CN104294806B - Excavation, diversion and drainage method for inter-pile water above water-resisting layer of deep foundation pit - Google Patents
Excavation, diversion and drainage method for inter-pile water above water-resisting layer of deep foundation pit Download PDFInfo
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- CN104294806B CN104294806B CN201410475400.8A CN201410475400A CN104294806B CN 104294806 B CN104294806 B CN 104294806B CN 201410475400 A CN201410475400 A CN 201410475400A CN 104294806 B CN104294806 B CN 104294806B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to foundation pit excavation construction, in particular to an excavation, diversion and drainage method for inter-pile water above a water-resisting layer of a deep foundation pit. The method aims at solving the problems that in an existing foundation pit excavation process, inter-pile gushing water above the water-resisting layer is high in treatment cost and large in risk and main construction water leakage hidden danger exists. The method includes the steps that firstly, after the foundation pit is excavated to the water-resisting layer, steel wire meshes are plugged in the positions of the inter-pile gushing water, and inter-pile sandy soil loss is avoided; then, water diversion hoses are inserted into the steel wire meshes, inter-pile gaps are plugged through brick walls and concrete inner walls, and water is drained from the water diversion hoses; eventually, steel wire meshes are hung between piles outside the water diversion hoses, concrete is sprayed, an inter-pile concrete outer wall is formed, and water is diverted to the bottom of the foundation pit through the water diversion hoses and then pumped away from a precipitation well outside the pit. The construction cost is greatly reduced, the construction work efficiency is improved, construction safety is guaranteed, waterproof hidden danger is eliminated, good economic benefits and social benefits are acquired, and it is proved that by practice that due to the adoption of the technical scheme, the method has the advantages of being simple in process, advanced in technology, high in practicality, good in promotion prospect and the like.
Description
Technical field
The present invention and excavation, a kind of water excavation ejectment method between square pile on deep basal pit water barrier.
Background technology
China is in subway construction high-tide period, and most deep basal pit all can run into water barrier in excavation, even if using fall
Water also cannot water above drainage water barrier, cause foundation ditch cannot continue excavation.Conventional construction method is to be formed in the outer slip casting of foundation ditch
Curtain, simultaneously at the outer Dewatering well of curtain and filter well, not only construction cost is big, and there is construction safety risk, returns
Main body is waterproof brings difficulty, the method that there is presently no not only economy but also can process the infiltration of foundation ditch water barrier.
Summary of the invention
The present invention is to solve in existing Excavation Process, on water barrier, between square pile, Tunnel gushing treatment cost is high, risk is big
And the difficult problem such as main body construction leakage hidden trouble, it is provided that a kind of low cost, process convenient, do not leave the deep of leakage hidden trouble to main body is waterproof
Water excavation ejectment method between square pile on foundation ditch water barrier.
The present invention adopts the following technical scheme that realization: on a kind of deep basal pit water barrier, between square pile, water excavates ejectment side
Method, comprises the following steps:
Step one, draw on water barrier water between square pile
A, excavation of foundation pit remove, after water barrier, the fluffing of moulding sand flowed out between fender post；B, fill between adjacent fender post with steel wire
At retention of excessive fluid；C, inserting in steel wire by hose, hose is in " 7 " type, and the upper traversing section of hose is embedded in steel wire
In net；D, outside steel wire, build brick wall by laying bricks or stones, block gap between adjacent fender post, then gunite concrete shape outside each brick wall
Concrete inner wall between pile, the upper traversing section of hose stretches out brick wall, and its vertical section is embedded between stake in concrete inner wall, draws
The end of water tube hose downwardly extends with excavation of foundation pit, and between the stake above water barrier, water is discharged downwards from hose；
Water between square pile on step 2, pump drainage water barrier
A, between all piles the outer pendant bar-mat reinforcement of concrete inner wall, bar-mat reinforcement is tangent, then with all fender post lateral surface
Gunite concrete, forms concrete exterior wall between one whole stake；B, foundation ditch continue excavation on earth, along with hose to downward
Stretching, build between stake concrete exterior wall between concrete inner wall and stake in time by laying bricks or stones, hose finally extends in the french drain bottom foundation ditch；
C, start and cheat outer dewatering well, make water penetration in french drain to below precipitation waterline at the bottom of foundation ditch so that between the stake above water barrier
Water is drained from the bottom of foundation ditch.
First after excavation of foundation pit to water barrier, fill between stake at retention of excessive fluid with steel wire, prevent sand running-down between stake；Then
Insert in steel wire with hose, block gap between stake with concrete inner wall between brick wall and stake, make water arrange from hose
Go out；Last bar-mat reinforcement of hanging between hose stud, gunite concrete, concrete exterior wall between formation stake, utilize hose handle
Water is taken away from the dewatering well in hole after guiding at the bottom of foundation ditch.
