CN104594325B - A kind of Quaternary system low pressure water protects spring inverted well and method - Google Patents
A kind of Quaternary system low pressure water protects spring inverted well and method Download PDFInfo
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- CN104594325B CN104594325B CN201510016027.4A CN201510016027A CN104594325B CN 104594325 B CN104594325 B CN 104594325B CN 201510016027 A CN201510016027 A CN 201510016027A CN 104594325 B CN104594325 B CN 104594325B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
- E02D31/04—Watertight packings for use under hydraulic pressure
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- General Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Agronomy & Crop Science (AREA)
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
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Abstract
The invention discloses a kind of Quaternary system low pressure water and protect spring inverted well and method, inverted well includes wellhead component, underground component and overcoat, and wherein, described underground component includes the well casing and the filter pipe that are sequentially connected from top to bottom；Described wellhead component is arranged at the port position of inverted well, it is connected with underground component, overcoat includes double-deck sealing layer, water barrier and double medium filtration layer, double-deck sealing layer parcel well casing, being arranged at outside it, the arranged outside of double-deck sealing layer has water barrier, includes double medium filtration layer outside filter pipe, filter pipe lower end is provided with pump chamber, is provided with back and raises immersible pump in pump chamber.The invention solves long lasting for pushing back filling borehole wall preventing water phenomenon, improve water recharge capacity.Solving on the basis of inverted well physical clogging, reduce the process of the recharging disturbance to aquifer permeability, ensure that the former penetrating power in water-bearing layer greatly.
Description
Technical field
The present invention relates to a kind of Quaternary system low pressure water and protect spring inverted well and method.
Background technology
Geohydrologic unit class area for relative closure, spring territory subsoil water has and buries feature shallow, that rich water amount is big, and in underground engineering construction process, soil excavation base pit dewatering amount is very big, springs can be threatened gush, produce destroy and Adjacent Buildings is had harmful effect to geological environment around.For balance urban construction and environmental geological protection problem; at present; according to region hydrogeology feature needs; carrying out that pressurization recharges is maximally effective solution; but there is following defect in existing common inverted well technique: filling process has destruction recharge, continuing to have to push back, the phenomenon that the penetrating power in water-bearing layer, the amount of recharging carry out decaying in time; recharging borehole wall separates the water concrete and can produce spilling water phenomenon with stratum, return Yang Shixu and again descend pump, efficiency is recharged in impact.
Summary of the invention
The present invention is to solve the problems referred to above, it is proposed that a kind of Quaternary system low pressure water is protected spring inverted well and become well and method, this device solves long lasting for pushing back the filling borehole wall and filling out gravel and contact band, fill out gravel and contact band preventing water phenomenon with stratum, improves water recharge capacity；Reduce the process of the recharging disturbance to flow field, water-bearing layer, ensure that the former penetrating power in water-bearing layer greatly, it is ensured that have good current infiltration lane in well, shorten back the time of raising, improve and recharge efficiency.
To achieve these goals, the present invention adopts the following technical scheme that
A kind of Quaternary system low pressure water protects spring inverted well, and including wellhead component, underground component and overcoat, wherein, described underground component includes the well casing and the filter pipe that are sequentially connected from top to bottom；Described wellhead component is arranged at the port position of inverted well, it is connected with underground component, overcoat includes double-deck sealing layer, water barrier and double medium filtration layer, double-deck sealing layer parcel well casing, being arranged at outside it, the bottom of double-deck sealing layer is provided with water barrier, includes double medium filtration layer outside filter pipe, filter pipe lower end is provided with pump chamber, is provided with back and raises immersible pump in pump chamber.
Described wellhead component, including recharge passage, return raise passage and air bleeding valve, recharge valve and return raise valve, wherein, air bleeding valve is arranged on wellhead assembly, for controlling well inner air tube, recharge valve and be arranged at and recharge the outer device junction of passage and well, return and raise valve and be arranged at back and raise passage upper end；Recharge passage, return and raise passage and connect well casing each through wellhead assembly.
Described double-deck sealing layer, including the fixing sealing layer of concrete and clay ball sealing layer, wherein, the fixing sealing layer of concrete is arranged at well casing and wellhead component junction and well casing upper end, and described clay ball sealing layer is arranged at well casing lower end.
The fixing sealing layer arranged outside of described concrete has cement injection water barrier, extends to the junction of the fixing sealing layer of concrete and clay ball sealing layer.
The fixing sealing layer of described concrete to wellhead component adopts rammer filling jarring closely knit, makes rammer layer fully fully bond with grouting cement.
Described cement injection water barrier adopts two to open grouting process, and one opens 600mm becomes well cement slip casting, and two open 500mm becomes well.
