CN202936799U - Foundation pit dewatering bracing structure based on environment control purpose - Google Patents
Foundation pit dewatering bracing structure based on environment control purpose Download PDFInfo
- Publication number
- CN202936799U CN202936799U CN 201220616860 CN201220616860U CN202936799U CN 202936799 U CN202936799 U CN 202936799U CN 201220616860 CN201220616860 CN 201220616860 CN 201220616860 U CN201220616860 U CN 201220616860U CN 202936799 U CN202936799 U CN 202936799U
- Authority
- CN
- China
- Prior art keywords
- well
- foundation pit
- water
- recharge
- stop curtain
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The utility model relates to a foundation pit dewatering bracing structure based on an environment control purpose. The foundation pit dewatering bracing structure can alleviate land subsidence of peripheral land of a foundation pit caused by foundation pit excavation and foundation pit dewatering in a state with an ultra-thick confined aquifer, slow down the subsidence, reduce the subsidence size and inhibit peripheral land subsidence caused by foundation pit dewatering, is capable of greatly reducing the depth of an underground diaphragm wall functioning as a waterproof curtain, is energy-saving and environment-friendly, reduces underground obstructions and realizes sustainable development. The bracing structure comprises a waterproof curtain, a pressure reducing well and a recharge well, wherein the waterproof curtain is partially inserted into a confined aquifer to function as a foundation pit bracing, the pressure reducing well is arranged inside the waterproof curtain, the recharge well is arranged outside the waterproof curtain, confined water inside the pressure reducing well is communicated with confined water inside the recharge well, the pressure reducing well is arranged inside the foundation pit, the lower part of the pressure reducing well and the lower part of the recharge well are respectively provided with a filter, and the bottoms of the filters are higher than the bottom of the waterproof curtain.
Description
Technical field
The utility model relates to the base pit engineering technical field, specifically, relates to a kind of foundation pit dewatering space enclosing structure based on ring control target.
Background technology
Base pit engineering is for excavating the earthwork at engineering underground structure place, guarantees foundation ditch and safety of surrounding environment and the general name of the engineering measures such as going along with sb. to guard him of taking, support, precipitation, reinforcing, shoveling and backfill.Groundwater control is for Foundation Pit Construction and reduces draining, precipitation, the sealing that impact is taked on surrounding enviroment or the measure such as recharge.Foundation pit dewatering is at the inside and outside well casing of burying underground of foundation ditch, utilizes plant equipment to draw water, the engineering means that groundwater level is reduced.Foundation depth was more shallow in the past, excavation of foundation pit adopts the slope mode of putting, increase along with the excavation of foundation pit degree of depth, water-stop curtain and groundwater recharge structure can not be ignored the effect of foundation ditch peripheral distortion reducing excavation of foundation pit and foundation pit dewatering, and especially in foundation ditch being had to the huge thick aquifer of artesian water of destruction, water-stop curtain and groundwater recharge structure applications effect are remarkable.
Control the foundation pit dewatering design of target based on environment and at first select dewatering mode in hole; the dewatering well strainer should be embedded in the water-stop curtain bottom with within shallow 5.00m; recharging the engineering suitability is: the huge thick artesian aquifer that affects the foundation ditch safety and stability is not cut off by water-stop curtain; one-level foundation ditch first class of protection, meet regional land subsidence and control requirement.Arranging of water-stop curtain and recharge well is mainly to lengthen the seepage flow approach of underground water to foundation ditch harm, the strengthening fender body is controlled the measure of decline of groundwater level amplitude outward, Main Function is to reduce the surface settlement that fender body outside environment causes due to excavation of foundation pit and precipitation, slow down the time that sedimentation occurs, reduce the size that sedimentation occurs, suppress the surrounding ground sedimentation that foundation pit dewatering causes.Water-stop curtain is relevant with the seepage flow characteristics of underground water on the impact of sedimentation with groundwater recharge, according to the underground water seepage flow characteristics, consider cost performance and execution conditions, when space enclosing structure can not be blocked artesian aquifer, water-stop curtain and recharge the following pattern of pattern optimum selection: under foundation ditch, artesian aquifer is partially enclosed by water-stop curtain, precipitation well in foundation pit strainer buried depth is no more than the water-stop curtain degree of depth, the outer artesian water recharge well strainer buried depth of foundation ditch is no more than the water-stop curtain degree of depth, the underground water that in foundation ditch, pumped well is extracted out not ingress of air accesses recharge well as recharging water source under reducing condition, precipitation is synchronizeed with recharging.Recharge well regularly returns and raises maintenance.
