CN204418194U - For high water-permeability layer of sand foundation pit dewatering device - Google Patents

For high water-permeability layer of sand foundation pit dewatering device Download PDF

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Publication number
CN204418194U
CN204418194U CN201420714698.9U CN201420714698U CN204418194U CN 204418194 U CN204418194 U CN 204418194U CN 201420714698 U CN201420714698 U CN 201420714698U CN 204418194 U CN204418194 U CN 204418194U
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CN
China
Prior art keywords
reinforcing cage
water
foundation pit
suspension hook
slush pump
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Active
Application number
CN201420714698.9U
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Chinese (zh)
Inventor
岳齐贤
马晓峰
赵建立
张涛
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China MCC20 Group Corp Ltd
Shanghai Ershiye Construction Co Ltd
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CMTCC Shanghai Shisanye Construction Co Ltd
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Priority to CN201420714698.9U priority Critical patent/CN204418194U/en
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Abstract

The utility model relates to deep foundation pit precipitation engineering field, specifically a kind of high water-permeability layer of sand foundation pit dewatering device; It is characterized in that: it comprises reinforcing cage, Dense mesh screen, A-frame, slush pump, suspension hook and scupper hose; Reinforcing cage is cylindricality, its appearance parcel Dense mesh screen, steel essence cage vertical display is in the sump of foundation ditch, foundation ditch top erection A-frame, tripod lifts suspension hook, hangs and establish slush pump below suspension hook, scupper hose is placed in reinforcing cage, its region in reinforcing cage is provided with water inlet, and one end of this scupper hose is connected with slush pump pump mouth, and the other end is connected with the main drain outside foundation ditch.Device of the present utility model has simple structure, easy to operate, cost is lower, the advantage of respond well and convenient transportation, it overcomes the many disadvantages existing for existing well point dewatering equipment, can be competent at the requirement being particularly useful for foundation pit dewatering construction operation under high water-permeability sand seam geology condition completely.

