CN205152968U - Precipitation tubular well structure - Google Patents

Precipitation tubular well structure Download PDF

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Publication number
CN205152968U
CN205152968U CN201520925279.4U CN201520925279U CN205152968U CN 205152968 U CN205152968 U CN 205152968U CN 201520925279 U CN201520925279 U CN 201520925279U CN 205152968 U CN205152968 U CN 205152968U
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CN
China
Prior art keywords
well
pipe
filter
precipitation
sand
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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.)
Expired - Fee Related
Application number
CN201520925279.4U
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Chinese (zh)
Inventor
贾剑伟
王行
要延凯
何丛飞
江志鹏
姬欧鸣
黄露
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China Construction Seventh Engineering Division Corp Ltd
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China Construction Seventh Engineering Division Corp Ltd
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Priority to CN201520925279.4U priority Critical patent/CN205152968U/en
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Publication of CN205152968U publication Critical patent/CN205152968U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model belongs to the technical field of foundation ditch precipitation construction technology and specifically relates to relate to well point dewatering technical field, specifically disclose a precipitation tubular well structure, including the well casing that is located the vertical precipitation well, the well casing is no sand cement pipe, the well casing is including real pipe and strainer, real pipe is located precipitation well head department, the strainer is located real pipe below, strainer outer wall cladding filter screen, it is equipped with the filter material layer to fill out between the filter screen and the precipitation well wall of a well, the mung bean sand through washing that the particle diameter is 3~5mm is filled to the filter material in situ, the strainer aperture is less than 3mm, the porosity of strainer is greater than 30%, the thickness on filter material layer is greater than well casing pipe the thickness of the wall. The utility model discloses can effective control sand output, prevent in the well water that the sand content exceeds standard to cause the influence to drainage engineering, can improve the efficiency of construction, save construction cost.

