CN105714840B - A kind of construction method of well-points dewatering - Google Patents
A kind of construction method of well-points dewatering Download PDFInfo
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- CN105714840B CN105714840B CN201610142966.8A CN201610142966A CN105714840B CN 105714840 B CN105714840 B CN 105714840B CN 201610142966 A CN201610142966 A CN 201610142966A CN 105714840 B CN105714840 B CN 105714840B
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- well
- pipe
- wellhole
- point
- filter assemblies
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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 at the construction field (site), the drilling well position of well point, grooved position, horizontal elevation are determined；(2) using drilling machinery it is determined that drilling well position, drill 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 to 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, play a part of supporting 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, carries 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
The present invention relates to a kind of construction method of the support ＆ protection of foundation pit for precipitation 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
Utilization of the thing for the underground space is more and more extensive, if the basement of building generally all reaches dried layer, foundation depth is very
To from more than ten meters to tens meters.Therefore, the 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, typically first crept into using general geology rig through mud off
After pore-forming, installation screen pipe forms pipe well, then is rinsed in screen pipe using high-pressure water jet, destroys slurry coat method structure sheaf,
And making screen pipe pipe week self-forming filter layer, then outlet pipe that front end is provided with to immersible pump is arranged in screen pipe, is finally opened
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 blocks, and causes well point to block as dried-up well.So that precipitation is unsuccessful, it is easy to causes 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 construction method of the back-up sand hardcore as filter layer in the borehole, but
It is that this kind of method equally has the defects of cumbersome of constructing, and is not avoided that alluvial blocks similarly, causing well point to block turns into
The defects of dried-up well.
The content of the invention
The present invention relates to a kind of construction method of well-points dewatering, the process for being effectively simplified construction so that practice of construction is grasped
Make simplicity, 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 at the construction field (site), drilling well position, the groove of well point are determined
Position, horizontal elevation；
(2) using drilling machinery it is determined that drilling well position, drill 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 to 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 supporting 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 are shaped generally as tubulose；
Sleeve, is covered in the outside of the filter layer of generally tubular, and the direction extended on the wall of sleeve along pipe sets several columns
The hole of rhombus, and the 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 that level of ground water does not reach predetermined design water level, and flow sensor detects flow velocity signal exception, then sentences
The wellhole of breaking is deposited, and closes the well-point pipe of the wellhole and the connection valve of water delivery house steward, 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 the present invention uses in construction are after the completion of expansion is constructed, radial through deformable
The water of tubular filter component passes through the filtering of each layer, without hindrance to discharge underground water, and sand and mud are blocked in wellhole.
In this way, the deformable tubulose filter assemblies after expansion cause the internal diameter maximum obtained after sand control, the aerial drainage face in wellhole is added
Product, while deformable tubulose filter assemblies have supporting role for borehole wall, are advantageous to the discharge of underground water, and can avoids well
Common caused annular plug, the phenomenon of borehole wall erosion due to space presence 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.
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 at the construction field (site), drilling well position, the groove of well point are determined
Position, horizontal elevation；
(2) using drilling machinery it is determined that drilling well position, drill 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 supporting 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 the strip crack in adjacent column is mutually staggered；Filter layer 2, covering
Base tube is shaped generally as tubulose；Sleeve 3, it is covered in the outside of the filter layer of generally tubular, the side extended on the wall of sleeve along pipe
To the hole for setting several columns rhombus, and the diamond hole in adjacent column mutually staggers.
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, overlapped sheet metal braiding can be used to form, be connected with each other between sheet metal, shape
Integral formula structure, and the internal surface of sleeve pipe with being covered in outside is connected；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 the dilatancy of a variety of methods formation 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；Preferably mode is another kind：Directly
Apply hydraulic coupling to the inside of deformable tubulose filter assemblies, make its expansion.
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 that level of ground water does not reach predetermined design water level, and flow sensor detects that flow velocity signal is different
Often, then judge that the wellhole is deposited, close the connection valve of the well-point pipe and water delivery house steward, the well-point pipe is extracted, clean end
The deformable tubulose filter assemblies in portion reinstall well-point pipe or the deformable tubulose filter assemblies that more renew after, 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, drill 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 to 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 supporting 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, carries 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 are shaped generally as tubulose；Filter layer includes three layer filtration material：Outer layer is the metal of relative coarseness
Material braiding layer, formed using overlapped sheet metal braiding, be connected with each other between sheet metal, form monolithic construction, and
It is connected with the internal surface of sleeve pipe for being covered in outside；Intermediate layer is that thread material continuous winding is formed, and the thread material is preferably
Stainless steel wire or synthetic fibres；Internal layer is stainless steel cloth or synthetic fiber cloth；
Sleeve, is covered in the outside of the filter layer of generally tubular, and the direction extended on the wall of sleeve along pipe sets several columns rhombus
Hole, and the diamond hole in adjacent column mutually staggers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610142966.8A CN105714840B (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 |
| CN201610142966.8A CN105714840B (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 |
|---|---|
| CN105714840A CN105714840A (en) | 2016-06-29 |
| CN105714840B true CN105714840B (en) | 2017-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610142966.8A Active CN105714840B (en) | 2015-03-13 | 2015-03-13 | A kind of construction method of well-points dewatering |
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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 CN201610142966.8A patent/CN105714840B/en active Active
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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105714840A (en) | 2016-06-29 |
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Effective date of registration: 20170721 Address after: 510640 Guangdong City, Tianhe District Province, No. five, road, public education building, unit 371-1, unit 2401 Applicant after: Guangdong Gaohang Intellectual Property Operation 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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Effective date of registration: 20171108 Address after: 225400 the south side of the East Road of Chengdong Industrial Park, Taizhou, Taixing, Jiangsu Applicant after: Taixing Dongcheng Water Treatment Engineering Co., Ltd. Address before: 510640 Guangdong City, Tianhe District Province, No. five, road, public education building, unit 371-1, unit 2401 Applicant before: Guangdong Gaohang Intellectual Property Operation Co., Ltd. |
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