CN103866777B - Light well point dewatering construction method for shallow foundation pits of coastal areas - Google Patents
Light well point dewatering construction method for shallow foundation pits of coastal areas Download PDFInfo
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- CN103866777B CN103866777B CN201210525157.7A CN201210525157A CN103866777B CN 103866777 B CN103866777 B CN 103866777B CN 201210525157 A CN201210525157 A CN 201210525157A CN 103866777 B CN103866777 B CN 103866777B
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Abstract
A light well point dewatering construction method for shallow foundation pits of coastal areas is characterized in that deep suction high-pressure injection pumps (10) are used as water suction pumps, the horizontal directions of the deep suction high-pressure injection pumps (10) are mounted between bent connection tubes (8) and water collection header tubes (10). The deep suction high-pressure injection pumps (10) pump water uninterruptedly during water pumping, and water outflow valves of the deep suction high-pressure injection pumps (10) are examined and adjusted regularly during water pumping to control the water flow. Measures are required to be taken timely if the number of dead wells exceeds 10%, and repeated punching flushing is performed through high-pressure water. The method has the advantages that the method is simple, construction is simple and convenient, the dewatering effect is apparent, the smooth implementation of projects is guaranteed, the engineering cost is low, and the economic benefit is good.
Description
Technical field
The present invention relates to a kind of well-points dewatering construction method, specifically, it is a kind of for the shallower foundation ditch in border on the sea region
Light-duty well-points dewatering construction method.
Background technology
Well-points dewatering, is a kind of method of artificial dewatering.Fig. 1 is traditional known light well point structural representation
Figure.Application of light well point precipitation is because its plant is simple, easily operated, easy construction, economical rationality the advantages of be widely used in
In shallower foundation ditch (foundation trench) dewatering construction, but traditional Application of light well point precipitation is tens of groups of well-point pipes of a vacuum water pump band,
In soil layer containing silt particle or soft mud, dewatering effect is bad, is not particularly suitable for the well point fall in the shallower foundation ditch in border on the sea region (foundation trench)
Water.
Chinese patent CN102051886B discloses a kind of light-duty well-points dewatering construction method on the 15th in August in 2012, its
The middle outlet pipe that front end is provided with immersible pump is arranged in filter tube realizes well-points dewatering, and it is applied to weak-highly permeable soil layer
The excavation of foundation pit of middle or small depth natural discharging slope, applies also for silt, fine sand, coarse sand, gravel or cobble soil layer.But the method is not
The well-points dewatering of the shallower foundation ditch (foundation trench) in suitable border on the sea region, and the outlet pipe that front end is provided with immersible pump is arranged at filter tube
Interior construction operation is also time-consuming.
Therefore known light-duty well-points dewatering construction method has above-mentioned a variety of inconvenience and problem.
Content of the invention
The purpose of the present invention, is to propose a kind of light-duty well-points dewatering construction method for the shallower foundation ditch in border on the sea region.
For achieving the above object, the technical solution of the present invention is：
A kind of light-duty well-points dewatering construction method for the shallower foundation ditch in border on the sea region, is constructed using common well-points dewatering and flows
Journey：A surveying setting-out → groove → punching that digs a well → divide into water suction well-point pipe → filling fills out coarse sand filtrate → installation suction pump → laying
Water header → water header is connected → tries → foundation construction → withdraw well casing of drawing water → formally draw water, wherein each well with suction pump
Point pipe is connected with corresponding each curved connecting leg, and described curved connecting leg is connected it is characterised in that this is used for border on the sea region with water header again
The suction pump described in light-duty well-points dewatering construction method of shallower foundation ditch inhales HP jetting pump using deep, and its level is each curved to being arranged on
Between connecting leg and water header；Described deep suction HP jetting pump does not have a power failure to be carried out continuously during drawing water and draws water, in pump process
Middle running check and adjust the deep flowing water Valve inhaling HP jetting pump to control streamflow, and required by dropping to when level of ground water
After water level, the water yield making flowing water Valve, in 10～20L/min, makes suction water and draining keep uniformly, reaching and doing little by little without a break；Deep
Inhale HP jetting pump in pump process, when particularly starting to draw water, check for the dried-up well that well-point pipe silts up, by water in pipe
The method such as humidity carries out checking dried-up well for stream sound, tube surface；If dried-up well quantity is more than 10%, take measures in time,
Using water under high pressure, flushing is processed repeatedly；The described deep absolute pressure value inhaling HP jetting pump is arranged between 0.2～0.3Mpa, existing
Field sets special messenger and often observes, if finding vacuum degree deficiency in pump process, checks that whole pumping system has or not gas leakage link immediately,
And exclude in time.
