CN102787606B - Guard method to surrounding environment in a kind of excavation of foundation pit Precipitation Process - Google Patents
Guard method to surrounding environment in a kind of excavation of foundation pit Precipitation Process Download PDFInfo
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- CN102787606B CN102787606B CN201210282856.3A CN201210282856A CN102787606B CN 102787606 B CN102787606 B CN 102787606B CN 201210282856 A CN201210282856 A CN 201210282856A CN 102787606 B CN102787606 B CN 102787606B
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Abstract
The invention discloses the guard method to surrounding environment in the excavation of foundation pit Precipitation Process of a kind of Collapsible Loess District, specifically comprise: after foundation ditch (9) space enclosing structure (8) construction, at aquifer (3) construction suspension type water-stop curtain (6), its top is higher than groundwater table, but do not penetrate aquifer (3), rear Dewatering well (10), simultaneously, between foundation ditch (9) and surrounding building (5), recharge well (6) is set, recharge well (6) penetrates yellow soil horizon of collapsibility (2), but do not penetrate aquifer (3), recharge well (6) at soil layer (2) to divide into treatment hole.In Excavation Process, use dewatering well (10) that water level is down to design elevation, utilize recharge well (6) to recharge simultaneously, keep its water level lower than soil layer (2).Technical scheme provided by the invention can meet the precipitation needs of Collapsible Loess District excavation of foundation pit, can protect again the safety of buildings around foundation pit, saving water resource and reduce costs.
Description
Technical field
The present invention relates to geotechnical engineering excavation of foundation pit environmental protection technical field; be specially the guard method to surrounding environment in the excavation of foundation pit Precipitation Process of a kind of Collapsible Loess District; the technical scheme that the method provides can meet the precipitation needs of Collapsible Loess District excavation of foundation pit; the foundation ditch surrounding soil sedimentation that recharge water can prevent precipitation from causing is excessive; can prevent that recharge water is excessive causes settlement by soaking soil layer generation saturated yielding simultaneously; the safety of good protection buildings around foundation pit, effective saving water resource and reduction engineering cost.
Background technology
The foundation pit dewatering mode that excavation of foundation pit adopts mainly comprises: 1. arrange water-stop curtain within the scope of foundation depth, draw water outside hole, adopt precipitation in this way, the scope that arranges of water-stop curtain strengthens, and construction quality requires higher, and engineering cost is corresponding increase also, water resource waste is serious, meanwhile, the surface settlement caused owing to drawing water is general comparatively large, brings serious threat to the safety of surrounding building; 2. by water-stop curtain from ground to impervious stratum, precipitation is carried out in hole, adopt precipitation in this way, water-stop curtain construction quality requires high, can not occur hole, be difficult in work progress control, once there is permeable phenomenon, be just difficult to shutoff, the water extracted out is all drained, cause water resource serious waste, construction costs is higher.Although above-mentioned two kinds of methods can meet the precipitation requirement of foundation pit construction, higher to construction requirement, engineering cost is excessive, and water resource waste is serious, can not provide safeguard to the safety of surrounding building.For above technical problem, engineering adopts more method to be arrange water-stop curtain within the scope of foundation depth, arranges recharge well simultaneously, carry out moisturizing to place surrounding aqueous soil layer around foundation ditch.But in Collapsible Loess District, recharge well directly carries out moisturizing and easily causes place collapsible loess soil layer generation saturated yielding, and soil layer destroys, and very easily causes engineering accident.