The utility model content
The purpose of this utility model is to provide a kind of surface settlement foundation ditch peripheral ground caused because of excavation of foundation pit and foundation pit dewatering that can reduce under huge thick artesian aquifer state, slow down time and size that sedimentation occurs, and suppress the foundation pit dewatering space enclosing structure of the surrounding ground sedimentation that foundation pit dewatering causes, use this structure can greatly save the degree of depth of water-stop curtain diaphragm wall, energy-conserving and environment-protective, reduce underground obstacle and realize sustainable development.
The purpose of this utility model is achieved in that
A kind of foundation pit dewatering space enclosing structure based on ring control target, comprise water-stop curtain, pressure reduction well and recharge well, described water-stop curtain partly inserts in artesian aquifer as bracing of foundation pit, inside at described water-stop curtain is provided with pressure reduction well, outside is provided with recharge well, and the artesian water in described pressure reduction well and recharge well is communicated with, and described pressure reduction well is located at foundation ditch inside, the bottom of described pressure reduction well and recharge well is respectively equipped with strainer, and the bottom of described strainer is shallower than the bottom of described water-stop curtain.
Further, the spacing between described water-stop curtain and recharge well is not less than 6 meters; The bottom of described strainer is not less than 5 meters than the difference in height between the bottom of water-stop curtain.
Wherein, described water-stop curtain is diaphragm wall or three axle agitation piles.
The utility model is owing to having adopted technique scheme, compare with conventional art and have following beneficial effect: the utility model space enclosing structure is placed in artesian aquifer, by by water-stop curtain partial insertion artesian aquifer, foundation ditch is partially enclosed by water-stop curtain, precipitation well in foundation pit strainer buried depth is no more than the water-stop curtain degree of depth, the outer artesian water recharge well strainer buried depth of foundation ditch is no more than the water-stop curtain degree of depth, the underground water that in foundation ditch, pumped well is extracted out not ingress of air accesses recharge well as recharging water source under reducing condition, precipitation is synchronizeed with recharging, recharge well regularly returns and raises maintenance.Formed artificial effective water proof border in aquifer, significant to underground engineering structures and the harmonious symbiosis of underground water geological environment, promote the sustainable development of underground space development.
The accompanying drawing explanation
By following embodiments of the invention description taken together with the accompanying drawings, other advantage of the present invention and feature are shown, this embodiment provides with the form of example, but is not limited to this, wherein:
The structural representation that Fig. 1 is a kind of foundation pit dewatering space enclosing structure based on ring control target of the utility model.
The specific embodiment
The foundation pit dewatering space enclosing structure based on ring control target as shown in Figure 1, comprise water-stop curtain 3, pressure reduction well 1 and recharge well 2, and water curtain 3 is diaphragm wall or three axle agitation piles.Water-stop curtain 3 partly inserts in artesian aquifer 4 as bracing of foundation pit, be provided with pressure reduction well 1 in the inside of water-stop curtain 3, outside is provided with recharge well 2, artesian water in pressure reduction well 1 and recharge well 2 is communicated with, pressure reduction well 1 is located at foundation ditch inside, the bottom of pressure reduction well 1 and recharge well 2 is respectively equipped with strainer, and the bottom of the strainer of pressure reduction well 1 and recharge well 2 all is shallower than the bottom of water-stop curtain 3.
Wherein, the spacing between water-stop curtain 3 and recharge well 2 is not less than 6 meters; The bottom of the strainer of pressure reduction well 1 is not less than 5 meters than the difference in height between the bottom of water-stop curtain 3.
