CN104674830A - Construction method for well point dewatering - Google Patents
Construction method for well point dewatering Download PDFInfo
- Publication number
- CN104674830A CN104674830A CN201510110304.8A CN201510110304A CN104674830A CN 104674830 A CN104674830 A CN 104674830A CN 201510110304 A CN201510110304 A CN 201510110304A CN 104674830 A CN104674830 A CN 104674830A
- Authority
- CN
- China
- Prior art keywords
- well
- pipe
- filter assemblies
- tubulose filter
- point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010276 construction Methods 0.000 title claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000001914 filtration Methods 0.000 claims abstract description 24
- 238000005553 drilling Methods 0.000 claims abstract description 14
- 230000000712 assembly Effects 0.000 claims description 37
- 238000000429 assembly Methods 0.000 claims description 37
- 239000000463 material Substances 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 229920002994 synthetic fiber Polymers 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000009954 braiding Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 239000003673 groundwater Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000012209 synthetic fiber Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000002002 slurry Substances 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Paleontology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (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)
- Filtering Materials (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention provides a construction method for well point dewatering. The construction method comprises the following steps of (1) according to a design drawing for the well point dewatering, measuring and paying off at the construction site, and determining the well drilling location, channel position and horizontal elevation of a well point; (2) adopting a well drilling machine to drill a well hole with design depth at the determined well drilling position; (3) excavating and paving the channel of a well point pipeline; (4) paving the pipeline in the well hole, putting a well point pipe of which the bottom end is provided with a deformable pipe-shaped filtering assembly into the well hole, and fixing the bottom end of the well point pipe to the design depth; (5) expanding and opening the deformable pipe-shaped filtering assembly, and tightly attaching the deformable pipe-shaped filtering assembly to the wall of the well hole, so as to realize the functions of supporting the wall of the well hole and filtering; (6) installing a water suction pump, paving a water delivery main pipe, and connecting the water outlet end of each well point pipe and the water delivery main pipe, so as to perform the water suction construction. The construction method has the advantages that the underground water can be smoothly drained out, and the sand and slit are blocked into the well hole.
Description
Technical field
The present invention relates to the construction method of the support & protection of foundation pit for precipitation used in a kind of architecture construction, especially a kind of construction method of well-points dewatering.
Background technology
Along with the development of modern society, the using function of building is constantly expanded, and particularly in metropolis, newly-built building is more and more extensive for the utilization of the underground space, the basement of building all reaches some layers usually, and foundation depth is even from tens meters to tens meters.Therefore, new requirement is also proposed to the method for foundation pit construction.
A kind of well-point dewatering construction technique of the prior art, the general general geology rig that first adopts is after mud off drilling and forming hole, filter pipe is installed and forms pipe well, in filter pipe, adopt high-pressure water jet to rinse again, destroy slurry coat method deck, and making filter pipe pipe week self-forming filtration beds, the outlet pipe then front end being provided with submersible pump is arranged in filter pipe, finally starts submersible pump and realizes well-points dewatering.But this kind of construction method complex operation in practice of construction, and filter pipe extremely easily deposits blocking, and causing well point to block becomes dried-up well.Make precipitation unsuccessful, be easy to cause great engineering accident, the foundation pit collapse accident of appearing in the newspapers repeatly as domestic is relevant all therewith.
In existing construction method, also have to use and fill with the construction method of back-up sand hardcore as filtration beds in the borehole, but this kind of method has the loaded down with trivial details defect of construction equally, and can not avoid alluvial blocking too, causing well point to block becomes the defect of dried-up well.
Summary of the invention
The present invention relates to a kind of construction method of well-points dewatering, effectively simplify the operation of construction, make practice of construction easy and simple to handle, and the situation that well point can be avoided to block.
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, at the construction field (site) surveying setting-out, the drilling well position of well point, grooved position, horizontal elevation is determined;
(2) the drilling well position adopting drilling machinery determining, gets out the wellhole meeting projected depth;
(3) groove of digging laying well point pipeline;
(4) carry out the pipe laying in wellhole, well-point pipe bottom being provided with deformable tubulose filter assemblies puts into wellhole, and the bottom of well-point pipe is fixed to projected depth place;
(5) deformable tubulose filter assemblies is expanded, by deformable tubulose filter assemblies spreading, make it be close on borehole wall, play the effect supporting borehole wall and filtration;
(6) suction pump is installed, lays water delivery house steward, each well-point pipe is obtained water side and is connected with water delivery house steward, carry out construction of drawing water;
Wherein, deformable tubulose filter assemblies comprises:
Base tube, it is tubular part, base tube wall is provided with the crack of some row strips along the bearing of trend of pipe, and staggers mutually in the strip crack in adjacent column;
Filtration beds, covers base tube and is formed as generally tubular;
Sleeve, covers the outside of the filtration beds of tubulose, and the direction that the wall of sleeve extends along pipe arranges the hole of some row rhombuses, and the diamond hole in adjacent column staggers mutually.