Described double medium filtration layer, fills out gravel bed including internal layer quartz sand and limestone rubble fills out gravel bed, and internal layer quartz sand is filled out gravel bed and is wrapped in the outside of filter pipe, and limestone rubble is filled out gravel bed wrapping inner layer quartz sand and filled out gravel bed.
It is 2-4mm that described internal layer quartz sand fills out the ballast grain sizes of gravel bed；It is 5-20mm that limestone rubble fills out the ballast grain sizes of gravel bed.
Described internal layer quartz sand fills out gravel bed and limestone rubble is filled out the layering of gravel bed and filled out gravel and utilize pvc pipe successively to insert.
Raise immersible pump for described time and be arranged at distance inverted well shaft bottom 0.3-0.7m, fully blocking float is discharged, it is ensured that Hui Yang directly arrives wellhead component by well casing.
Described well casing is steel pipe.
A kind of process suitable in above-mentioned inverted well, comprises the following steps:
(1) inverted well is followed successively by wellhead component, steel pipe, filter pipe and pump chamber from top to bottom, and wellhead component is that Hui Yang recharges integrated device；
(2) filling out gravel between filter pipe and water-bearing layer adopts layering to fill out gravel way, and internal layer adopts quartz sand, and outer layer adopts carbonate rubble；
(3) steel pipe arranged outside has double-deck sealing layer and two to open grouting process water barrier, upper strata sealing layer is the fixing sealing layer of concrete, lower floor's sealing layer is clay ball sealing layer, and top sealing layer to wellhead component adopts rammer filling jarring closely knit, makes rammer layer fully fully bond with grouting cement；
(4) immersible pump is set bottom well casing.
In described step (2), layering is filled out gravel and is utilized pvc pipe, caliber 400mm, successively inserts by calculating, increases back the cycle of raising；Double medium filtration layer is internal layer quartz sand, and particle diameter is 2-4mm, and filtration outer layer is carbonate rubble, and particle diameter is 5-20mm.
In described step (3), two open grouting process water barrier is out that 600mm becomes well cement slip casting, and two open 500mm becomes well.
The invention have the benefit that
(1) adopting Novel wellhead well drilling technology, make when continuing to push back filling pressure and reaching 1MPa, the borehole wall is without overflow phenomena, it is achieved that inverted well persistent pressure is recharged, and can increase and recharge flow 80% under continuous state；
(2) wellhead component includes recharging passage and raises passage with returning, and shortens back the time of raising, improves and recharge efficiency；
(3) gravel technique is filled out in employing; while ensureing the cross-section of river; outer layer adopts the particle diameter 5-20mm limestone rubble close with water-bearing layer; make inverted well flow field and water-bearing layer flow field similarity; protect the lasting penetrating power recharging water-bearing layer; internal layer adopts 2-4mm quartz sand, can play the effect of fixing well casing and water-bearing layer, can effectively filter again water-bearing layer float；
(4) solve long lasting for there being pressure inverted well respectively to contact band preventing water phenomenon, improve water recharge capacity；Reduce the process of the recharging disturbance to flow field, water-bearing layer, ensure that the former penetrating power in water-bearing layer greatly, it is ensured that have good current infiltration lane in well, shorten back the time of raising, improve and recharge efficiency.
Accompanying drawing explanation
Fig. 1 is the one-tenth well construction figure of the present invention；
Fig. 2 is the wellhead component sketch of the present invention.
Wherein, 1, air bleeding valve；2, valve is recharged；3, return and raise valve；4, wellhead assembly；5, the fixing sealing layer of concrete；6, one 600mm one-tenth well slip casting is opened；7, cement injection water barrier；8, clay ball sealing layer；9, two perforate footpath 500mm；10, well casing；11, limestone rubble fills out gravel bed；12, pvc pipe layering；13, internal layer quartz sand fills out gravel bed；14, filter pipe；15, return and raise immersible pump.
Detailed description of the invention:
Below in conjunction with accompanying drawing, the invention will be further described with embodiment.
As it is shown in figure 1, a kind of ground water recharging well, including wellhead component 4, common steel tube, filter pipe 14 and pump chamber from top to bottom successively, outside is followed successively by double-deck sealing layer, water barrier and double medium filtration under upper.Filter pipe 14 is bridge type filter pipe, and double medium filtration layer is that gradual change type filters gravel material, and nexine gravel material adopts quartz sand, grains of sand diameter 2-4mm, outer layer gravel material adopts limestone rubble, particle diameter 4-20mm, upper part of double water barrier, outer layer is grouting cement layer, and internal layer is rammed concrete layer.