Description

A kind of precipitation pipe well structure
Technical field
The utility model relates to foundation pit dewatering technical field of construction, especially relates to well-points dewatering technical field.
Background technology
At thick-layer sand and powder land floor, when the excavation of foundation pit degree of depth is positioned at below groundwater table absolute altitude, foundation pit dewatering must be carried out.General precipitation method is hole peripheral hardware well, encloses to fall control groundwater table as adopted light well point method formation of drawing water.But take the method that well-points dewatering is set in proposed building periphery to be difficult to ensure to be reduced to by the water level at most deep location (elevator shaft and the sump) place in basement 500mm under its foundation pad absolute altitude due to the reason of geological condition and groundwater seepage coefficient.
In prior art foundation ditch, to control pipe well difficulty of shaking out at thick-layer sand and powder land floor large for tube well dewatering, and in well water, sand content exceeds standard, easily filter pipe in blocking pipe well, causes water pump in pipe well to damage, impacts drainage works.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of precipitation pipe well structure, effectively can control sand production rate, prevents sand content in well water from exceeding standard and to impact drainage works, can improve efficiency of construction, saves construction cost.
For solving the problems of the technologies described above, technical solution adopted in the utility model is: a kind of precipitation pipe well structure, comprise the well casing being positioned at vertical pumping well, described well casing is sand-free concrete tube, described well casing comprises real pipe and filter pipe, described real pipe is positioned at precipitation well head place, described filter pipe is positioned at below real pipe, the coated filter screen of described filter pipe outer wall, fill out between described filter screen and the dewatering well borehole wall and be provided with filter material layer, fill in described filter material layer particle diameter be 3 ~ 5mm through water washed mineral granule, described filter pipe side-wall hole, its aperture is less than 3mm, the porosity of described filter pipe is greater than 30%, the thickness of described filter material layer is greater than the thickness of well casing tube wall.
Preferably, described filter screen is non-woven fabrics.
Further, described well casing is connected and composed in turn by more piece sand-free concrete tube, sand-free concrete tube junction outer cladding filter bag.
Preferably, each joint length of described sand-free concrete tube is 1m, and filter bag width is 0.2m.
Further, the thickness of described filter material layer is 80 ~ 90mm, and the thickness of described well casing tube wall is 40 ~ 60mm.
Further, tile successively and be provided with silt matter argillic horizon, boulder bed in the bottom of described dewatering well.
Further, the below of described silt matter argillic horizon is provided with concrete well seat.
Adopt the beneficial effect that produces of technique scheme to be: fill in the utility model filter material layer 3 ~ 5mm through water washed mineral granule, adopt the sand production rate that the method controlling sand with sand can effectively control in precipitation pipe well in water; Filter screen increases the space between filter material layer and well casing filter pipe, ensures that the uniform fluid flow of the bed of material after filtration passes into filter pipe; The utility model can prevent from sand content in well water from exceeding standard impacting drainage works, effectively reduce a large amount of losses of grogs, reduce labour intensity, can improve efficiency of construction, save construction cost.The utility model is particularly useful for precipitation in foundation ditch that geology is thick-layer sand and powder land floor.
Accompanying drawing explanation
Fig. 1 is the vertical section structure schematic diagram of the utility model embodiment;
Fig. 2 is the cross section structure schematic diagram of the utility model embodiment;
Fig. 3 is the syndeton schematic diagram in the utility model embodiment between well casing.
Wherein, 1, well casing; 2, filter screen; 3, filter material layer; 4, filter bag; 5, iron wire; 6, boulder bed; 7, silt matter argillic horizon; 8, well seat.
Detailed description of the invention
In order to clearly the utility model can be described, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
A kind of precipitation pipe well structure, comprise the well casing 1 being positioned at vertical pumping well, well casing 1 is sand-free concrete tube, well casing 1 comprises real pipe and filter pipe, real pipe is positioned at precipitation well head place, filter pipe is positioned at below real pipe, the coated filter screen 2 of filter pipe outer wall, fill out between filter screen 2 and the dewatering well borehole wall and be provided with filter material layer 3, fill in filter material layer 3 particle diameter be 3 ~ 5mm through water washed mineral granule, filter pipe side-wall hole, its aperture is less than 3mm, the porosity of filter pipe is greater than 30%, and the thickness of filter material layer 3 is greater than the thickness of well casing 1 tube wall.
Filter screen 2 is compact voids and has the material of some strength, preferably adopts non-woven fabrics multi-lay winding.
Implementation process, well casing 1 adopts and is connected and composed in turn by more piece sand-free concrete tube, sand-free concrete tube junction outer cladding filter bag 4, is fixed by iron wire 5 colligation.
Preferably, each joint length of sand-free concrete tube is 1m, and filter bag 4 width is 0.2m, more suitable in cost of manufacture and service efficiency.
In general construction, the thickness of filter material layer 3 is 80 ~ 90mm, and the thickness of well casing 1 tube wall is 40 ~ 60mm.Can ensure suitable drainage efficiency and control sand production rate, the safety factor of simultaneously constructing is higher.
To the further improvement of the technical program, tile successively and be provided with silt matter argillic horizon 7, boulder bed 6 in the bottom of dewatering well.
To the further improvement of the technical program, the below of silt matter argillic horizon 7 is provided with concrete well seat 8.
Concrete well seat 8 and silt matter argillic horizon 7, boulder bed 6 form gradient screening system, can effectively filter the water outlet in shaft bottom, prevent the pumping system that shaft bottom shakes out in destruction pipe well in a large number.
Embodiment
Adopt light well point method to carry out dewatering construction to proposed building basement elevator shaft, sump, its precipitation pipe well structure adopts the utility model to construct for the precipitation pipe well of foundation pit dewatering.First carry out pit earthwork excavation, dig to the above appropriate location of the above groundwater table of basement substrate absolute altitude, according to construction drawing, release position, well point with total powerstation; Get pipe well with rig, adopt mud off formula pore-forming (mixing expansive soil), during pore-forming, ensure that hole wall is vertical; To pipe well basis rest concrete well seat 8, then sink to well casing 1 vertically, section by section; After well casing enters for 1 time, between well casing 1 and hole wall, layering is inserted through washing 2 ~ 3 times mineral granule filtrates in time; In well, insert contour silt matter argillic horizon 7 and boulder bed 6 again, finally seal, in 8 hours, clean well with foul water pump, unimpeded to guarantee the permeation pathway of water.
The utility model embodiment arranges underground water filtering system to bottom pipe well sidewall and pipe well respectively, effectively sand production rate can be controlled to when pipe well infiltration capacity at guarantee underground water, prevent from sand content in well water from exceeding standard to impact drainage works, can efficiency of construction be improved, save construction cost.

