CN105780791A - Well plugging construction method for deep dewatering wellhead inside underground garage foundation pit - Google Patents
Well plugging construction method for deep dewatering wellhead inside underground garage foundation pit Download PDFInfo
- Publication number
- CN105780791A CN105780791A CN201610144415.5A CN201610144415A CN105780791A CN 105780791 A CN105780791 A CN 105780791A CN 201610144415 A CN201610144415 A CN 201610144415A CN 105780791 A CN105780791 A CN 105780791A
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- well
- waterproof
- steel cylinder
- seal ring
- foundation pit
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- 238000010276 construction Methods 0.000 title claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 43
- 239000010959 steel Substances 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000004575 stone Substances 0.000 claims abstract description 9
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 4
- 238000001556 precipitation Methods 0.000 claims description 23
- 238000002955 isolation Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 2
- 238000012549 training Methods 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract 1
- 238000003466 welding Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 238000004078 waterproofing Methods 0.000 description 6
- 238000012407 engineering method Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention relates to a well plugging construction method for a deep dewatering wellhead inside an underground garage foundation pit. The method includes the following steps that (1) a dewatering well is arranged in the middle part of the foundation pit; (2) a steel cylinder type waterstop ring is arranged before pouring of a cushion layer; (3) building stones are stuffed in until the stones submerge a pump by 40-50 cm, and water pumping continues; (4) waterproof concrete is poured till an inner waterstop ring on the steel cylinder type waterstop ring is 2 cm lower than an upper opening; (5) full-length welding is carried out around a steel sheet with the same inner diameter as the steel cylinder type waterstop ring, and a mortar levelling layer of 20 mm is obtained; (6) an additional layer is subject to waterproof closing, cushion layer concrete is poured, and a full-length waterproof layer is closed; and (7) foundation raft rebar is bound. The appropriate dewatering well is arranged in the middle part of the foundation pit so that the underground water level can be lowered efficiently, the construction progress is quickened, the construction period is shortened, and construction cost is greatly reduced. The waterproof and plugging construction method for the dewatering well inside the foundation pit is simple and convenient, professional training of operators is not required, and the work can be completed by common electric welders and waterproof workers.
Description
Technical field
The present invention relates to technical field of building construction.
Background technology
Along with the fast development of urban construction, skyscraper is increasing, and deep foundation pit construction also can be frequently encountered by, and the closure of deep foundation pit precipitation well is the key link of whole foundation construction, and it directly influences this position waterproofing quality.In the engineering construction of In Great Basement and underground garage, the foundation ditch relatively big for width, underground water content is big, foundation ditch width is bigger, while foundation ditch surrounding lays deep well points, dewatering well also need to be set in the middle of soleplate, but this closure terminating rear well head to precipitation brings certain difficulty and trouble.
Summary of the invention
The technical problem to be solved in the present invention is to provide deep-well precipitation well head well-sealing device and construction method in a kind of better underground garage foundation ditch of waterproof effect.
nullFor solving above-mentioned technical problem，Deep-well precipitation well head well-sealing device in the underground garage foundation ditch of the present invention，Including the dewatering well being arranged on foundation ditch middle part，Described dewatering well includes outermost supporting course，Gravel layer is inserted between supporting course and well casing，Immersible pump is set in well casing，Set up defences water layer in precipitation shaft mouth side upper berth，Build Base isolation system concrete again，Precipitation well head arranges steel cylinder formula seal ring，Described steel cylinder formula seal ring includes stack shell and is welded on the interior waterstop of stack shell inner side and outer side and outer waterstop，Described Base isolation system arranges doughnut-shaped steel plate waterstop，Stone is inserted in dewatering well the latter half，On stone casting concrete to distance steel cartridge type seal ring along 2cm position，Described outer waterstop is higher than interior waterstop at least 100mm，The internal diameter of described doughnut-shaped steel plate waterstop is identical with the outer waterstop maximum outside diameter on described steel cylinder formula seal ring，Described concrete is arranged and is welded on steel cylinder formula seal ring the steel plate on edge，The diameter of steel plate is identical with steel cylinder formula seal ring internal diameter，Steel plate is laid the thick screed of 2cm，Screed is laid additional waterproofing layer，Additional waterproofing layer is laid blinding concrete，Blinding concrete is laid elongated waterproof layer.