Description

For high water-permeability layer of sand foundation pit dewatering device
Technical field
The utility model relates to deep foundation pit precipitation engineering field, specifically a kind of device of high water-permeability layer of sand foundation pit dewatering.
Background technology
In recent years, continually develop utilization along with the underground space, ultra-large type deep-foundation pit engineering emerges in multitude.For the safety of protection foundation ditch periphery adjacent building, road and city planting ductwork; more and more higher to the requirement of Construction Techniques for Deep Foundation Pit; especially excavation pit in the stratum higher in groundwater table, water permeability is stronger, the safety of foundation pit dewatering construction, convenience, economy are subject to the great attention of engineers and technicians.At present, the method that foundation pit dewatering is taked mainly contains open drain and adds collecting well precipitation and well-point dewatering method.Well-points dewatering comprises again Application of light well point precipitation, eductor well point precipitation, electro-osmosis well point precipitation, Deep Pumped Wells etc.For well-points dewatering, because the spacing of each well point is less, the underground water can effectively tackled outside foundation ditch flows in foundation ditch, and keep excavation face at the bottom of Foundation Pit to be in dry state, be convenient to excavation and construction, also can keep the stable of the foundation ditch periphery soil body, effect is better.But the method also exists the shortcomings such as equipment is many, investment is large, well-point pipe is not easily protected, particularly for the deep-foundation pit engineering of narrow and small project site, its take up an area and expense often higher.Meanwhile, owing to wanting long-term precipitation in the whole excavation of foundation pit phase, high to the requirement of power supply, pumping equipment, the factors such as maintenance management is complicated seriously constrain the development of well-points dewatering technology.
Through showing existing document analysis, what mainly concentrate on dewatering construction technology and foundation ditch periphery subsidence and building to the research of foundation pit dewatering at present affects aspect, and less to the research of precipitation apparatus itself.As in the 22nd phase " construction technology " magazine in 2013, Ai Jie etc. propose the precipitation method replacing steel tube well with sand drain at " super large area deep foundation pit precipitation and soil excavation technology " literary composition, although better solve the relation of dewatering effect and expense, but owing to needing sand drainage construction, increasing the mode of well point, cause the waste of duration and material.
Utility model content
The purpose of this utility model is the various problems solving the existence of well-points dewatering equipment itself, propose a kind of device being applicable to foundation pit dewatering under high water-permeability sand seam geology condition, it have simple structure, easy to operate, cost is lower, the advantage such as respond well and convenient transportation.
In order to achieve the above object, the utility model is achieved in that
A kind of high water-permeability layer of sand foundation pit dewatering device, it comprises reinforcing cage, Dense mesh screen, A-frame, slush pump, suspension hook and scupper hose; Reinforcing cage is cylindricality, its appearance parcel Dense mesh screen, steel essence cage vertical display is in the sump of foundation ditch, foundation ditch top erection A-frame, tripod lifts suspension hook, hangs and establish slush pump below suspension hook, scupper hose is placed in reinforcing cage, its region in reinforcing cage is provided with water inlet, and one end of this scupper hose is connected with slush pump pump mouth, and the other end is connected with the main drain outside foundation ditch.
Described high water-permeability layer of sand foundation pit dewatering device, suspension hook is Chain block.
Described high water-permeability layer of sand foundation pit dewatering device, is fastened with steel wire bundle between Dense mesh screen and reinforcing cage.
Device of the present utility model has simple structure, easy to operate, cost is lower, the advantage of respond well and convenient transportation, it overcomes the many disadvantages existing for existing well point dewatering equipment, can be competent at the requirement being particularly useful for foundation pit dewatering construction operation under high water-permeability sand seam geology condition completely.
Accompanying drawing explanation
Fig. 1 is the longitudinal plan of the utility model device.
Fig. 2 is the scheme of installation of the utility model device.
Detailed description of the invention
The utility model is further illustrated below by way of specific embodiment.
Certain foundation pit dewatering adopts subregion precipitation scheme, in time being excavated to the above 300mm of absolute altitude at the bottom of foundation ditch, long 1500mm is dug with excavator four corner points bottom foundation ditch, wide 1500mm, the sump of dark 2000mm, because this Pit Discharge is comparatively large, sets up sump at foundation ditch two long side direction, foundation pit dewatering adopts the device that the utility model proposes, and it comprises reinforcing cage, Dense mesh screen, A-frame, slush pump, Chain block and scupper hose; Reinforcing cage is cylindricality, its appearance parcel Dense mesh screen, be fastened with steel wire bundle between Dense mesh screen and reinforcing cage, steel essence cage vertical display is in the sump of foundation ditch, and A-frame is set up at foundation ditch top, tripod lifts Chain block, hang below Chain block and establish slush pump, scupper hose is placed in reinforcing cage, and its region in reinforcing cage is provided with water inlet, one end of this scupper hose is connected with slush pump pump mouth, and the other end is connected with the main drain outside foundation ditch.
Specific construction process comprises the steps:
Step 1, as shown in Figure 1, before excavation of foundation pit, adopting the indented bars of 10 diameter 18mm to be processed into diameter is 800mm reinforcing cage (1), and reinforcing cage outer wall adopts diameter 8 rebar spacing 150mm coiling, the long 2000mm of reinforcing cage, diameter 1000mm.
After step 2, reinforcing cage machine, use long 6.5m, wide 2m Dense mesh screen (2) is wound around two circles along reinforcing cage outer wall overall with, uses diameter 0.8mm steel wire to wear Dense mesh screen and becomes with reinforcing cage plum blossom-shaped colligation to link, and when preventing dewatering construction, Dense mesh screen is destroyed by rush of water by sand, water.
Step 3, as shown in Figure 2, after excavation of foundation pit, treat long 1000mm, after the sump of wide 1000mm, dark 2000mm scrapes out, the reinforcing cage made is put into sump, reinforcing cage top is equal with sump top, and the supporting leg setting up A-frame (3) is firmly inserted the sump periphery soil body.Chain block (4) is installed, Chain block is linked up with and connects in A-frame, lower draw-bar hangs slush pump (5), pull Chain block lifting slush pump and be placed in reinforcing cage, suction eye is positioned at below the water surface, scupper hose (6) is connected with slush pump, adopts No. 8 galvanized wire colligations, and flowing line is to the outer municipal drainage ditch of foundation ditch.
Step 4, carry out pumping test, observe permeable, the resistance grittiness energy of Dense mesh screen, if when there is a large amount of sandstone through Dense mesh screen, adjustment Dense mesh screen is wound around the number of turns.
Step 5, for ensureing the stability of reinforcing cage and dewatering effect, after pumping test completes, medium sand is adopted to fill part between sump and reinforcing cage.
Step 6, in water-pumping/draining process, observe the groundwater table in reinforcing cage, utilize Chain block to adjust the position of slush pump outfall, until groundwater table is down to design water level.
Step 7, treat precipitation after, hang out slush pump, remove Chain block, tripod, extract equipment such as reinforcing cage carry out sump backfill as requested.

