CN202881962U - Foundation pit dewatering structure - Google Patents
Foundation pit dewatering structure Download PDFInfo
- Publication number
- CN202881962U CN202881962U CN 201220526375 CN201220526375U CN202881962U CN 202881962 U CN202881962 U CN 202881962U CN 201220526375 CN201220526375 CN 201220526375 CN 201220526375 U CN201220526375 U CN 201220526375U CN 202881962 U CN202881962 U CN 202881962U
- Authority
- CN
- China
- Prior art keywords
- foundation pit
- pit dewatering
- dewatering structure
- well
- foundation
- 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 - Fee Related
Links
Images
Abstract
The utility model discloses a foundation pit dewatering structure which comprises a foundation pit and four waterproof curtains arranged on four side walls of the foundation pit. Recharge wells are arranged on the outer sides of the waterproof curtains. A pumping well is arranged in the foundation pit. A clay layer and a cement soil layer are arranged on the bottom portion of the foundation pit. The foundation pit dewatering structure has the advantages that foundation pit dewatering is safe and reliable, the problems of foundation pit water burst, quicksand and overlarge ground surface settlement and the like are avoided, and the foundation pit dewatering structure is suitable for foundation pit dewatering of a foundation pit with high underground water level and is especially suitable for foundation pit dewatering of high-rise buildings with sensitive settlement and important cultural relic buildings.
Description
Technical field
The utility model relates to a kind of foundation pit dewatering structure, and it is applicable to the higher foundation pit dewatering project of groundwater table, and being particularly useful for has pair highrise building of ground settlement sensitivity or the dewatering project of important landmark thing around the foundation ditch.
Background technology
Foundation pit dewatering can make the work planes such as excavation of foundation pit, supporting be in dry state, and has the many merits such as the Foundation Pit of avoiding ground swell water and reduction foundation pit side-wall water pressure.But, because foundation pit dewatering is subjected to many factors, so the design of its scheme and construction all have very large difficulty and uncertainty.
Present foundation pit dewatering, many employings are around foundation ditch or expire the scheme that the hole is evenly arranged pumped well, do not form the complete structure of a cover, and therefore, the impact of factors often causes the generation of following situation:
(1) because precipitation scheme is improper, cause foundation ditch that large-scale water burst, drift sand occur;
(2) because the excessive sedimentation of above ground structure, cause foundation ditch to be destroyed, especially concerning the highrise building of sedimentation sensitivity and important landmark, its destruction situation is more serious.
The utility model content
Problem to be solved in the utility model overcomes the defective of aforementioned prior art exactly, and a kind of foundation pit dewatering structure and job practices thereof that has more beneficial effect than prior art is provided for this reason.
Foundation pit dewatering structure of the present utility model, comprise foundation ditch and be arranged on the described foundation ditch water-stop curtain of side-walls all around, the arranged outside of described water-stop curtain has recharge well, is provided with pumped well in the described foundation ditch, and the bottom of described foundation ditch is provided with argillic horizon and cement soil layer.
Described recharge well is along the single layout of length of described water-stop curtain, and its well diameter is 150-200mm, and wellbore depth is 12-14m.
The thickness of described water-stop curtain is 1.2-1.5m, and it highly is 15-18m, and the centre distance of itself and described recharge well is 0.8-1.2m.
Pumped well in the described foundation ditch is arranged take per four wellholes as one group of state of assuming diamond in shape or is arranged as one group of state triangular in shape take per three wellholes, and its well diameter is 200-300mm, and wellbore depth is 15-20m.
When described pumped well take per four wellholes as one group when assuming diamond in shape state arrangement, the wellhole spacing on the long limit of its rhombus is 7-8m, the wellhole spacing of rhombus minor face is 6-7m.
Described argillic horizon and cement the thickness of the layer are 10cm.
Described cement soil layer can be with cement mortar or coal ash instead.
The beneficial effects of the utility model are:
(1) can make foundation pit dewatering have more safe and reliable certainty,
(2) avoid making the appearance of the problems such as the outer earth's surface sedimentation of water burst, drift sand and foundation ditch of foundation ditch failure is excessive;
(3) be suitable for the higher foundation pit dewatering of groundwater table, be particularly suitable for the highrise building of sedimentation sensitivity and the foundation pit dewatering of important landmark;
(4) described pumped well is arranged take per four wellholes as one group of state of assuming diamond in shape in foundation ditch or take per three set-up modes that wellhole is arranged as one group of state triangular in shape, more save space than prior art along the mode that foundation ditch is evenly arranged on every side, thereby make things convenient for the construction of the interior ground works of foundation ditch and support engineering.
Description of drawings
Fig. 1 is the sectional drawing of the utility model foundation pit dewatering structure; Fig. 2 is the top view of Fig. 1.