Compared with prior art, on deep basal pit water barrier of the present invention, between square pile, water excavation ejectment method has following
Advantage:
(1) fill on water barrier between square pile at retention of excessive fluid with steel wire, water is filtered, stops abrasive band and walk, it is ensured that foundation ditch is steady
Fixed；
(2) block between stake with concrete inner wall between brick wall and stake after during hose inserts steel wire, make water from drawing
Discharging in water tube hose, it is not necessary to slip casting just can continue excavation pit, construction is flexibly；
(3) during linked network, hose is stuck between stake between stake, makes hose that water is guided at the bottom of foundation ditch after spray anchor, from hole
Dewatering well is taken away, solves a waterproof difficult problem for main body construction；
In a word, the present invention makes full use of steel wire and filters sand, it is ensured that filter excavation of foundation pit safety；Water is blocked with brick wall
Source makes water get rid of from flexible pipe, a difficult problem for grouting for water plugging between square pile on solution water barrier；Hose is sprayed on a chien shih water draw
Discharge from the dewatering well in hole after at the bottom of foundation ditch, eliminate main body water leakage hidden danger, greatly reduce construction cost, improve construction work
Effect, it is ensured that construction safety, eliminates waterproof hidden danger, achieves good economic benefit and social benefit, in practice it has proved that, this technical side
Case has that technique is simple, advanced technology, the advantage such as practical, and promotion prospect is good.
Use this technology to have successfully completed No. 9 lines 7 of Shenyang Metro and mark the row of backwater above interval wind deep basal pit water barrier
Go out, filled up China's deep basal pit blank of water ejectment technology every between stake, achieved good economic benefit and social benefit.This
Bright it is particularly suited for water barrier deep excavation project.
Accompanying drawing explanation
Fig. 1 is ejectment water-bound flat cutting schematic diagram of the present invention；
Fig. 2 is ejectment water-bound A-A generalized section of the present invention；
In figure: 1-fender post；2-water barrier；Water between 3-stake；4-steel wire；5-hose；6-brick wall；7-bar-mat reinforcement；
Concrete inner wall between 8-stake；At the bottom of 9-foundation ditch；10-french drain；11-cheats outer dewatering well；Precipitation waterline at the bottom of 12-foundation ditch；Mix between 13-stake
Solidifying soil exterior wall.
Detailed description of the invention
A kind of water excavation ejectment method between square pile on deep basal pit water barrier, as shown in Figure 1, 2, comprises the following steps:
Step one, draw on water barrier water between square pile
A, excavation of foundation pit remove, after water barrier 2, the fluffing of moulding sand flowed out between fender post 1；B, fill in adjacent fender post with steel wire
Between at retention of excessive fluid；C, inserting in steel wire 4 by hose 5, hose is in " 7 " type, and the upper traversing section of hose is embedded in
In steel wire；D, outside steel wire, build brick wall 6 by laying bricks or stones, block gap between adjacent fender post, then injection is mixed outside each brick wall
Solidifying soil forms concrete inner wall 8 between stake, and the upper traversing section of hose stretches out brick wall, and its vertical section is embedded between stake in concrete
Within the walls, the end of hose downwardly extends with excavation of foundation pit, and between the stake above water barrier, water is discharged downwards from hose；
Water between square pile on step 2, pump drainage water barrier
A, between all piles the outer pendant bar-mat reinforcement 7 of concrete inner wall, bar-mat reinforcement is tangent, so with all fender post lateral surface
Rear gunite concrete, forms concrete exterior wall 13 between one whole stake；B, foundation ditch continuation excavation is at the bottom of foundation ditch 9, along with hose
Downwardly extend, build between stake concrete exterior wall between concrete inner wall and stake in time by laying bricks or stones, hose finally extends to bottom foundation ditch
French drain 10 in；Outer dewatering well 11 is cheated in C, startup, makes the water penetration in french drain to precipitation waterline less than 12 at the bottom of foundation ditch so that every
Between the stake above water layer, water is drained from the bottom of foundation ditch.