Preferred further, filtration beds comprises three layer filtration material: the outer metal material braid for relative coarseness, adopts overlapped sheet metal braiding to form, is interconnected between sheet metal, form monolithic construction, and be connected with the internal surface of sleeve pipe covering outside; Intermediate layer is that thread material continuous winding is formed, and this thread material is preferably stainless steel wire or synthetic fibres; Internal layer is stainless steel cloth or synthetic fiber cloth.
Preferred further, the dilatancy mode of the radial direction of deformable tubulose filter assemblies is: in well-point pipe, put into the expansion vertebra that can pass through, make expansion vertebra under the effect of mechanical force or hydraulic coupling, through the inside of base tube, thus deformable tubulose filter assemblies is expanded.
Preferred further, directly apply hydraulic coupling to the inside of deformable tubulose filter assemblies, make it expand.
Preferred further, construction method comprises:
(7) in well-point pipe bottom and deformable tubulose filter assemblies junction, level sensor and flow sensor are set, sensor is connected with control centre, when after well-points dewatering construction operation a period of time, if sensor detects that groundwater table does not arrive predetermined design water level, and flow velocity signal is abnormal, then judge that alluvial appears in this wellhole, close the well-point pipe of this wellhole and the connection valve of water delivery house steward, this well-point pipe is extracted, after the deformable tubulose filter assemblies of cleaning end reinstalls well-point pipe or the deformable tubulose filter assemblies that more renews, again distending.
Underground water, after expansion construction completes, radial through the water of deformable tubulose filter assemblies through the filtration of each layer, expeditely to be discharged, and sand and mud is blocked in wellhole by the deformable tubulose filter assemblies that the present invention adopts in construction.So, the internal diameter obtained after deformable tubulose filter assemblies after expansion makes sand control is maximum, add the drainage area in wellhole, the tubulose of deformable simultaneously filter assemblies has supporting role for borehole wall, be conducive to the discharge of underground water, the annular plug produced because space exists common in wellhole, the phenomenon of borehole wall erosion can be avoided again.
Accompanying drawing explanation
Accompanying drawing 1 is deformable tubulose filter assemblies and expansion schematic diagram thereof.
Accompanying drawing 2 is structural representations of deformable tubulose filter assemblies.
Detailed description of the invention
The construction method of certain engineering Deep Foundation Pit Well-Point Dewatering: comprise
(1) according to the design drawing of well-points dewatering, at the construction field (site) surveying setting-out, the drilling well position of well point, grooved position, horizontal elevation is determined;
(2) the drilling well position adopting drilling machinery determining, gets out the wellhole meeting projected depth;
(3) groove of digging laying well point pipeline;
(4) pipe laying in wellhole is carried out; Be specially and the drill bit of drilling machinery is withdrawn wellhole, well-point pipe bottom being provided with deformable tubulose filter assemblies puts into wellhole, and the bottom of well-point pipe is fixed to projected depth place;
(5) deformable tubulose filter assemblies is expanded; By deformable tubulose filter assemblies spreading, make it be close on borehole wall, play the effect supporting borehole wall and filtration;
(6) suction pump is installed, lays water delivery house steward, each well-point pipe is obtained water side and is connected with water delivery house steward, carry out construction of drawing water.
As shown in Figure 2, deformable tubulose filter assemblies comprises: base tube 1, and it is tubular part, base tube wall is provided with the crack of some row strips along the bearing of trend of pipe, and staggers mutually in the strip crack in adjacent column; Filtration beds 2, covers base tube and is formed as generally tubular; Sleeve 3, covers the outside of the filtration beds of tubulose, and the direction that the wall of sleeve extends along pipe arranges the hole of some row rhombuses, and the diamond hole in adjacent column staggers mutually.
Filtration beds 2 between base tube 1 and sleeve 3, when base tube 1 expanded radially, because the expansion between base tube 1 and sleeve 3 is different, filtration beds 2 needs to guarantee that the two can not disturb mutually.Filtration beds 3 preferably comprises three layer filtration material: the outer metal material braid for relative coarseness, overlapped sheet metal braiding can be adopted to form, be interconnected, form monolithic construction, and be connected with the internal surface of sleeve pipe covering outside between sheet metal; Intermediate layer is that thread material continuous winding is formed, and this thread material 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 multiple method to form radial dilatancy.Preferred mode is: in well-point pipe, put into the expansion vertebra 4 that can pass through, and makes expansion vertebra 4 under the effect of mechanical force or hydraulic coupling, through the inside of base tube, thus deformable tubulose filter assemblies is expanded; Another kind of preferred mode is: directly apply hydraulic coupling to the inside of deformable tubulose filter assemblies, make it expand.