During work, pressure reduction well 1 requires " step-down as required; dynamically step-down ", have to dash forward to gush through 5 pairs of foundation ditch bottom surfaces 7 of aquitard to artesian water and do the used time during the corresponding excavation of foundation pit degree of depth when pressure water head 6 is high, start to open pressure reduction well 1, the underground water that in foundation ditch, pumped well 1 is extracted out not ingress of air accesses recharge well 2 as recharging water source in water pipe under reducing condition, the underground water that the unnecessary pressure reduction well 1 of part is extracted out enters municipal pipeline after three grades of precipitations.Recharge well 2 recharges with pressure reduction well 1 and draws water and synchronize, precipitation, recharge that synchronous adjustment is drawn water, recharge well number and pump-out, the amount of recharging draw water as required and recharge as required, recharge well 2 regularly returns and raises maintenance.Until dell 8 excavations, maintaining underground water under different excavation bottom surface 7 situations is having the seepage flow dynamic equilibrium under water-stop curtain 3 effects.Similarly, after dell 8 base plates water, lift on underground pressure water head 6 in pressure reduction well 1 and recharge well 2, maintain the seepage action of ground water dynamic equilibrium under water-stop curtain 3 effects, guarantee that pressure water head 6 has prominent gushing lower than artesian water through 5 pairs of foundation ditch bottom surfaces 7 of aquitard and makes used time pressure water head 6.Until pressure reduction well 1 and recharge well 2 work finish simultaneously.
Claims (4)
1. the foundation pit dewatering space enclosing structure based on ring control target, comprise water-stop curtain, pressure reduction well and recharge well, it is characterized in that: described water-stop curtain partly inserts in artesian aquifer as bracing of foundation pit, inside at described water-stop curtain is provided with pressure reduction well, outside is provided with recharge well, artesian water in described pressure reduction well and recharge well is communicated with, described pressure reduction well is located at foundation ditch inside, the bottom of described pressure reduction well and recharge well is respectively equipped with strainer, and the bottom of described strainer is shallower than the bottom of described water-stop curtain.
2. space enclosing structure as claimed in claim 1, it is characterized in that: the spacing between described water-stop curtain and recharge well is not less than 6 meters.
3. space enclosing structure as claimed in claim 1, it is characterized in that: the bottom of described strainer is not less than 5 meters than the difference in height between the bottom of water-stop curtain.
4. space enclosing structure as claimed in claim 1, it is characterized in that: described water-stop curtain is diaphragm wall or three axle agitation piles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220616860 CN202936799U (en) | 2012-11-20 | 2012-11-20 | Foundation pit dewatering bracing structure based on environment control purpose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220616860 CN202936799U (en) | 2012-11-20 | 2012-11-20 | Foundation pit dewatering bracing structure based on environment control purpose |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202936799U true CN202936799U (en) | 2013-05-15 |
Family
ID=48321045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220616860 Expired - Lifetime CN202936799U (en) | 2012-11-20 | 2012-11-20 | Foundation pit dewatering bracing structure based on environment control purpose |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202936799U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510501A (en) * | 2013-10-23 | 2014-01-15 | 天津大学 | Method for preventing blocking and water gushing in recharge well |
| 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 |
| CN104831751A (en) * | 2015-04-15 | 2015-08-12 | 中国建筑第八工程局有限公司 | Base plate layered pouring method for reducing gushing risk confined water under high confined water head |
| CN104831742A (en) * | 2015-04-15 | 2015-08-12 | 中国建筑第八工程局有限公司 | Foundation pit dewatering method with two adjacent micro confined aquifers not separated by water-proof layer |
| CN105155564A (en) * | 2015-08-07 | 2015-12-16 | 中建三局第二建设工程有限责任公司 | Anti-inrushing construction method for weak water-resisting layer of deep foundation pit |
| CN105525633A (en) * | 2015-11-25 | 2016-04-27 | 同济大学 | Pumping-irrigating self-circulation control system for floating resistance of basement |
| CN106193076A (en) * | 2016-08-10 | 2016-12-07 | 上海广联环境岩土工程股份有限公司 | Deep basal pit is combined the Groundwater Control method of water-bearing structure |
| CN107245994A (en) * | 2017-06-27 | 2017-10-13 | 中铁第四勘察设计院集团有限公司 | It is a kind of based on pre-judging method of the deep foundation pit precipitation to high ferro roadbed safety effects |
