CN105714839B - A kind of construction method of well-points dewatering - Google Patents
A kind of construction method of well-points dewatering Download PDFInfo
- Publication number
- CN105714839B CN105714839B CN201610140736.8A CN201610140736A CN105714839B CN 105714839 B CN105714839 B CN 105714839B CN 201610140736 A CN201610140736 A CN 201610140736A CN 105714839 B CN105714839 B CN 105714839B
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- Prior art keywords
- well
- filter assemblies
- pipe
- wellhole
- point
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Classifications
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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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention provides a kind of construction method of well-points dewatering, comprise the following steps：(1) according to the design drawing of well-points dewatering, surveying setting-out, determines drilling well position, grooved position, the horizontal elevation of well point at the construction field (site)；(2) using drilling machinery it is determined that drilling well position, get out the wellhole for meeting projected depth；(3) groove of digging laying well point pipeline；(4) pipe laying in wellhole is carried out, the well-point pipe that bottom is provided with deformable tubulose filter assemblies is put into wellhole, the bottom of well-point pipe is fixed at projected depth；(5) deformable tubulose filter assemblies are expanded, by deformable tubulose filter assemblies spreading, it is close on borehole wall, played a part of support borehole wall and filtering；(6) suction pump is installed, water delivery house steward is laid, each well-point pipe is obtained into water side and is connected with water delivery house steward, carry out construction of drawing water, the present invention is without hindrance in construction to discharge underground water, and sand and mud are blocked in wellhole.
Description
The present invention is application number：2015101103048, the applying date：2015-03-13, denomination of invention：A kind of well-points dewatering
Construction method divisional application.
Technical field
A kind of construction method of the support ＆ protection of foundation pit for precipitation the present invention relates to be used in architecture construction, especially a kind of well point
The construction method of precipitation.
Background technology
With the development of modern society, the use function of building is constantly expanded, particularly in big city, newly-built building
Thing is more and more extensive for the utilization of the underground space, if the basement of building generally all reaches dried layer, foundation depth is very
To from more than ten meters to tens meters.Therefore, method to foundation pit construction is it is also proposed that new requirement.
A kind of well-point dewatering construction technique of the prior art, is typically first crept into using general geology rig through mud off
After pore-forming, screen pipe is installed and forms pipe well, then rinsed using high-pressure water jet in screen pipe, destroy slurry coat method structure sheaf,
And make screen pipe pipe week self-forming filter layer, and then the outlet pipe that front end is provided with immersible pump is arranged in screen pipe, finally open
Dynamic immersible pump realizes well-points dewatering.But this kind of construction method is cumbersome in practice of construction, and screen pipe extremely easily becomes silted up
Product is blocked, and causes well point to block as dried-up well.So that precipitation is unsuccessful, it is easy to cause great engineering accident, such as the country repeatly
The foundation pit collapse accident appeared in the newspapers is relevant with this.
In existing construction method, also use and fill in the borehole construction method of the back-up sand hardcore as filter layer, but
It is that this kind of method equally has the cumbersome defect of construction, and is not avoided that alluvial is blocked similarly, causing well point to block turns into
The defect of dried-up well.
The content of the invention
The present invention relates to a kind of construction method of well-points dewatering, the operation of construction is effectively simplified so that practice of construction is grasped
Make easy, and be avoided that the situation that well point blocks.
The invention provides a kind of construction method of well-points dewatering, comprise the following steps：
(1) according to the design drawing of well-points dewatering, surveying setting-out, determines drilling well position, the groove of well point at the construction field (site)
Position, horizontal elevation；
(2) using drilling machinery it is determined that drilling well position, get out the wellhole for meeting projected depth；
(3) groove of digging laying well point pipeline；
(4) pipe laying in wellhole is carried out, the well-point pipe that bottom is provided with deformable tubulose filter assemblies is put into well
In hole, the bottom of well-point pipe is fixed at projected depth；
(5) deformable tubulose filter assemblies are expanded, by deformable tubulose filter assemblies spreading, it is close to well
On hole wall, play a part of support borehole wall and filtering；
(6) suction pump is installed, water delivery house steward is laid, the water side of each well-point pipe is connected with water delivery house steward, drawn water
Construction；
Wherein, deformable tubulose filter assemblies include：
Base tube, it is tubular part, is provided with the crack of several columns strip, and phase on base tube wall along the bearing of trend of pipe
Mutually stagger in strip crack in adjacent column；
Filter layer, covering base tube is shaped generally as tubulose；
Sleeve, is covered in the outside of the filter layer of generally tubular, and several columns are set along the direction that pipe extends on the wall of sleeve
The hole of rhombus, and diamond hole in adjacent column mutually staggers.
(7) in well-point pipe bottom and deformable tubulose filter assemblies junction, level sensor and flow sensor are set,
Level sensor and flow sensor are connected with control centre, when well-points dewatering construction operation for a period of time after, if water level
Sensor detects level of ground water and does not reach predetermined design water level, and flow sensor detects flow velocity signal exception, then sentence
There is alluvial in the wellhole of breaking, closes the well-point pipe of the wellhole and the connection valve of water delivery house steward, and the well-point pipe is extracted, and cleans end
Deformable tubulose filter assemblies reinstall well-point pipe or the deformable tubulose filter assemblies that more renew after, distending is again
Can.
