CN111305245A - Confined water dewatering well sealing device and construction method - Google Patents
Confined water dewatering well sealing device and construction method Download PDFInfo
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- CN111305245A CN111305245A CN201911234054.3A CN201911234054A CN111305245A CN 111305245 A CN111305245 A CN 111305245A CN 201911234054 A CN201911234054 A CN 201911234054A CN 111305245 A CN111305245 A CN 111305245A
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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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- Hydrology & Water Resources (AREA)
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Abstract
The invention relates to a well sealing device of a confined water dewatering well and a construction method, wherein the device comprises a steel pipe well basin, a water stop ring welded on the wall of the steel pipe well basin, an air bag positioned at the lower part of the water stop ring in the well, a valve which is inflated through an air inlet pipe and clings to the well wall to fully seal the well basin, and a valve which can lock the air in the air bag; the upper part of the air bag is poured with concrete which does not cover the water stop ring, and the surface of the concrete is coated with water stop paint. The confined water precipitation well that realizes through this scheme seals the well, adopts the gasbag shutoff, can shorten the well sealing cycle, and reduce cost reduces the process, overcomes the not enough of current confined water precipitation well shutoff technique.
Description
Technical Field
The invention belongs to the technical field of well plugging of dewatering wells in constructional engineering, and relates to a well plugging device for a dewatering well with confined water and a construction method.
Background
At present, large-scale buildings are increasingly common, and the application of deep foundation pits is common. The plugging of the confined water precipitation well in the deep foundation pit is also very critical, and has direct influence on the waterproofing of the engineering and the smooth proceeding of the subsequent construction procedures. At present, a common well sealing technology is that when foundation pit excavation is completed and bottom plate construction is carried out, a great amount of water is drained from a dewatering well, then, by utilizing the clearance time of water level rising, mixed dry materials such as cement, sand, broken stone and the like are filled into a confined water dewatering well, tamping is carried out while filling, and finally, a steel well cover is placed and welded with a well pipe.
Disclosure of Invention
In order to overcome the defects of the existing confined water precipitation well plugging technology, the invention provides a confined water precipitation well plugging device. This confined water precipitation well shut-in adopts the gasbag shutoff, can shorten shut-in period, reduce cost reduces the process, and the scheme specifically is:
the utility model provides a confined water precipitation well shut-in device which characterized in that includes:
the device comprises a steel pipe well pool, a water stop ring welded on the wall of the steel pipe well pool, an air bag positioned at the lower part of the water stop ring in the well, a valve which can lock the gas in the air bag, and a valve which is inflated by an air inlet pipe and clings to the wall of the well to fully block the well pool; the upper part of the air bag is poured with concrete which does not cover the water stop ring, and the surface of the concrete is coated with water stop paint.
Further, the inlet duct above the valve may be trimmed after the valve is closed.
Further, the concrete is impervious concrete.
Further, the water-stop paint is a crystalline micro-expansion water-stop paint.
Further, the well mouth of the well sealing is sealed by high-grade unexpanded concrete.
The invention also discloses a construction method of the confined water dewatering well sealing device, which comprises the following steps,
s1, lowering water in the steel pipe well pool to a stable water level;
s2: placing the air bag into the well, and inflating the air bag until two sides of the air bag abut against the inner side of the well wall;
s3: concrete is poured over the air bags.
Further, after the water level is stable, a water stop ring is welded on the well wall and is positioned above the air bag.
Further, step S2 includes closing the valve on the air inlet pipe of the airbag after the two sides of the airbag abut against the inner side of the well wall to sufficiently plug the well pool, and cutting off the air inlet pipe at the upper part of the valve.
Further, the concrete poured in the step S3 is impervious concrete, and the crystalline micro-expansive water-stop paint is coated on the surface of the impervious concrete.
Further, step S3 includes finally plugging the wellhead with high grade unexpanded concrete.
The invention has the beneficial effects that: simple process, high efficiency, convenience, economy and practicality.
Drawings
FIG. 1 is an elevational view of the present invention;
FIG. 2 is a cross-sectional view of section A-A in FIG. 1.
Description of reference numerals: 1, an air inlet pipe; 2-a valve; 3-air bag; 4-high grade micro-expansive concrete; 5-crystalline micro-expansion water-stop paint; 6-impervious concrete; 7-a water stop ring; 8-a steel pipe; 9-confined water.