| CN108661064A (en) * | 2018-05-28 | 2018-10-16 | 郑林 | A kind of local curtain water stop method in foundation pit |
| CN115305901A (en) * | 2022-08-16 | 2022-11-08 | 中交第四公路工程局有限公司 | Directional recharge and emergency pumping well |
-
2012
- 2012-11-20 CN CN 201220616860 patent/CN202936799U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510501A (en) * | 2013-10-23 | 2014-01-15 | 天津大学 | Method for preventing blocking and water gushing in recharge well |
| CN103510501B (en) * | 2013-10-23 | 2015-04-29 | 天津大学 | Method for preventing blocking and water gushing in recharge well |
| 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 |
| CN104831751A (en) * | 2015-04-15 | 2015-08-12 | 中国建筑第八工程局有限公司 | Base plate layered pouring method for reducing gushing risk confined water under high confined water head |
| CN104831742A (en) * | 2015-04-15 | 2015-08-12 | 中国建筑第八工程局有限公司 | Foundation pit dewatering method with two adjacent micro confined aquifers not separated by water-proof layer |
| CN105155564A (en) * | 2015-08-07 | 2015-12-16 | 中建三局第二建设工程有限责任公司 | Anti-inrushing construction method for weak water-resisting layer of deep foundation pit |
| CN105525633A (en) * | 2015-11-25 | 2016-04-27 | 同济大学 | Pumping-irrigating self-circulation control system for floating resistance of basement |
| CN106193076A (en) * | 2016-08-10 | 2016-12-07 | 上海广联环境岩土工程股份有限公司 | Deep basal pit is combined the Groundwater Control method of water-bearing structure |
| CN107245994A (en) * | 2017-06-27 | 2017-10-13 | 中铁第四勘察设计院集团有限公司 | It is a kind of based on pre-judging method of the deep foundation pit precipitation to high ferro roadbed safety effects |
| CN107245994B (en) * | 2017-06-27 | 2019-07-09 | 中铁第四勘察设计院集团有限公司 | It is a kind of based on deep foundation pit precipitation to the pre-judging method of high-speed rail roadbed safety effects |
| CN108661064A (en) * | 2018-05-28 | 2018-10-16 | 郑林 | A kind of local curtain water stop method in foundation pit |
| CN115305901A (en) * | 2022-08-16 | 2022-11-08 | 中交第四公路工程局有限公司 | Directional recharge and emergency pumping well |
| CN115305901B (en) * | 2022-08-16 | 2024-05-28 | 中交第四公路工程局有限公司 | Directional recharging and emergency pumping well |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202936799U (en) | Foundation pit dewatering bracing structure based on environment control purpose | |
| CN103741671A (en) | Groundwater recharge system structure for foundation pit dewatering | |
| CN106049532B (en) | A kind of pipe gallery open-cut branch blocking means and its construction method | |
| CN104805854A (en) | Method for constructing deep-water ultra-long steel plate pile cofferdam in tide environment | |
| CN205063005U (en) | Can carry out novel rainwater well that compensates to groundwater | |
| CN107119691A (en) | One kind is applied to the square deep basal pit of the high pressure-bearing of rich water sand gravel layer and its excavation method | |
| CN103225306B (en) | Method of preventing foundation pit leakage during excavation of foundation pit close to water source | |
| CN104404974A (en) | High-pressure-bearing water and thick sand and pebble formation deep foundation pit grouting bottom-sealing structure and construction technology thereof | |
| CN102926392A (en) | Foundation pit dewatering system and construction method thereof | |
| CN203238649U (en) | Combined type waterproof curtain | |
| CN202202335U (en) | Flow guiding and water draining structure in deep foundation pit | |
| CN203939036U (en) | A kind of steel sheet pile cofferdam structure that is applicable to river course | |
| CN102787606B (en) | Guard method to surrounding environment in a kind of excavation of foundation pit Precipitation Process | |
| CN104074234B (en) | The interior river intake structure of electric power plant circulating water system and construction method thereof | |
| CN205035821U (en) | Combined type gravity retaining wall | |
| CN203684243U (en) | Twin-well combined recharge type settlement control system | |
| CN204098050U (en) | A kind of control artesian water precipitation system | |
| CN204418195U (en) | There is sealing and the open caisson subtracting heavy function | |
| CN204510351U (en) | A kind of recharge well structure | |
| CN204252148U (en) | High artesian thick sand-pebble layer deep foundation ditch slip casting back cover structure | |
| CN202881962U (en) | Foundation pit dewatering structure | |
| CN103790150B (en) | Settlement control method based on twin-well combined type recharge | |
| CN103866779B (en) | A kind of construction method of sealing space enclosing structure of soft foundation building foundation pit | |
| CN202370539U (en) | Front tunnel face excavated soil pre-reinforcing structure of tunnel | |
| CN102787611A (en) | Precipitation method for excavation of foundation pit at collapsible loess region |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130515 |