The specific embodiment
The utility model is easier to be understood in order to make, and below in conjunction with drawings and Examples the technical solution of the utility model is described in detail.
Fig. 1, Fig. 2 have illustrated structure of the present utility model with sectional drawing and top view respectively.
With reference to Fig. 1, Fig. 2, foundation pit dewatering structure of the present utility model, comprise the foundation ditch 1 that excavation is good, also comprise and be separately positioned on described foundation ditch 1 water-stop curtain 2 at sidewall 5 places all around, the single recharge well 4 that arranges in the outside of described water-stop curtain 2, be provided with several pumped wells 3 in the described foundation ditch 1, the bottom of described foundation ditch 1 is provided with cement soil layer 7 and argillic horizon 6.
The effect of described recharge well 4, in the soil layer in described sidewall 5 outsides, to carry out the waterpower supply, the underground water that stops simultaneously or reduce under the above ground structure flows to the precipitation area, original groundwater table is remained unchanged and keep original stress state in the soil, thereby reduce the settling amount on described foundation ditch 1 outer ground, reduce foundation pit dewatering to the impact of adjacent structure.Described recharge well 4 can be arranged by certain quantity according to the possible sedimentation degree on described foundation ditch 1 outer ground, and the recharge well 4 that is arranged in respectively described water-stop curtain 2 outsides in the illustrated embodiment is 5.
The effect of described water-stop curtain 2 is to prevent that the water seepage flow of described sidewall 5 is to the inside of foundation ditch 1.Generally speaking with its as shown embodiment be arranged on like that around the described foundation ditch 1.
The effect of described pumped well 3 is that the water in the described foundation ditch 1 is in time extracted out, so that the inside of foundation ditch 1 keeps dry, thereby makes things convenient for the construction of soil excavation and supporting and protection structure.Several described pumped wells 3 as shown embodiment are arranged take per four wellholes as one group of state of assuming diamond in shape like that, also can arrange take per three wellholes as one group of state triangular in shape.When it was arranged take per four wellholes as one group of state of assuming diamond in shape, described pumped well 3 was 7-8m in the wellhole spacing on the long limit of rhombus, and the wellhole spacing of rhombus minor face is 6-7m.
The effect of described argillic horizon 6 and cement soil layer 7 is to utilize the little characteristic of self transmission coefficient, stops underground water to penetrate in the described foundation ditch 1 from the bottom of described foundation ditch 1, to avoid the generation of the breakoff phenomenons such as water burst or drift sand.In order to adapt to various working, described cement soil layer 7 also can be with cement mortar or coal ash instead.
Job practices of the present utility model comprises steps such as " excavation pits, lay argillic horizon and cement soil layer, determine the position, well point and carry out hole drilling, water-stop curtain construction, draw water and recharge in recharge well ".It should be noted that: described foundation ditch 1 digs 20cm under will continuing when excavating to prescribed depth, then its bottom respectively laying depth be argillic horizon 6 and the cement soil layer 7 of 10cm, cement consumption is strengthened at the position that requires described cement soil layer 7 to contact with described water-stop curtain 2, that is: described cement soil layer 7 this position cement with soil ratio be 1:2, other position cement with soil ratio be 1:10; In addition, the water in the described pumped well 3 is extracted out by water pump and when recharging in the described recharge well 4, the water yield of individual well can be determined according to the rich regimen condition on its stratum, place, be generally 6-12m
3/ h, and require in pump process, to observe at any time drawdown in water yield and the described pumped well 3, and adjust accordingly the size of pump-out, until finish construction.
Above reference and embodiment schematically describe foundation pit dewatering structure of the present utility model, and this description does not have restricted.Those of ordinary skill in the art will be understood that in actual applications structure setting of the present utility model and job practices all some change may occur, and other staff also may make similar Design under its enlightenment.Only it is pointed out that otherwise break away from design aim of the present utility model that all apparent change and similar Design thereof all are included within the protection domain of the present utility model.
Claims (7)
1. foundation pit dewatering structure, comprise foundation ditch, it is characterized in that, side-walls around the described foundation ditch is provided with water-stop curtain, the arranged outside of described water-stop curtain has the recharge well along the single layout of length of this water-stop curtain, be provided with in the described foundation ditch and arrange take per four wellholes as one group of state of assuming diamond in shape or take per three pumped wells that wellhole is arranged as one group of state triangular in shape, the bottom of described foundation ditch is provided with argillic horizon and cement soil layer.
2. foundation pit dewatering structure according to claim 1 is characterized in that, the well diameter of described recharge well is 150-200mm, and wellbore depth is 12-14m.
3. foundation pit dewatering structure according to claim 1 is characterized in that, the thickness of described water-stop curtain is 1.2-1.5m, and it highly is 15-18m, and the centre distance of itself and described recharge well is 0.8-1.2m.