Detailed Description
The present invention will be further described with reference to the following examples.
As shown in figure 1, the well sealing device for the confined water dewatering well comprises a steel pipe 8 well basin, a water stop ring 7 welded on the wall 8 of the steel pipe well and playing a role of preventing confined water from seeping outwards, an air bag 3 positioned at the lower part of the water stop ring 7 in the well, wherein the air bag 3 is inflated through an air inlet pipe 1 and is tightly attached to the wall of the well, the well mouth is preliminarily sealed by utilizing the frictional resistance between the air bag and the wall of the steel pipe, a valve 2 capable of locking the air in the air bag 3 is arranged, and the air inlet pipe 1 at the upper part of the valve 2 can be cut; the upper part of the air bag 3 is poured with impervious concrete 6 which does not pass through the water stop ring 7, and the surface of the impervious concrete 6 is coated with a crystal micro-expansion water stop coating 5; and the well mouth of the well sealing is sealed by high-grade unexpanded concrete.
Example (b):
a confined water precipitation well shut-in device includes:
the device comprises a steel pipe 8 well pool, a water stop ring 7 welded on the wall 8 of the steel pipe well, an air bag 3 positioned at the lower part of the water stop ring 7 in the well, a valve 2 which can lock the air in the air bag 3, and a valve, wherein the air bag 3 is inflated through an air inlet pipe 1 and clings to the wall of the well to fully block the well pool; the upper part of the air bag 3 is poured with concrete 6 which does not cover the water stop ring 7, and the surface of the concrete 6 is coated with water stop paint 5.
Further, the inlet pipe 1 above the valve 2 may be trimmed after the valve 2 is closed.
Further, the concrete 6 is impervious concrete.
Further, the water-stop paint 5 is a crystalline micro-expansion water-stop paint.
Further, the well mouth of the well sealing is sealed by high-grade unexpanded concrete.
The construction method of the invention comprises the following steps of firstly pumping water 9 in a steel pipe 8 well pool until the water level is stable. And a water stop ring 7 is welded on the well wall 8, then the air bag 3 is placed in the well, and the air bag 3 is inflated through the air inlet pipe 1 until the air bag is tightly attached to the well wall, so that the well pool is fully plugged. The valve 2 is closed to lock the gas in the air bag, and then the gas inlet pipe 1 at the upper part of the valve is cut off. And pouring impervious concrete 6 on the upper part of the air bag until the impervious concrete submerges the top surface 7 of the water stop ring, after the impervious concrete has certain strength, coating crystalline micro-expansion water stop paint 5 on the surface of the impervious concrete, and finally plugging the wellhead by using high-grade unexpanded concrete.
The invention adopts the principle that: utilize the frictional resistance between gasbag and the steel pipe wall preliminarily to seal the well head, play the stagnant water effect on the one hand, on the other hand pours concrete for upper portion and provides supporting platform. And pouring concrete on the upper part of the air bag, welding a water stop ring, coating water stop paint and the like to further seal the wellhead of the confined water precipitation well and prevent confined water from leaking outwards.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (10)
1. The utility model provides a confined water precipitation well shut-in device which characterized in that includes:
the device comprises a steel pipe well pool, a water stop ring welded on the wall of the steel pipe well pool, an air bag positioned at the lower part of the water stop ring in the well, a valve which can lock the gas in the air bag, and a valve which is inflated by an air inlet pipe and clings to the wall of the well to fully block the well pool; the upper part of the air bag is poured with concrete which does not cover the water stop ring, and the surface of the concrete is coated with water stop paint.
2. The confined water dewatering well sealing device as claimed in claim 1, wherein: the inlet pipe above the valve can be cut off after the valve is closed.
3. The confined water dewatering well sealing device as claimed in claim 1, wherein: the concrete is impervious concrete.
4. The confined water dewatering well sealing device as claimed in claim 1, wherein: the water-stopping coating is a crystalline micro-expansion water-stopping coating.
5. The confined water dewatering well sealing device as claimed in claim 1, wherein: and the well mouth of the well sealing is sealed by high-grade unexpanded concrete.
6. A construction method of a confined water dewatering well sealing device is characterized by comprising the following steps,
s1, lowering water in the steel pipe well pool to a stable water level;
s2: placing the air bag into the well, and inflating the air bag until two sides of the air bag abut against the inner side of the well wall;
s3: concrete is poured over the air bags.