Summary of the invention
The defect existed for prior art or deficiency; the object of the invention is to; guard method to surrounding environment in the excavation of foundation pit Precipitation Process of a kind of Collapsible Loess District is provided; the technical scheme that the method provides can meet the precipitation needs of Collapsible Loess District excavation of foundation pit; the foundation ditch surrounding soil sedimentation that recharge water can prevent precipitation from causing is excessive; can prevent that recharge water is excessive causes settlement by soaking soil layer generation saturated yielding simultaneously; the safety of good protection buildings around foundation pit, effective saving water resource and reduction engineering cost.In order to realize above-mentioned technical assignment, the present invention adopts following technical solution:
In Excavation Process, adopt dewatering well while the inner precipitation of foundation ditch, use recharge well to recharge between building and foundation ditch.Foundation ditch adopts suspension type water-stop curtain, and it is interval that suspension type water-stop curtain is arranged at place aquifer, and its top is higher than groundwater table, and below the excavation of foundation pit degree of depth is stretched in bottom, and does not stretch into impervious stratum.Recharge well penetrates collapsible loess soil layer, and in collapsible loess soil layer and upper overburden layer thereof, recharge well filter pipe does not arrange treatment hole, and recharge well elevation of bottom is not less than the elevation of bottom of suspension type water-stop curtain.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention;
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Detailed description of the invention
Referring to Figure of description and embodiment, the present invention is described in detail.
As shown in Figure 1, before foundation ditch 9 excavates, first construction foundation pit space enclosing structure 8, then at place aquifer 3 interval construction suspension type water-stop curtain 7, its top is higher than groundwater table, and below the excavation of foundation pit degree of depth is stretched in bottom, and does not stretch into impervious stratum 4.Last Dewatering well 10 and recharge well 6, dewatering well gos deep into foundation ditch bottom design absolute altitude, but do not penetrate aquifer 3, recharge well penetrates collapsible loess soil layer 2, collapsible loess soil layer 2 and in overburden layer 1 scope recharge well treatment hole is not set, only within the scope of aquifer, arrange recharge well treatment hole, recharge well elevation of bottom is not less than the elevation of bottom of suspension type water-stop curtain.In Excavation Process, adopt dewatering well while the inner precipitation of foundation ditch, use recharge well to recharge between building 5 and foundation ditch 9.
Here is described principle of the present invention:
At place aquifer interval construction suspension type water-stop curtain, top is higher than phreatic line, and below the excavation of foundation pit degree of depth is stretched in bottom, and does not stretch into impervious stratum, reduces engineering quantity to greatest extent, cost-saving; Dewatering well gos deep into but does not penetrate aquifer, while the precipitation meeting foundation pit construction requires, reduces engineering cost; Collapsible loess soil layer and within the scope of overburden layer recharge well treatment hole is not set, only recharge well treatment hole is set within the scope of aquifer, recharge well water level is monitored in water-pouring process, in maintenance recharge well, height of water level is lower than collapsible loess soil layer, both avoided because of underground aquifer hydraulic pressure that to reduce the surface settlement caused excessive, guarantee that again collapsible loess soil layer can not soak generation saturated yielding, ensure that the safety of buildings around foundation pit in work progress; Recharge well elevation of bottom is not less than the elevation of bottom of suspension type water-stop curtain, avoids dewatering well to be communicated with at same absolute altitude with recharge well, ensure that the dewatering effect of foundation ditch; In Precipitation Process, while adopting dewatering well precipitation, between buildings around foundation pit and foundation ditch, adopt recharge well to carry out groundwater recharge, avoid the surface settlement caused because of groundwater overdraft excessive, ensure that the safety of building, saved water resource simultaneously.
Claims (2)
1. the guard method to surrounding environment in an excavation of foundation pit Precipitation Process, it is characterized in that: in foundation ditch (9) digging process, adopt dewatering well (10) while the inner precipitation of foundation ditch, use recharge well (6) to recharge between building (5) and foundation ditch (9); Foundation ditch (9) adopts suspension type water-stop curtain (7), it is interval that suspension type water-stop curtain (7) is arranged at place aquifer (3), its top is higher than groundwater table, below foundation ditch (9) cutting depth is stretched in bottom, and does not stretch into impervious stratum (4); Recharge well (6) penetrates collapsible loess soil layer (2), recharge well (6) in collapsible loess soil layer (2) and upper overburden layer (1) thereof does not arrange treatment hole, only in aquifer (3) scope, arrange treatment hole, recharge well (6) elevation of bottom is higher than the elevation of bottom of suspension type water-stop curtain (7).
