra-deep piping lane foundation pit |
| CN212896422U (en) * | 2020-10-12 | 2021-04-06 | 中国建筑第四工程局有限公司 | Deep foundation pit water intercepting and draining device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115217134A (en) * | 2022-08-31 | 2022-10-21 | 中国二十二冶集团有限公司 | Water reducing method for ground surface pore water in pebble bed and weathered rock region in narrow region |
| CN115341560A (en) * | 2022-10-19 | 2022-11-15 | 中国建筑第六工程局有限公司 | Construction method of temporary drainage system in deep foundation pit engineering construction site |
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