The deformable tubulose filter assemblies that are used in construction of the present invention after the completion of construction is expanded, radial through deformable
The water of tubular filter component by each layer filtering, without hindrance discharges underground water, and sand and mud are blocked in wellhole.
In this way, the deformable tubulose filter assemblies after expansion cause that the internal diameter obtained after sand control is maximum, the earial drainage face in wellhole is increased
Product, while deformable tubulose filter assemblies have supporting role for borehole wall, is conducive to the discharge of underground water, and well is avoided that again
The common annular plug produced because space is present, the phenomenon of borehole wall erosion in hole.
Brief description of the drawings
Accompanying drawing 1 is deformable tubulose filter assemblies and its expansion schematic diagram.
Accompanying drawing 2 is the structural representation of deformable tubulose filter assemblies.
Specific embodiment
The construction method of certain engineering Deep Foundation Pit Well-Point Dewatering：Including
(1) according to the design drawing of well-points dewatering, surveying setting-out, determines drilling well position, the groove of well point at the construction field (site)
Position, horizontal elevation；
(2) using drilling machinery it is determined that drilling well position, get out the wellhole for meeting projected depth；
(3) groove of digging laying well point pipeline；
(4) pipe laying in wellhole is carried out；The drill bit of drilling machinery is specially withdrawn into wellhole, bottom is provided with can
The well-point pipe of deforming tubular filter assemblies is put into wellhole, and the bottom of well-point pipe is fixed at projected depth；
(5) deformable tubulose filter assemblies are expanded；By deformable tubulose filter assemblies spreading, it is set to be close to well
On hole wall, play a part of support borehole wall and filtering；
(6) suction pump is installed, water delivery house steward is laid, the water side of each well-point pipe is connected with water delivery house steward, drawn water
Construction.
As shown in Figure 2, deformable tubulose filter assemblies include：Base tube 1, it is tubular part, along pipe on base tube wall
Bearing of trend is provided with the crack of several columns strip, and strip crack in adjacent column is mutually staggered；Filter layer 2, covering
Base tube is shaped generally as tubulose；Sleeve 3, is covered in the outside of the filter layer of generally tubular, the side extended along pipe on the wall of sleeve
Mutually stagger to the hole for setting several columns rhombus, and diamond hole in adjacent column.
Filter layer 2 between base tube 1 and sleeve 3, when base tube 1 is radially expanded, due between base tube 1 and sleeve 3
Expansion is different, and filter layer 2 is necessary to ensure that the two will not be interfered.Filter layer 3 preferably comprises three layer filtration material：Outer layer is
The metal material braiding layer of relative coarseness, can be formed using overlapped sheet metal braiding, be connected with each other between sheet metal, shape
Integral formula structure, and be connected with the internal surface of sleeve pipe for being covered in outside；Intermediate layer is that thread material continuous winding is formed, the silk
The material of shape is preferably stainless steel wire or synthetic fibres；Internal layer is stainless steel cloth or synthetic fiber cloth.
As shown in Figure 1, deformable tubulose filter assemblies can utilize various methods to form the dilatancy of radial direction.It is preferred that
Mode be：The expansion vertebra 4 that can pass through is put into well-point pipe so that effect of the expansion vertebra 4 in mechanical force or hydraulic coupling
Under, through the inside of base tube, so that deformable tubulose filter assemblies are expanded；Another preferred mode is：Directly
Apply hydraulic coupling to the inside of deformable tubulose filter assemblies, expand it.
Further preferred construction method is：
Including：Step (7) sets level sensor and stream in well-point pipe bottom and deformable tubulose filter assemblies junction
Fast sensor, level sensor and flow sensor are connected with control centre, when well-points dewatering construction operation for a period of time after,
If level sensor detects level of ground water and does not reach predetermined design water level, and flow sensor to detect flow velocity signal different
Often, then judge that alluvial occurs in the wellhole, close the connection valve of the well-point pipe and water delivery house steward, the well-point pipe is extracted, clean end
After the deformable tubulose filter assemblies in portion reinstall well-point pipe or the deformable tubulose filter assemblies that more renew, distending is again
Can.