2. the guard method to surrounding environment in a kind of excavation of foundation pit Precipitation Process as claimed in claim 1; it is characterized in that: recharge in process; monitoring recharge well (6) water level, keeps recharge well (6) water level lower than top collapsible loess soil layer (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210282856.3A CN102787606B (en) | 2012-08-10 | 2012-08-10 | Guard method to surrounding environment in a kind of excavation of foundation pit Precipitation Process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210282856.3A CN102787606B (en) | 2012-08-10 | 2012-08-10 | Guard method to surrounding environment in a kind of excavation of foundation pit Precipitation Process |
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| Publication Number | Publication Date |
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| CN102787606A CN102787606A (en) | 2012-11-21 |
| CN102787606B true CN102787606B (en) | 2015-08-26 |
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| CN201210282856.3A Active CN102787606B (en) | 2012-08-10 | 2012-08-10 | Guard method to surrounding environment in a kind of excavation of foundation pit Precipitation Process |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225306B (en) * | 2013-03-26 | 2015-02-25 | 西安建筑科技大学 | Method of preventing foundation pit leakage during excavation of foundation pit close to water source |
| CN103526780B (en) * | 2013-10-23 | 2015-06-24 | 天津大学 | Water plugging seepage-proofing method for recharge well |
| CN112229981A (en) * | 2020-10-30 | 2021-01-15 | 东南大学 | Device for simulating comprehensive influence of foundation pit excavation and multi-gradient precipitation on tunnel |
| CN113186961A (en) * | 2021-04-29 | 2021-07-30 | 中国一冶集团有限公司 | Foundation pit drainage method capable of reducing influence on surrounding buildings |
| CN114486683B (en) * | 2022-02-16 | 2023-07-21 | 上海工程技术大学 | Test device for simulating pumping water in foundation pit and recharging groundwater outside foundation pit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005002659A (en) * | 2003-06-11 | 2005-01-06 | East Japan Railway Co | Groundwater circulation system in excavation of ground, and construction method for measure against groundwater in excavation of ground |
| CN101736732A (en) * | 2009-12-17 | 2010-06-16 | 上海隧道工程股份有限公司 | Pressure and water reduction construction method of ultra-deep foundation pit confined water |
| CN102505677A (en) * | 2011-09-29 | 2012-06-20 | 上海隧道工程股份有限公司 | Method for controlling sedimentation through recharging engineering groundwater |
-
2012
- 2012-08-10 CN CN201210282856.3A patent/CN102787606B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005002659A (en) * | 2003-06-11 | 2005-01-06 | East Japan Railway Co | Groundwater circulation system in excavation of ground, and construction method for measure against groundwater in excavation of ground |
| CN101736732A (en) * | 2009-12-17 | 2010-06-16 | 上海隧道工程股份有限公司 | Pressure and water reduction construction method of ultra-deep foundation pit confined water |
| CN102505677A (en) * | 2011-09-29 | 2012-06-20 | 上海隧道工程股份有限公司 | Method for controlling sedimentation through recharging engineering groundwater |
Non-Patent Citations (4)
| Title |
|---|
| 张伟等.建筑施工技术.《建筑施工技术》.同济大学出版社,2010,第36页倒数第2段. * |
| 湿陷性黄土地区深大基坑施工技术;吴建军等;《建筑施工》;20051228(第12期);第10-11、14页 * |
| 立丰国际购物广场基坑降水方案的设计与施工;郭小云等;《施工技术》;20051231;第44-46页 * |
| 黄土地区地铁车站深基坑降水设计与施工;柳利丽;《建筑技术》;20120131;第43卷(第1期);第5-57页 * |
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| CN102787606A (en) | 2012-11-21 |
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