Claims (3)

1., for a high water-permeability layer of sand foundation pit dewatering device, it is characterized in that: it comprises reinforcing cage, Dense mesh screen, A-frame, slush pump, suspension hook and scupper hose; Reinforcing cage is cylindricality, its appearance parcel Dense mesh screen, steel essence cage vertical display is in the sump of foundation ditch, foundation ditch top erection A-frame, tripod lifts suspension hook, hangs and establish slush pump below suspension hook, scupper hose is placed in reinforcing cage, its region in reinforcing cage is provided with water inlet, and one end of this scupper hose is connected with slush pump pump mouth, and the other end is connected with the main drain outside foundation ditch.
2. according to claim 1 for high water-permeability layer of sand foundation pit dewatering device, it is characterized in that: suspension hook is Chain block.
3. according to claim 1 for high water-permeability layer of sand foundation pit dewatering device, it is characterized in that: be fastened with steel wire bundle between Dense mesh screen and reinforcing cage.
CN201420714698.9U 2014-11-25 2014-11-25 For high water-permeability layer of sand foundation pit dewatering device Active CN204418194U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420714698.9U CN204418194U (en) 2014-11-25 2014-11-25 For high water-permeability layer of sand foundation pit dewatering device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420714698.9U CN204418194U (en) 2014-11-25 2014-11-25 For high water-permeability layer of sand foundation pit dewatering device

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CN204418194U true CN204418194U (en) 2015-06-24

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105201770A (en) * 2015-09-25 2015-12-30 中建交通建设集团有限公司广西分公司 Portable floating slurry pump
CN105696611A (en) * 2014-11-25 2016-06-22 中冶天工上海十三冶建设有限公司 Foundation pit dewatering device for sand layer with high water permeability
CN106545010A (en) * 2015-09-17 2017-03-29 中国二十冶集团有限公司 A kind of jet grouting pile construction method of close to buildings

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105696611A (en) * 2014-11-25 2016-06-22 中冶天工上海十三冶建设有限公司 Foundation pit dewatering device for sand layer with high water permeability
CN106545010A (en) * 2015-09-17 2017-03-29 中国二十冶集团有限公司 A kind of jet grouting pile construction method of close to buildings
CN105201770A (en) * 2015-09-25 2015-12-30 中建交通建设集团有限公司广西分公司 Portable floating slurry pump

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CP01 Change in the name or title of a patent holder

Address after: 201900 Shanghai city Baoshan District Tieli Road No. 2469

Patentee after: SHANGHAI MCC NO.13 CONSTRUCTION CO., LTD.

Address before: 201900 Shanghai city Baoshan District Tieli Road No. 2469

Patentee before: CMTCC Shanghai Shisanye Construction Co., Ltd.

Address after: 201900 Shanghai city Baoshan District Tieli Road No. 2469

Patentee after: Shanghai twenty Metallurgical Construction Co., Ltd.

Address before: 201900 Shanghai city Baoshan District Tieli Road No. 2469

Patentee before: SHANGHAI MCC NO.13 CONSTRUCTION CO., LTD.

CP01 Change in the name or title of a patent holder
TR01 Transfer of patent right

Effective date of registration: 20190823

Address after: 201900 Shanghai city Baoshan District Tieli Road No. 2469

Co-patentee after: China Twenty Metallurgical Group Co., Ltd.

Patentee after: Shanghai twenty Metallurgical Construction Co., Ltd.

Address before: 201900 Shanghai city Baoshan District Tieli Road No. 2469

Patentee before: Shanghai twenty Metallurgical Construction Co., Ltd.

TR01 Transfer of patent right