This ground water recharging well is from top to bottom, including wellhead component 4 from inside to outside successively, concrete fixes sealing layer 5, cement injection water barrier 7, clay ball sealing layer 8, well casing 10, limestone rubble fills out gravel bed 11, stone sizes 5-20mm, internal layer quartz sand fills out gravel bed 13, particle diameter 2-4mm, bridge type filter pipe 14, returns and raises immersible pump 15.In this enforcement, 6 are out that 600mm becomes well grouting process, after cement setting is fixing, again adopt 9 one-tenth of 500mm aperture well, and the adhesive power of 5 concrete water barriers and 7 grouting cements is far longer than the adhesive power with Quaternary system.
As in figure 2 it is shown, wherein wellhead component 4 mainly includes air bleeding valve 1, recharges valve 2, returns and raise valve 3, when starting to recharge, in pit shaft, air can enter water-bearing layer along with recharge water, causes gas bubble blockage, controls air in pit shaft when recharging and carrying out with 1 air bleeding valve.Carrying out along with recharging, because plugging reason, the amount of recharging can decay gradually, it is therefore desirable to is periodically subject to Hui Yang, will recharge valve 2 and close, and opens back and raises valve 3, starts shaft bottom immersible pump.
Wellhead component includes recharging passage and raises passage with returning, and recharges valve 2 and is arranged at and recharges on passage, returns and raises valve 3 and be arranged at back and raise on passage, shortens back the time of raising, improve and recharge efficiency.
Gravel is filled out in this technology well drilling technology pvc pipe layering 12, after completing to wash downhole tubular, additionally uses to enter under diameter 400mmPVC pipe, inserts 2-4mm quartz sand by calculating internal layer, and outer layer inserts 5-20mm limestone gravel, recharges water-bearing layer thickness until exceeding.Top concrete is closely knit after inserting, so as to fully bond with cement.
It is close with water-bearing layer macadam gradating that its ectomesoderm fills out gravel macadam gradating requirement.
Perforate uses 600mm aperture Cheng Jing, adopts cement injection to relative water resisting layer, then uses 500mm aperture Cheng Jing again, fully solves borehole wall overflow phenomena.Inverted well is followed successively by wellhead component, steel pipe, filter pipe and pump chamber from top to bottom, fills out gravel and adopt layering to fill out gravel way between filter pipe and water-bearing layer, and internal layer adopts quartz sand, particle diameter 2-4mm, and outer layer adopts carbonate rubble, particle diameter 5-20mm.Wherein layering is filled out gravel and is utilized common PVC pipe, caliber 400mm, successively inserts by calculating, considerably increases back the cycle of raising.Top sealing layer to wellhead component adopts rammer filling jarring closely knit, makes rammer layer fully fully bond with grouting cement.
Setting immersible pump bottom well casing, this immersible pump is from shaft bottom 0.5m, it is possible to make back to raise better effects if, moreover it is possible to fully blocking float being discharged, Hui Yangke directly arrives wellhead component by well casing, shortens back the time of raising, greatly improves and recharge efficiency.
The specific embodiment of the present invention is described in conjunction with accompanying drawing although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme, those skilled in the art need not pay various amendments or deformation that creative work can make still within protection scope of the present invention.
Claims (9)
1. Quaternary system low pressure water protects a spring inverted well, it is characterized in that: include wellhead component, underground component and overcoat, and wherein, described underground component includes the well casing and the filter pipe that are sequentially connected from top to bottom；Described wellhead component is arranged at the port position of inverted well, it is connected with underground component, overcoat includes double-deck sealing layer, water barrier and double medium filtration layer, double-deck sealing layer parcel well casing, being arranged at outside it, the arranged outside of double-deck sealing layer has water barrier, includes double medium filtration layer outside filter pipe, filter pipe lower end is provided with pump chamber, is provided with back and raises immersible pump in pump chamber；
Described double-deck sealing layer, including the fixing sealing layer of concrete and clay ball sealing layer, wherein, the fixing sealing layer of concrete is arranged at well casing and wellhead component junction and well casing upper end, and described clay ball sealing layer is arranged at well casing lower end.
2. a kind of Quaternary system low pressure water as claimed in claim 1 protects spring inverted well, it is characterized in that: described wellhead component, including recharge passage, return raise passage and air bleeding valve, recharge valve and return raise valve, wherein, air bleeding valve is arranged on well casing, for controlling well inner air tube, recharge valve and be arranged at and recharge passage flash, return and raise valve and be arranged at back and raise passage upper end；Recharge passage, return and raise passage and be all connected with well casing.
3. a kind of Quaternary system low pressure water as claimed in claim 1 protects spring inverted well, it is characterized in that: the fixing sealing layer arranged outside of described concrete has cement injection water barrier, extends to the junction of the fixing sealing layer of concrete and clay ball sealing layer；The fixing sealing layer of described concrete to wellhead component adopts rammer filling jarring closely knit, makes rammer layer fully fully bond with grouting cement.