Preferred construction method is further:
Comprise: step (7) is in well-point pipe bottom and deformable tubulose filter assemblies junction, level sensor and flow sensor are set, sensor is connected with control centre, when after well-points dewatering construction operation a period of time, if sensor detects that groundwater table does not arrive predetermined design water level, and flow velocity signal is abnormal, then judge that alluvial appears in this wellhole, close the connection valve of this well-point pipe and water delivery house steward, this well-point pipe is extracted, after the deformable tubulose filter assemblies of cleaning end reinstalls well-point pipe or the deformable tubulose filter assemblies that more renews, again distending.
Claims (5)
1. a construction method for well-points dewatering, comprises the following steps:
(1) according to the design drawing of well-points dewatering, at the construction field (site) surveying setting-out, the drilling well position of well point, grooved position, horizontal elevation is determined;
(2) the drilling well position adopting drilling machinery determining, gets out the wellhole meeting projected depth;
(3) groove of digging laying well point pipeline;
(4) carry out the pipe laying in wellhole, well-point pipe bottom being provided with deformable tubulose filter assemblies puts into wellhole, and the bottom of well-point pipe is fixed to projected depth place;
(5) deformable tubulose filter assemblies is expanded, by deformable tubulose filter assemblies spreading, make it be close on borehole wall, play the effect supporting borehole wall and filtration;
(6) suction pump is installed, lays water delivery house steward, each well-point pipe is obtained water side and is connected with water delivery house steward, carry out construction of drawing water;
Wherein, deformable tubulose filter assemblies comprises:
Base tube, it is tubular part, base tube wall is provided with the crack of some row strips along the bearing of trend of pipe, and staggers mutually in the strip crack in adjacent column;
Filtration beds, covers base tube and is formed as generally tubular;
Sleeve, covers the outside of the filtration beds of tubulose, and the direction that the wall of sleeve extends along pipe arranges the hole of some row rhombuses, and the diamond hole in adjacent column staggers mutually.
2. the construction method of well-points dewatering as claimed in claim 1, it is characterized in that: filtration beds comprises three layer filtration material: the outer metal material braid for relative coarseness, overlapped sheet metal braiding is adopted to form, be interconnected between sheet metal, form monolithic construction, and be connected with the internal surface of sleeve pipe covering outside; Intermediate layer is that thread material continuous winding is formed, and this thread material is preferably stainless steel wire or synthetic fibres; Internal layer is stainless steel cloth or synthetic fiber cloth.
3. the construction method of well-points dewatering as claimed in claim 1, it is characterized in that: the dilatancy mode of the radial direction of deformable tubulose filter assemblies is: in well-point pipe, put into the expansion vertebra that can pass through, make expansion vertebra under the effect of mechanical force or hydraulic coupling, through the inside of base tube, thus deformable tubulose filter assemblies is expanded.
4. the construction method of well-points dewatering as claimed in claim 1, is characterized in that: the dilatancy mode of the radial direction of deformable tubulose filter assemblies is: directly apply hydraulic coupling to the inside of deformable tubulose filter assemblies, make it expand.