4. foundation pit dewatering structure according to claim 1 is characterized in that, the well diameter of described pumped well is 200-300mm, and wellbore depth is 15-20m.
5. foundation pit dewatering structure according to claim 4 is characterized in that, when described pumped well take per four wellholes as one group when assuming diamond in shape state arrangement, the wellhole spacing on the long limit of its rhombus is 7-8m, the wellhole spacing of rhombus minor face is 6-7m.
6. foundation pit dewatering structure according to claim 1 is characterized in that, described argillic horizon and cement the thickness of the layer are 10cm.
7. foundation pit dewatering structure according to claim 1 is characterized in that, described cement soil layer can be cement mortar or flyash.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220526375 CN202881962U (en) | 2012-10-15 | 2012-10-15 | Foundation pit dewatering structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220526375 CN202881962U (en) | 2012-10-15 | 2012-10-15 | Foundation pit dewatering structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202881962U true CN202881962U (en) | 2013-04-17 |
Family
ID=48073403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220526375 Expired - Fee Related CN202881962U (en) | 2012-10-15 | 2012-10-15 | Foundation pit dewatering structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202881962U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306297A (en) * | 2013-06-17 | 2013-09-18 | 中冶天工上海十三冶建设有限公司 | Excavation and load reduction method of foundation pit |
| 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 |
| CN111411639A (en) * | 2020-04-24 | 2020-07-14 | 中建七局第一建筑有限公司 | Shallow foundation pit dewatering construction method for water-rich pebble layer |
-
2012
- 2012-10-15 CN CN 201220526375 patent/CN202881962U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306297A (en) * | 2013-06-17 | 2013-09-18 | 中冶天工上海十三冶建设有限公司 | Excavation and load reduction method of foundation pit |
| CN103306297B (en) * | 2013-06-17 | 2016-03-30 | 中冶天工上海十三冶建设有限公司 | Excavation of foundation pit load reducing measure |
| 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 |
| CN111411639A (en) * | 2020-04-24 | 2020-07-14 | 中建七局第一建筑有限公司 | Shallow foundation pit dewatering construction method for water-rich pebble layer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102926392A (en) | Foundation pit dewatering system and construction method thereof | |
| CN110242301A (en) | A kind of modified water-protection coal-mining method of two step slip casting of top plate water-bearing layer | |
| CN104674827A (en) | Novel totally-closed water stopping system for water-rich stratum foundation pit and construction method of novel totally-closed water stopping system | |
| CN102051886A (en) | Light well point drainage construction technology | |
| CN104631438B (en) | Long auger guncreting uplift pile construction method | |
| CN108843343B (en) | A kind of coal mine waits for covering the grouting method of burnt rock water seal curtain on mining face | |
| CN103643918A (en) | Method for searching for and preventing mine water seepage of Ordovician limestone mine field | |
| CN203487528U (en) | Underground river karst cave treatment structure for underwater pier drilled pile construction in beaded type karst area | |
| WO2017198109A1 (en) | Pitshaft coal uncovering method for coal mines whose coal seam lies in main aquifer | |
| CN103321233B (en) | The preparation method of groundwater resources retracting device in landslide deep layer draining and sliding mass | |
| CN203238649U (en) | Combined type waterproof curtain | |
| CN205260041U (en) | Method of freezing supporting construction is spouted soon to level | |
| CN104695457B (en) | The construction method of a kind of Novel silo horizontal jet grouting pile foundation hole back cover water barrier | |
| CN204530730U (en) | The novel closed cutting off water system of a kind of water rich strata foundation ditch | |
| CN202881962U (en) | Foundation pit dewatering structure | |
| CN108867673A (en) | A kind of underwater prevention method in the foundation pit based on the curtain that draws water | |
| CN102787606B (en) | Guard method to surrounding environment in a kind of excavation of foundation pit Precipitation Process | |
| CN204825923U (en) | Relay formula underground structure | |
| CN103343690A (en) | Shaft antiseep structure used when large section of inclined shaft passes through aquifer and construction method thereof | |
| CN102943480B (en) | Loess foundation pit supporting method | |
| CN104963341A (en) | Coupling type ground source heat pump mixed backfill technology and backfill material | |
| CN205382942U (en) | Multilayer underground space curtain posture subsurface excavated construction's supporting construction under existing facility | |
| CN107700508A (en) | A kind of shaped steel stirs the construction method of water spray soil curtain support pile | |
| CN109139057B (en) | Coal mining roadway floor water absorption bottom heave treatment method | |
| CN204940314U (en) | A kind of bellend pressure reduction well and deep foundation ditch structure thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20130417 Termination date: 20181015 |