The light-duty well-points dewatering construction method for the shallower foundation ditch in border on the sea region of the present invention can also be using following skill
Art measure to be realized further.
Aforesaid method, the wherein said deep power >=1.5KW inhaling HP jetting pump, flow is 1.8～5.4m3/ h, tool
There are sand prevention, high suction depth feature, suction >=16m.
Aforesaid method, water-aspirator pressure≤1.5MPa used when processing is rinsed in punching to wherein said water under high pressure repeatedly.
After technique scheme, the light-duty well-points dewatering construction method for the shallower foundation ditch in border on the sea region of the present invention
There is advantages below：
1st, method is simple, easy construction；
2nd, dewatering effect fairly obvious it is ensured that project is smoothly implemented；
3rd, engineering cost is cheap, good in economic efficiency.
Brief description
Fig. 1 is known light well point structural representation；
Fig. 2 is the improvement light well point structural representation of the present invention.
In figure：Outside 1 foundation ditch, in 2 foundation ditches, 3 vacuum jet pumps, 4 former levels of ground water, level of ground water after 5 declines, 6 well-point pipes,
7 ground, 8 curved connecting legs, 9 water headers, 10 deep suction HP jetting pumps.
Specific embodiment
With reference to embodiments and its accompanying drawing illustrates further to the present invention.
Embodiment 1
The light-duty well-points dewatering construction method for the shallower foundation ditch in border on the sea region of the present invention, is applied using common well-points dewatering
Work flow process：A surveying setting-out → groove → punching that digs a well → divide into water suction well-point pipe → filling fill out coarse sand filtrate → installation suction pump →
Laying water header → water header is connected → tries → foundation construction → withdraw well casing of drawing water → formally draw water with suction pump.This
Bright is to have made to improve on the basis of traditional light-duty well-points dewatering construction method.It changes the type of suction pump, in well point
Installation site in precipitation system and a series of control methods of correlation.Referring now to Fig. 1, Fig. 2 is that the improvement of the present invention is light-duty
Well point structural representation.As illustrated, described suction pump inhales HP jetting pump 10, the described deep work(inhaling HP jetting pump using deep
Rate is 1.5KW, and flow is 1.8～5.4m3/h.Each well-point pipe has oneself independent depth suction HP jetting pump to be drawn water, respectively
Deep HP jetting pump of inhaling is arranged between each curved connecting leg 8 and water header 9 with horizontal level；Described deep HP jetting pump 10 of inhaling exists
Do not have a power failure to be carried out continuously during drawing water and take out, running check and the flowing water Valve adjusting deep suction HP jetting pump 10 in pump process
To control streamflow, and after level of ground water drops to required water level, make the water yield 10～20L/min of flowing water Valve, to the greatest extent
Amount makes suction water and draining keep uniformly, reaching and doing little by little without a break.Application of light well point precipitation should often be checked, its water outlet rule should
" first big after small, first muddy rear clear ", if abnormal conditions, should be checked in time.Deep HP jetting pump 10 of inhaling is in pump process
In, when particularly starting to draw water, check for the dried-up well that well-point pipe silts up, can whether damp by in-pipe flow sound, tube surface
The method such as wet is checked；If dried-up well quantity is more than 10%, take measures in time at using water under high pressure repeatedly punching flushing
Reason.Vacuum is the major technique index that can Application of light well point precipitation be smoothed out precipitation, described deep suction HP jetting pump 10
Absolute pressure value is arranged between 0.2-0.3Mpa, and scene sets special messenger and often observes, if finding vacuum degree deficiency in pump process,
Check that whole pumping system has or not gas leakage link immediately, and exclude in time.Described deep HP jetting pump of inhaling is being made at punching flushing
During reason, water-aspirator pressure used does not exceed 1.5MPa, and during punching immersed tube, such as water-aspirator pressure, more than 1.5Mpa, may make immersed tube side
The variation of edge soil property is loose, and tube wall is excessive with soil layer gap, is finally difficult to form vacuum environment.
The light-duty well-points dewatering construction method for the shallower foundation ditch in border on the sea region of the present invention is on the point of in Eastern Fujian Pingtan
Use in sea region engineering, effect is significant, obtained exploiting entity, supervisor and owner's abundant affirmation.
Above example is used for illustrative purposes only, rather than limitation of the present invention, about the technology people of technical field
Member, without departing from the spirit and scope of the present invention, can also make various conversion or change.Therefore, all equivalent
Technical scheme also should belong to scope of the invention, should be limited by each claim.