Claims (7)

1. a precipitation pipe well structure, comprise the well casing (1) being positioned at vertical pumping well, described well casing (1) is sand-free concrete tube, described well casing (1) comprises real pipe and filter pipe, it is characterized in that: described real pipe is positioned at precipitation well head place, described filter pipe is positioned at below real pipe, the coated filter screen of described filter pipe outer wall (2), fill out between described filter screen (2) and the dewatering well borehole wall and be provided with filter material layer (3), fill in described filter material layer (3) particle diameter be 3 ~ 5mm through water washed mineral granule, described filter pipe side-wall hole, its aperture is less than 3mm, the porosity of described filter pipe is greater than 30%, the thickness of described filter material layer (3) is greater than the thickness of well casing (1) tube wall.
2. a kind of precipitation pipe well structure according to claim 1, it is characterized in that, described filter screen (2) is non-woven fabrics.
3. a kind of precipitation pipe well structure according to claim 1, it is characterized in that, described well casing (1) is connected and composed in turn by more piece sand-free concrete tube, sand-free concrete tube junction outer cladding filter bag (4).
4. a kind of precipitation pipe well structure according to claim 3, is characterized in that, each joint length of described sand-free concrete tube is 1m, and filter bag (4) width is 0.2m.
5. a kind of precipitation pipe well structure according to claim 1, it is characterized in that, the thickness of described filter material layer (3) is 80 ~ 90mm, and the thickness of described well casing (1) tube wall is 40 ~ 60mm.
6. a kind of precipitation pipe well structure according to claim 1, it is characterized in that, tile successively and be provided with silt matter argillic horizon (7), boulder bed (6) in the bottom of described dewatering well.
7. a kind of precipitation pipe well structure according to claim 6, it is characterized in that, the below of described silt matter argillic horizon (7) is provided with concrete well seat (8).
CN201520925279.4U 2015-11-19 2015-11-19 Precipitation tubular well structure Expired - Fee Related CN205152968U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520925279.4U CN205152968U (en) 2015-11-19 2015-11-19 Precipitation tubular well structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520925279.4U CN205152968U (en) 2015-11-19 2015-11-19 Precipitation tubular well structure

Publications (1)

Publication Number Publication Date
CN205152968U true CN205152968U (en) 2016-04-13

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106436717A (en) * 2016-07-22 2017-02-22 江苏科兴项目管理有限公司 Impervious curtain river-near foundation pit adopting dewatering wells and design method
CN106930304A (en) * 2017-03-24 2017-07-07 中冶建工集团有限公司 Drift sand base pit dewatering construction method
CN109577353A (en) * 2018-11-07 2019-04-05 江苏兴厦建设工程集团有限公司 A kind of prefabricated regenerated aggregate concrete downcast well pipe and its construction method
CN110306579A (en) * 2019-05-08 2019-10-08 北京正和恒基滨水生态环境治理股份有限公司 Method on Dewatering of Foundation Pit
CN111456054A (en) * 2020-04-14 2020-07-28 山东大学 Pipe well structure suitable for high-permeability alluvial stratum, precipitation construction system and precipitation construction method
CN111501804A (en) * 2020-04-10 2020-08-07 山东省地质矿产勘查开发局八〇一水文地质工程地质大队 Precipitation structure for preventing earthwork construction from being submerged and construction method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106436717A (en) * 2016-07-22 2017-02-22 江苏科兴项目管理有限公司 Impervious curtain river-near foundation pit adopting dewatering wells and design method
CN106930304A (en) * 2017-03-24 2017-07-07 中冶建工集团有限公司 Drift sand base pit dewatering construction method
CN109577353A (en) * 2018-11-07 2019-04-05 江苏兴厦建设工程集团有限公司 A kind of prefabricated regenerated aggregate concrete downcast well pipe and its construction method
CN110306579A (en) * 2019-05-08 2019-10-08 北京正和恒基滨水生态环境治理股份有限公司 Method on Dewatering of Foundation Pit
CN111501804A (en) * 2020-04-10 2020-08-07 山东省地质矿产勘查开发局八〇一水文地质工程地质大队 Precipitation structure for preventing earthwork construction from being submerged and construction method
CN111456054A (en) * 2020-04-14 2020-07-28 山东大学 Pipe well structure suitable for high-permeability alluvial stratum, precipitation construction system and precipitation construction method
CN111456054B (en) * 2020-04-14 2021-04-30 山东大学 Pipe well structure suitable for high-permeability alluvial stratum, precipitation construction system and precipitation construction method

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160413

Termination date: 20161119