7. The construction method according to claim 6, wherein in step S1, after the water level is stabilized, a water stop ring is welded on the well wall, and the water stop ring is positioned above the air bag.
8. The construction method according to claim 6, wherein the step S2 further comprises closing a valve on an air inlet pipe of the air bag after the two sides of the air bag abut against the inner side of the well wall to sufficiently close the well pool, and cutting off the air inlet pipe at the upper part of the valve.
9. The construction method according to claim 6, wherein the concrete poured in step S3 is impervious concrete, and the surface of the impervious concrete is coated with the crystalline micro-expansive water-stop paint.
10. The construction method according to claim 6, wherein the step S3 further comprises finally plugging the wellhead with high grade unexpanded concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911234054.3A CN111305245A (en) | 2019-12-05 | 2019-12-05 | Confined water dewatering well sealing device and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911234054.3A CN111305245A (en) | 2019-12-05 | 2019-12-05 | Confined water dewatering well sealing device and construction method |
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| CN111305245A true CN111305245A (en) | 2020-06-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111926841A (en) * | 2020-08-04 | 2020-11-13 | 中天建设集团有限公司 | Dewatering well water-carrying plugging structure and construction method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202047416U (en) * | 2011-03-15 | 2011-11-23 | 北京中关村开发建设股份有限公司 | Well sealing device of pressure-reducing and dewatering well at elevator well pit |
| CN105780792A (en) * | 2016-04-12 | 2016-07-20 | 中南勘察设计院（湖北）有限责任公司 | Well plugging method and well plugging structure of high water head relief dewatering well in foundation pit |
| CN205444214U (en) * | 2015-12-23 | 2016-08-10 | 中铁建设集团有限公司 | Deep basal pit superelevation water level precipitation well well head plugging device |
| CN107620312A (en) * | 2017-08-27 | 2018-01-23 | 中铁十二局集团有限公司 | High hydraulic pressure precipitation well construction and hydrostatic slip casting method for blocking in a kind of Metro station excavation |
| CN208219682U (en) * | 2018-05-10 | 2018-12-11 | 浙江绿城房屋服务系统有限公司 | A kind of ultra-deep foundation pit decompression of confined water well shut-in well structure |
| CN111441374A (en) * | 2020-01-14 | 2020-07-24 | 中建六局建设发展有限公司 | Quick plugging construction method for high-water-pressure deep foundation pit dewatering well |
| CN211849528U (en) * | 2019-12-05 | 2020-11-03 | 中冶天工集团有限公司 | Confined water precipitation well shut-in device |
-
2019
- 2019-12-05 CN CN201911234054.3A patent/CN111305245A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202047416U (en) * | 2011-03-15 | 2011-11-23 | 北京中关村开发建设股份有限公司 | Well sealing device of pressure-reducing and dewatering well at elevator well pit |
| CN205444214U (en) * | 2015-12-23 | 2016-08-10 | 中铁建设集团有限公司 | Deep basal pit superelevation water level precipitation well well head plugging device |
| CN105780792A (en) * | 2016-04-12 | 2016-07-20 | 中南勘察设计院（湖北）有限责任公司 | Well plugging method and well plugging structure of high water head relief dewatering well in foundation pit |
| CN107620312A (en) * | 2017-08-27 | 2018-01-23 | 中铁十二局集团有限公司 | High hydraulic pressure precipitation well construction and hydrostatic slip casting method for blocking in a kind of Metro station excavation |
| CN208219682U (en) * | 2018-05-10 | 2018-12-11 | 浙江绿城房屋服务系统有限公司 | A kind of ultra-deep foundation pit decompression of confined water well shut-in well structure |
| CN211849528U (en) * | 2019-12-05 | 2020-11-03 | 中冶天工集团有限公司 | Confined water precipitation well shut-in device |
| CN111441374A (en) * | 2020-01-14 | 2020-07-24 | 中建六局建设发展有限公司 | Quick plugging construction method for high-water-pressure deep foundation pit dewatering well |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111926841A (en) * | 2020-08-04 | 2020-11-13 | 中天建设集团有限公司 | Dewatering well water-carrying plugging structure and construction method thereof |
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