4. a kind of Quaternary system low pressure water as claimed in claim 3 protects spring inverted well, it is characterized in that: described cement injection water barrier adopts two to open grouting process, and one opens 600mm becomes well cement slip casting, and two open 500mm becomes well.
5. a kind of Quaternary system low pressure water as claimed in claim 1 protects spring inverted well, it is characterized in that: described double medium filtration layer, filling out gravel bed including internal layer quartz sand and limestone rubble fills out gravel bed, internal layer quartz sand is filled out gravel bed and is wrapped in the outside of filter pipe, and limestone rubble is filled out gravel bed wrapping inner layer quartz sand and filled out gravel bed.
6. a kind of Quaternary system low pressure water as claimed in claim 5 protects spring inverted well, it is characterized in that: it is 2-4mm that described internal layer quartz sand fills out the ballast grain sizes of gravel bed；It is 5-20mm that limestone rubble fills out the ballast grain sizes of gravel bed；Described internal layer quartz sand fills out gravel bed and limestone rubble is filled out the layering of gravel bed and filled out gravel and utilize pvc pipe successively to insert.
7., suitable in a process for the inverted well as according to any one of claim 1-6, it is characterized in that: comprise the following steps:
(1) inverted well is followed successively by wellhead component, steel pipe, filter pipe and pump chamber from top to bottom, and wellhead component is that Hui Yang recharges integrated device；
(2) filling out gravel between filter pipe and water-bearing layer adopts layering to fill out gravel way, and internal layer adopts quartz sand, and outer layer adopts carbonate rubble；
(3) steel pipe arranged outside has double-deck sealing layer and two to open grouting process water barrier, upper strata sealing layer is the fixing sealing layer of concrete, lower floor's sealing layer is clay ball sealing layer, and top sealing layer to wellhead component adopts rammer filling jarring closely knit, makes rammer layer fully fully bond with grouting cement；
(4) immersible pump is set bottom well casing.
8. process as claimed in claim 7, is characterized in that: in described step (2), and layering is filled out gravel and utilized pvc pipe, caliber 400mm, successively inserts by calculating, increases back the cycle of raising；Double medium filtration layer is internal layer quartz sand, and particle diameter is 2-4mm, and filtration outer layer is carbonate rubble, and particle diameter is 5-20mm.
9. process as claimed in claim 7, is characterized in that: in described step (3), and two open grouting process water barrier is out that 600mm becomes well cement slip casting, and two open 500mm becomes well.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108036985B (en) * | 2017-12-27 | 2023-08-11 | 刘睿洋 | Device and method for manufacturing split grouting slurry vein and detecting permeability coefficient |
| CN109629586B (en) * | 2019-01-15 | 2024-02-06 | 上海长凯岩土工程有限公司 | Recharging well with water filtering structure |
| CN109879465B (en) * | 2019-03-29 | 2024-01-16 | 中国科学院武汉岩土力学研究所 | Underground filtering-precipitating device for loose sandstone thermal storage geothermal exploitation well |
| CN113279451A (en) * | 2021-06-21 | 2021-08-20 | 中国建筑第四工程局有限公司 | Full-automatic monitoring and recharging device next to underground deep foundation pit underground water level of subway |
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| CN202672169U (en) * | 2012-04-10 | 2013-01-16 | 上海广联建设发展有限公司 | Rainfall and recharging integrated device for foundation pit engineering |
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| CN204435349U (en) * | 2015-01-13 | 2015-07-01 | 济南轨道交通集团有限公司 | A kind of Quaternary system low pressure water protects spring recharge well |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3451382B2 (en) * | 1994-06-27 | 2003-09-29 | 東洋建設株式会社 | Underground water discharge method and drainage device |
| WO2002012637A1 (en) * | 2000-08-02 | 2002-02-14 | Nishimatsu Construction Co., Ltd. | Underground water pumping device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202672169U (en) * | 2012-04-10 | 2013-01-16 | 上海广联建设发展有限公司 | Rainfall and recharging integrated device for foundation pit engineering |
| CN103215937A (en) * | 2013-02-28 | 2013-07-24 | 中国地质大学（武汉） | Multilayer aquifer structure-based rainwater recharging underwater system |
| CN103741671A (en) * | 2014-01-22 | 2014-04-23 | 上海长凯岩土工程有限公司 | Groundwater recharge system structure for foundation pit dewatering |
| CN204435349U (en) * | 2015-01-13 | 2015-07-01 | 济南轨道交通集团有限公司 | A kind of Quaternary system low pressure water protects spring recharge well |
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