5. the construction method of well-points dewatering as claimed in claim 1, characterized by further comprising step:
(7) in well-point pipe bottom and deformable tubulose filter assemblies junction, level sensor and flow sensor are set, sensor is connected with control centre, when after well-points dewatering construction operation a period of time, if sensor detects that groundwater table does not arrive predetermined design water level, and flow velocity signal is abnormal, then judge that alluvial appears in this wellhole, close the well-point pipe of this wellhole and the connection valve of water delivery house steward, this well-point pipe is extracted, after the deformable tubulose filter assemblies of cleaning end reinstalls well-point pipe or the deformable tubulose filter assemblies that more renews, again distending.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610141389.0A CN105804104B (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 |
| CN201610142098.3A CN105735330B (en) | 2015-03-13 | 2015-03-13 | A kind of construction method of well-points dewatering |
| 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 |
Applications Claiming Priority (1)
| 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 |
Related Child Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610141389.0A Division CN105804104B (en) | 2015-03-13 | 2015-03-13 | A kind of construction method of well-points dewatering |
| CN201610142966.8A Division CN105714840B (en) | 2015-03-13 | 2015-03-13 | A kind of construction method of well-points dewatering |
| CN201610142098.3A Division CN105735330B (en) | 2015-03-13 | 2015-03-13 | A kind of construction method of well-points dewatering |
| CN201610140736.8A Division CN105714839B (en) | 2015-03-13 | 2015-03-13 | A kind of construction method of well-points dewatering |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104674830A true CN104674830A (en) | 2015-06-03 |
| CN104674830B CN104674830B (en) | 2016-08-17 |
Family
ID=53310377
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610141389.0A Active CN105804104B (en) | 2015-03-13 | 2015-03-13 | A kind of construction method of well-points dewatering |
| CN201510110304.8A Expired - Fee Related CN104674830B (en) | 2015-03-13 | 2015-03-13 | A kind of construction method of well-points dewatering |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610141389.0A Active CN105804104B (en) | 2015-03-13 | 2015-03-13 | A kind of construction method of well-points dewatering |
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| Country | Link |
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| CN (2) | CN105804104B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106337427B (en) * | 2016-09-26 | 2018-06-22 | 湖南科技大学 | A kind of deformation control method in the pre- dewatering construction of foundation pit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1317065A1 (en) * | 1985-06-17 | 1987-06-15 | Всесоюзный Научно-Исследовательский,Конструкторско-Технологический И Проектно-Изыскательский Институт По Осушению Месторождений Полезных Ископаемых,Специальным Горным Работам,Рудничной Геологии И Маркшейдерскому Делу | Method of constructing water intake well |
| DE3703534A1 (en) * | 1987-02-06 | 1988-08-25 | Bilfinger Berger Bau | Method for producing a well |
| CN102002959A (en) * | 2010-12-21 | 2011-04-06 | 上海广联建设发展有限公司 | Draining device of underground structure foundation and layout method thereof |
| CN202644552U (en) * | 2012-05-08 | 2013-01-02 | 上海市水利工程集团有限公司 | Light well-point dewatering device for cofferdam foundation pit |
| CN103526780A (en) * | 2013-10-23 | 2014-01-22 | 天津大学 | Water plugging seepage-proofing method for recharge well |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61211415A (en) * | 1985-03-18 | 1986-09-19 | Takenaka Komuten Co Ltd | Reduction well construction method |
| CN2563191Y (en) * | 2002-08-12 | 2003-07-30 | 李景新 | Water dropping machine for well point |
| CN100429356C (en) * | 2006-03-01 | 2008-10-29 | 冯克俊 | Vacuum foundation-pit deep-well precipitation apparatus |
| CN202194686U (en) * | 2011-08-03 | 2012-04-18 | 中铁十二局集团第四工程有限公司 | Well-point dewatering device at bottom of tunnel |
| CN102383437B (en) * | 2011-08-08 | 2015-05-20 | 河南理工大学 | Well point positioned pumping tubular well and well point positioned pumping method |
-
2015
- 2015-03-13 CN CN201610141389.0A patent/CN105804104B/en active Active
- 2015-03-13 CN CN201510110304.8A patent/CN104674830B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1317065A1 (en) * | 1985-06-17 | 1987-06-15 | Всесоюзный Научно-Исследовательский,Конструкторско-Технологический И Проектно-Изыскательский Институт По Осушению Месторождений Полезных Ископаемых,Специальным Горным Работам,Рудничной Геологии И Маркшейдерскому Делу | Method of constructing water intake well |
| DE3703534A1 (en) * | 1987-02-06 | 1988-08-25 | Bilfinger Berger Bau | Method for producing a well |
| CN102002959A (en) * | 2010-12-21 | 2011-04-06 | 上海广联建设发展有限公司 | Draining device of underground structure foundation and layout method thereof |
| CN202644552U (en) * | 2012-05-08 | 2013-01-02 | 上海市水利工程集团有限公司 | Light well-point dewatering device for cofferdam foundation pit |
| CN103526780A (en) * | 2013-10-23 | 2014-01-22 | 天津大学 | Water plugging seepage-proofing method for recharge well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105804104A (en) | 2016-07-27 |
| CN104674830B (en) | 2016-08-17 |
| CN105804104B (en) | 2017-08-15 |
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Effective date of registration: 20160719 Address after: 017, 315000, 128 Exhibition Road, Jiangdong District, Zhejiang, Ningbo Applicant after: NINGBO JIANGDONGFEICHUANG ELECTRONIS TECHNOLOGY 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: 20170811 Address after: 5, 158100 Permanent Committee of Mt. Hengshan District, Heilongjiang, Jixi Patentee after: Han Chunlin Address before: 017, 315000, 128 Exhibition Road, Jiangdong District, Zhejiang, Ningbo Patentee before: NINGBO JIANGDONGFEICHUANG ELECTRONIS TECHNOLOGY CO.,LTD. |
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