In the underground garage foundation ditch of the present invention, the construction method of deep-well precipitation well head shut-in well, comprises the following steps:
1), dewatering well is laid in foundation ditch middle part；
2), bed course lays steel cylinder formula seal ring before building；
3), building stones are inserted do not have pump 40 to 50cm to continue to draw water；
4), waterproof concrete build the interior seal ring to steel cylinder formula seal ring, lower than 2cm suitable for reading；
5) and steel cylinder formula seal ring with internal diameter steel plate border full weld, on steel plate lay 20mm mortar levelling layer；
6), laying extra play waterproof Guan Bi on screed, cushion layer concrete is built, and elongated waterproof layer closes；
7), Base isolation system reinforcing bar binding.
This engineering method has the following advantages compared with common dewatering construction technology:
1. the suitable dewatering well of foundation ditch intermediate arrangement can lowering of watertable, accelerating construction progress efficiently, shorten the construction period, be substantially reduced construction costs.
2. the waterproof of precipitation well in foundation pit is easy with plugging construction method, and operator do not need to carry out professional training, and common electric welder's work and waterproofer can complete.
3. speed of application is fast, does not affect the construction of other operations, nor affects on construction speed.
4. the material adopted is in construction common used material, and the cost of material is low, and its cost is quite cheap.
5. good water-proof effect, have employed multi layer waterproof construction measure, can guarantee that the waterproof effect of concrete floor,
There is bigger economic benefit and social benefit.
1. quality aspect.This engineering method plugging effect is good, simple to operate, the easily controllable construction quality of work progress, does not have infiltration phenomenon, and plugging effect is more secure.
2. secure context.This engineering method is only with small machine, it is not necessary to big security capital.
3. technical elements.This engineering method is owing to being three road waterproof guard from inside to outside, simple to operate, does not have infiltration phenomenon, and plugging effect is more secure, and does not affect the construction of other operations.
4. economic aspect.The machinery that this engineering method adopts is simple, and easy construction, construction cost is relatively small.It is exactly that immersible pump has been embedded in the dewatering well to seal that main facility put into, but bring time do not affect the construction of other operations, construction speed accelerates, and substantially reduces the persistent period of precipitation in foundation ditch, achieves considerable economic benefit.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the schematic diagram of the first step of deep-well precipitation well head well-sealing device construction method in underground garage foundation ditch of the present invention.
Fig. 2 is the schematic diagram of the second step of deep-well precipitation well head well-sealing device construction method in underground garage foundation ditch of the present invention.
Fig. 3 is the schematic diagram of the 3rd step of deep-well precipitation well head well-sealing device construction method in underground garage foundation ditch of the present invention.
Fig. 4 is the schematic diagram of the 4th step of deep-well precipitation well head well-sealing device construction method in underground garage foundation ditch of the present invention.
Fig. 5 is the schematic diagram of the 5th step of deep-well precipitation well head well-sealing device construction method in underground garage foundation ditch of the present invention.
Fig. 6 is the schematic diagram of the 6th step of deep-well precipitation well head well-sealing device construction method in underground garage foundation ditch of the present invention.
Fig. 7 is the schematic diagram of the 7th step of deep-well precipitation well head well-sealing device construction method in underground garage foundation ditch of the present invention.
Fig. 8 is the schematic diagram of the 8th step of deep-well precipitation well head well-sealing device construction method in underground garage foundation ditch of the present invention.
Fig. 9 is the schematic diagram of the 9th step of deep-well precipitation well head well-sealing device construction method in underground garage foundation ditch of the present invention.