Claims (1)
1. a kind of construction method of well-points dewatering, comprises the following steps：
(1) according to the design drawing of well-points dewatering, surveying setting-out at the construction field (site), determine the drilling well position of well point, grooved position,
Horizontal elevation；
(2) using drilling machinery it is determined that drilling well position, get out the wellhole for meeting projected depth；
(3) groove of digging laying well point pipeline；
(4) pipe laying in wellhole is carried out, the well-point pipe that bottom is provided with deformable tubulose filter assemblies is put into wellhole,
The bottom of well-point pipe is fixed at projected depth；
(5) deformable tubulose filter assemblies are expanded, by deformable tubulose filter assemblies spreading, it is close to borehole wall
On, play a part of support borehole wall and filtering；
(6) suction pump is installed, water delivery house steward is laid, the water side of each well-point pipe is connected with water delivery house steward, carry out construction of drawing water；
Wherein, deformable tubulose filter assemblies include：
Base tube, it is tubular part, is provided with the crack of several columns strip, and adjacent column on base tube wall along the bearing of trend of pipe
In strip crack mutually stagger；
Filter layer, covering base tube is shaped generally as tubulose；
Sleeve, is covered in the outside of the filter layer of generally tubular, and several columns rhombus is set along the direction that pipe extends on the wall of sleeve
Hole, and diamond hole in adjacent column mutually staggers；
(7) in well-point pipe bottom and deformable tubulose filter assemblies junction, level sensor and flow sensor are set, by water
Level sensor and flow sensor are connected with control centre, when well-points dewatering construction operation for a period of time after, if level sensor
Device detects level of ground water and does not reach predetermined design water level, and flow sensor detects flow velocity signal exception, then judging should
Wellhole occur alluvial, close the well-point pipe of the wellhole and the connection valve of water delivery house steward, by the well-point pipe extract, clean end can
After deforming tubular filter assemblies reinstall well-point pipe or the deformable tubulose filter assemblies that more renew, distending again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610140736.8A CN105714839B (en) | 2015-03-13 | 2015-03-13 | A kind of construction method of well-points dewatering |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510110304.8A CN104674830B (en) | 2015-03-13 | 2015-03-13 | A kind of construction method of well-points dewatering |
| CN201610140736.8A CN105714839B (en) | 2015-03-13 | 2015-03-13 | A kind of construction method of well-points dewatering |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510110304.8A Division CN104674830B (en) | 2015-03-13 | 2015-03-13 | A kind of construction method of well-points dewatering |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105714839A CN105714839A (en) | 2016-06-29 |
| CN105714839B true CN105714839B (en) | 2017-06-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610140736.8A Expired - Fee Related CN105714839B (en) | 2015-03-13 | 2015-03-13 | A kind of construction method of well-points dewatering |
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| CN (1) | CN105714839B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5944427A (en) * | 1982-09-07 | 1984-03-12 | Ishikawajima Harima Heavy Ind Co Ltd | Sucker for ground-water |
| CN2331703Y (en) * | 1998-06-10 | 1999-08-04 | 上海宝钢冶金建设公司第五工程公司 | Miniature well-points dewatering device |
| JP2010138641A (en) * | 2008-12-12 | 2010-06-24 | Ohbayashi Corp | Daily use well and method for constructing the same |
| CN202227357U (en) * | 2011-09-14 | 2012-05-23 | 中建七局第二建筑有限公司 | Water-reducing tube well structure |
| CN203755325U (en) * | 2014-03-24 | 2014-08-06 | 昆山帝滤源塑管有限公司 | Unplasticized polyvinyl chloride (UPVC) composite downcast pipe |
-
2015
- 2015-03-13 CN CN201610140736.8A patent/CN105714839B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5944427A (en) * | 1982-09-07 | 1984-03-12 | Ishikawajima Harima Heavy Ind Co Ltd | Sucker for ground-water |
| CN2331703Y (en) * | 1998-06-10 | 1999-08-04 | 上海宝钢冶金建设公司第五工程公司 | Miniature well-points dewatering device |
| JP2010138641A (en) * | 2008-12-12 | 2010-06-24 | Ohbayashi Corp | Daily use well and method for constructing the same |
| CN202227357U (en) * | 2011-09-14 | 2012-05-23 | 中建七局第二建筑有限公司 | Water-reducing tube well structure |
| CN203755325U (en) * | 2014-03-24 | 2014-08-06 | 昆山帝滤源塑管有限公司 | Unplasticized polyvinyl chloride (UPVC) composite downcast pipe |
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| Publication number | Publication date |
|---|---|
| CN105714839A (en) | 2016-06-29 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Geng Lin Inventor after: Zhao Yong Inventor after: Cao Maodan Inventor after: Zhu Hongyi Inventor after: Zhang Yijun Inventor after: Wang Zhengzhe Inventor after: Liang Xiaodong Inventor after: Zhang Yingying Inventor after: Hu Yuwei Inventor after: Gu Ruiting Inventor after: Zhang Jie Inventor after: Zhao Yafeng Inventor after: Hu Yuanbo Inventor after: Zhang Hua Inventor after: Jiang Yunliang Inventor after: Fei Junfeng Inventor before: Chen Zhuojie |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20170531 Address after: 463000 No. 1088, Jiefang Road, Henan, Zhumadian Applicant after: Henan Tongtai Construction Engineering Co. Ltd. Address before: The 11 group Wang Xie village Beilun Daxie Development Zone 315812 area in Zhejiang city of Ningbo Province Applicant before: Chen Zhuojie |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170623 Termination date: 20210313 |
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| CF01 | Termination of patent right due to non-payment of annual fee |