Claims (2)
1. a kind of light-duty well-points dewatering construction method for the shallower foundation ditch in border on the sea region, is constructed using common well-points dewatering and flows
Journey：A surveying setting-out → groove → punching that digs a well → divide into water suction well-point pipe → filling fills out coarse sand filtrate → installation suction pump → laying
Water header → water header is connected → tries → foundation construction → withdraw well casing of drawing water → formally draw water, wherein each well with suction pump
Point pipe（6）With corresponding each curved connecting leg（8）Connection, described curved connecting leg and and water header（9）Connect it is characterised in that this is used for
The suction pump described in light-duty well-points dewatering construction method of the shallower foundation ditch in border on the sea region inhales HP jetting pump using deep（10）, its level
To being arranged on each curved connecting leg（8）And water header（9）Between；Described deep suction HP jetting pump（10）Do not have a power failure even during drawing water
Continue and drawn water, running check and regulation deep suction HP jetting pump in pump process（10）Flowing water Valve to control flowing water
Amount, and after level of ground water drops to required water level, the water yield making flowing water Valve in 10～20L/min, make suction water and
Draining keeps uniformly, reaching and doing little by little without a break；Deep suction HP jetting pump（10）In pump process, check for what well-point pipe silted up
Dried-up well, by in-pipe flow sound, tube surface, whether humid method carries out checking dried-up well；If dried-up well quantity is more than 10%, and
When take measures, using water under high pressure repeatedly punching flushing process；Described deep suction HP jetting pump（10）Absolute pressure value setting
Between 0.2～0.3Mpa, scene sets special messenger and often observes, if finding vacuum degree deficiency in pump process, checks whole immediately
Pumping system has or not gas leakage link, and excludes in time, the described deep power >=1.5KW inhaling HP jetting pump, and flow is 1.8～
5.4m3/ h, has sand prevention, high suction depth feature, suction >=16m.
2. be used for as claimed in claim 1 the light-duty well-points dewatering construction method of the shallower foundation ditch in border on the sea region it is characterised in that
Water-aspirator pressure≤1.5MPa used when processing is rinsed in punching to described water under high pressure repeatedly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210525157.7A CN103866777B (en) | 2012-12-10 | 2012-12-10 | Light well point dewatering construction method for shallow foundation pits of coastal areas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210525157.7A CN103866777B (en) | 2012-12-10 | 2012-12-10 | Light well point dewatering construction method for shallow foundation pits of coastal areas |
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| CN103866777A CN103866777A (en) | 2014-06-18 |
| CN103866777B true CN103866777B (en) | 2017-02-15 |
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| CN201210525157.7A Active CN103866777B (en) | 2012-12-10 | 2012-12-10 | Light well point dewatering construction method for shallow foundation pits of coastal areas |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104240578B (en) * | 2014-06-19 | 2016-08-17 | 北京工业大学 | A kind of simulation light-duty well-points dewatering construction teaching mode |
| CN104762982B (en) * | 2015-03-06 | 2016-06-29 | 中建三局第一建设工程有限责任公司 | The construction method that a kind of rich water red sandstone geology level of ground water controls |
| CN107916674B (en) * | 2017-12-07 | 2020-03-13 | 中冶天工集团有限公司 | Shallow foundation pit dewatering device |
| CN109972643A (en) * | 2019-05-06 | 2019-07-05 | 中国人民解放军空军工程大学 | A kind of region of FuShui base pit engineering Trinity joint precipitation system |
| CN113605425B (en) * | 2021-07-16 | 2022-06-21 | 江苏富源广建设发展有限公司 | Light well point combined type foundation pit dewatering device |
| CN116988499B (en) * | 2023-09-26 | 2023-11-28 | 中铁城建集团第一工程有限公司 | Site foundation pit drainage device and construction method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2225490Y (en) * | 1994-10-25 | 1996-04-24 | 王绍志 | Abreast jet well point machine group |
| 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 |
| CN101294393A (en) * | 2007-04-29 | 2008-10-29 | 上海市第七建筑有限公司 | Construction method with dewatering water well equipped outside of foundation pit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5813819A (en) * | 1981-07-19 | 1983-01-26 | Kato Seisakusho:Kk | Lowering work for ground water level |
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2012
- 2012-12-10 CN CN201210525157.7A patent/CN103866777B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2225490Y (en) * | 1994-10-25 | 1996-04-24 | 王绍志 | Abreast jet well point machine group |
| 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 |
| CN101294393A (en) * | 2007-04-29 | 2008-10-29 | 上海市第七建筑有限公司 | Construction method with dewatering water well equipped outside of foundation pit |
Non-Patent Citations (1)
| Title |
|---|
| 轻型井点降水在潘庄闸施工中的应用;常少林等;《河南水利与南水北调》;20100620(第6期);93-94 * |
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