Detailed description of the invention
nullDeep-well precipitation well head well-sealing device in the underground garage foundation ditch of the present invention，Including the dewatering well being arranged on foundation ditch middle part，Dewatering well includes outermost supporting course 1，Gravel layer 2 is set inside supporting course 1，Equipped with filter tube 3 inside gravel layer 2，Immersible pump 4 is set in filter tube 3，Set up defences water layer 5 and Base isolation system 6 in precipitation shaft mouth side upper berth，Precipitation well head arranges steel cylinder formula seal ring 7，Steel cylinder formula seal ring 7 includes stack shell and is welded on the interior waterstop 7b and outer waterstop 7c of stack shell inner side and outer side，Base isolation system 6 arranges doughnut-shaped steel plate waterstop 8，Stone 9 is inserted in dewatering well the latter half，Along 2cm position on casting concrete 10 to distance steel cartridge type seal ring 7 on stone 9，Outer waterstop 7c is higher than interior waterstop at least 100mm，The internal diameter of doughnut-shaped steel plate waterstop 8 is identical with the outer waterstop 7c maximum outside diameter on steel cylinder formula seal ring 7，Concrete 10 is arranged and is welded on steel cylinder formula seal ring 7 steel plate 11 on edge，The diameter of steel plate 11 is identical with steel cylinder formula seal ring 7 internal diameter，Steel plate 11 is laid the thick screed 12 of 2cm，Screed 12 is laid additional waterproofing layer 13，Additional waterproofing layer 13 is laid blinding concrete 14，Blinding concrete 14 is laid elongated waterproof layer 15.
Concrete construction procedure is:
1, cartridge type steel plate for sealing water makes.
(1), adopt the hot rolled seamless steel tube of Φ 325 × 10 to make steel thimble, steel thimble height 500mm, dispose height in the half height thickening bed course.
(2), in cartridge type seal ring, full weld waterstop is distinguished in outside, and both discrepancy in elevation are more than 100mm.
(3), water-stopping steel cover sheet thickness 10mm, its diameter 3mm less of cartridge type seal ring internal diameter.
(4), Base isolation system annular steel plate water stopper, wall thickness 3mm, width 300mm, its internal diameter is identical with cartridge type seal ring maximum outside diameter place.
2, cushion layer concrete places steel cylinder formula seal ring before building, as shown in Figure 1.
3, Jiang Shui be evacuated to lowest water level insert stone pump imbed 40-50cm continue to draw water, as shown in Figure 2.
4, waterproof concrete is poured into first cartridge type seal ring, lower than 2cm suitable for reading, as shown in Figure 3.
5 and cartridge type seal ring with internal diameter steel deck-plate full weld, as shown in Figure 4.
6,20mm thickness mortar levelling layer, as shown in Figure 5.
7, additional waterproofing layer Guan Bi, as shown in Figure 6.
8, cushion layer concrete is built, as shown in Figure 7.
9, elongated waterproof layer Guan Bi, as shown in Figure 8.
10, after agent structure binds, in Base isolation system, dewatering well is stopped using.Base isolation system reinforcing bar binding puts in place, and cast improves a grade concrete, as shown in Figure 9.
11, concrete curing.
Before concrete reaches initial set, carry out secondary and roll, reduce Plastic Shrinkage of Concrete.Surface covered with plastic film, felt, carry out maintenance to this place's expansive concrete, and curing time is not less than 14 days.
The above; it is only presently preferred embodiments of the present invention; not in order to limit the present invention, every any trickle amendment, equivalent replacement and improvement above example made according to the technical spirit of the present invention, should be included within the protection domain of technical solution of the present invention.
Claims (1)
1. deep-well precipitation well head shut-in well construction method in a underground garage foundation ditch, it is characterised in that: comprise the following steps:
1), dewatering well is laid in foundation ditch middle part；
2), bed course lays steel cylinder formula seal ring before building；
3), building stones are inserted do not have pump 40 to 50cm to continue to draw water；
4), waterproof concrete be poured into the interior seal ring on steel cylinder formula seal ring, lower than 2cm suitable for reading；
5) and steel cylinder type seal ring with internal diameter steel plate border full weld, 20mm mortar levelling layer；
6), extra play waterproof Guan Bi, cushion layer concrete is built, elongated waterproof layer close；
7), Base isolation system reinforcing bar binding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610144415.5A CN105780791B (en) | 2014-08-28 | 2014-08-28 | Deep-well precipitation well head shut-in well construction method in underground garage foundation pit |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410428970.1A CN104196045B (en) | 2014-08-28 | 2014-08-28 | Deep-well precipitation well head well-sealing device and method in underground garage foundation ditch |
| CN201610144415.5A CN105780791B (en) | 2014-08-28 | 2014-08-28 | Deep-well precipitation well head shut-in well construction method in underground garage foundation pit |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410428970.1A Division CN104196045B (en) | 2014-08-28 | 2014-08-28 | Deep-well precipitation well head well-sealing device and method in underground garage foundation ditch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105780791A true CN105780791A (en) | 2016-07-20 |
| CN105780791B CN105780791B (en) | 2019-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610144415.5A Active CN105780791B (en) | 2014-08-28 | 2014-08-28 | Deep-well precipitation well head shut-in well construction method in underground garage foundation pit |
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| Country | Link |
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| CN (1) | CN105780791B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106400822A (en) * | 2016-09-23 | 2017-02-15 | 山东金城建设有限公司 | Construction method for shutting deep foundation pit precipitation well |
| CN111350191A (en) * | 2020-03-04 | 2020-06-30 | 中交第三航务工程勘察设计院有限公司 | Bucket type foundation structure pumping system and construction process thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007239286A (en) * | 2006-03-08 | 2007-09-20 | Kajima Corp | Construction method for lowering underground water level |
| CN101148884A (en) * | 2007-10-30 | 2008-03-26 | 山东天齐置业集团股份有限公司 | Waterproof and plugging construction method for precipitation well in foundation pit |
| CN202787334U (en) * | 2012-07-16 | 2013-03-13 | 杭州萧宏建设集团有限公司 | Sealing structure of deep well casing used during tunnel construction |
| CN103161171A (en) * | 2011-12-13 | 2013-06-19 | 中国二十冶集团有限公司 | Method for sealing pressure-reduced dewatering well with water pump |
| CN203583504U (en) * | 2013-10-23 | 2014-05-07 | 深圳市建业建筑工程有限公司 | Water pumping structure for concrete layer pouring |
-
2014
- 2014-08-28 CN CN201610144415.5A patent/CN105780791B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007239286A (en) * | 2006-03-08 | 2007-09-20 | Kajima Corp | Construction method for lowering underground water level |
| CN101148884A (en) * | 2007-10-30 | 2008-03-26 | 山东天齐置业集团股份有限公司 | Waterproof and plugging construction method for precipitation well in foundation pit |
| CN103161171A (en) * | 2011-12-13 | 2013-06-19 | 中国二十冶集团有限公司 | Method for sealing pressure-reduced dewatering well with water pump |
| CN202787334U (en) * | 2012-07-16 | 2013-03-13 | 杭州萧宏建设集团有限公司 | Sealing structure of deep well casing used during tunnel construction |
| CN203583504U (en) * | 2013-10-23 | 2014-05-07 | 深圳市建业建筑工程有限公司 | Water pumping structure for concrete layer pouring |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106400822A (en) * | 2016-09-23 | 2017-02-15 | 山东金城建设有限公司 | Construction method for shutting deep foundation pit precipitation well |
| CN106400822B (en) * | 2016-09-23 | 2018-06-26 | 山东金城建设有限公司 | Deep foundation pit precipitation well shut-in well construction method |
| CN111350191A (en) * | 2020-03-04 | 2020-06-30 | 中交第三航务工程勘察设计院有限公司 | Bucket type foundation structure pumping system and construction process thereof |
| CN111350191B (en) * | 2020-03-04 | 2021-08-31 | 中交第三航务工程勘察设计院有限公司 | Bucket type foundation structure pumping system and construction process thereof |
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| Publication number | Publication date |
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| CN105780791B (en) | 2019-01-29 |
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Effective date of registration: 20181204 Address after: 310000 Building 2, 2988 Moganshan Road, Liangzhu street, Yuhang District, Hangzhou, Zhejiang 2-3 Applicant after: Tian Shang Design Group Limited Address before: 266071 Room 19F, Block B, Jindu Garden, 37 Donghai West Road, Southern District, Qingdao City, Shandong Province Applicant before: Guo Weixin |
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