Case history
On this deep basal pit water barrier, between square pile, water excavation ejectment method marks interval ventilating shaft foundation ditch for No. 9 lines 7 of Shenyang Metro
On water barrier between square pile in water ejectment construction, ventilating shaft excavates deep 30 meters, has 2 meters of thick clay water barriers, on water barrier at 23 meters
Under be water-rich sand layer, hole is outer uses dewatering well precipitation, and water level drops to below at the bottom of excavation pit 3 meters, but excavation to water barrier time,
In the middle part of two dewatering wells, between fender post, retention of excessive fluid is relatively big, uses steel wire to fill between stake after at retention of excessive fluid and inserts steel wire with hose
In.Then water is made to discharge from hose with gap between brick wall and quick grout off stake.Last between hose stud
Hang bar-mat reinforcement, gunite concrete, form concrete exterior wall between stake, from cheating precipitation after utilizing hose that water is guided at the bottom of foundation ditch
Well is taken away.Both ensured that foundation ditch continued excavation safety, ensured again main body construction waterproof requirement.Prove this advanced technology, methodological science
Rationally.
This invention has been generalized to my company, and other have in water barrier excavation of foundation pit, greatly reduce construction cost, improve and execute
Work work efficiency, it is ensured that construction safety, eliminates waterproof hidden danger, achieves good economic benefit and social benefit, in practice it has proved that, this skill
Art scheme is practical, and promotion prospect is good.
Claims (1)
1. on deep basal pit water barrier, between square pile, water excavates an ejectment method, it is characterized in that comprising the following steps:
Step one, draw on water barrier water (3) between square pile
A, excavation of foundation pit remove the fluffing of moulding sand flowed out between fender post (1) afterwards to water barrier (2)；B, fill in adjacent fender post with steel wire
Between at retention of excessive fluid；C, being inserted in steel wire (4) by hose (5), hose is in " 7 " type, and the upper traversing section of hose buries
It is located in steel wire；D, outside steel wire, build brick wall (6) by laying bricks or stones, block gap between adjacent fender post, then outside each brick wall
Gunite concrete forms concrete inner wall (8) between stake, and the upper traversing section of hose stretches out brick wall, and its vertical section is embedded between stake
In concrete inner wall, the end of hose downwardly extends with excavation of foundation pit, and between the stake above water barrier, water is from hose
Discharge downwards；
Water between square pile on step 2, pump drainage water barrier
A, between all piles the outer pendant bar-mat reinforcement (7) of concrete inner wall, bar-mat reinforcement is tangent, then with all fender post lateral surface
Gunite concrete, forms concrete exterior wall (13) between one whole stake；B, foundation ditch continue excavation and arrive at the bottom of foundation ditch (9), along with diversion is soft
Downwardly extending of pipe, builds between stake concrete exterior wall between concrete inner wall and stake in time by laying bricks or stones, and hose finally extends at the bottom of foundation ditch
In the french drain (10) in portion；C, start and cheat outer dewatering well (11), make water penetration in french drain to precipitation waterline (12) at the bottom of foundation ditch with
Under so that between the stake above water barrier, water is drained from the bottom of foundation ditch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410475400.8A CN104294806B (en) | 2014-09-18 | 2014-09-18 | Excavation, diversion and drainage method for inter-pile water above water-resisting layer of deep foundation pit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410475400.8A CN104294806B (en) | 2014-09-18 | 2014-09-18 | Excavation, diversion and drainage method for inter-pile water above water-resisting layer of deep foundation pit |
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| Publication Number | Publication Date |
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| CN104294806A CN104294806A (en) | 2015-01-21 |
| CN104294806B true CN104294806B (en) | 2017-01-11 |
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| CN201410475400.8A Active CN104294806B (en) | 2014-09-18 | 2014-09-18 | Excavation, diversion and drainage method for inter-pile water above water-resisting layer of deep foundation pit |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178020A (en) * | 2017-05-24 | 2017-09-19 | 浙江明通建设工程有限公司 | A kind of road drainage construction method |
| CN108222043B (en) * | 2018-01-19 | 2020-05-05 | 青岛业高建设工程有限公司 | Curtain sand gushing treatment method and curtain sand gushing treatment pipe |
| CN110965567A (en) * | 2019-12-06 | 2020-04-07 | 广东省重工建筑设计院有限公司 | Foundation pit water burst treatment device |
| CN111764397A (en) * | 2020-05-28 | 2020-10-13 | 浙江土工岩土科技有限公司 | Underground diaphragm wall plugging device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101070704A (en) * | 2007-06-04 | 2007-11-14 | 上海地矿工程勘察有限公司 | Controllable one-well lamina precipitation construction method |
| CN101363228A (en) * | 2008-05-23 | 2009-02-11 | 上海广联建设发展有限公司 | Tube well for simultaneously dewatering and decompressing and technology thereof |
| CN201593204U (en) * | 2010-02-02 | 2010-09-29 | 中国建筑第四工程局有限公司 | Water-proof drainage structure of basement external wall water back face |
| CN102418347A (en) * | 2011-09-27 | 2012-04-18 | 天津住宅集团建设工程总承包有限公司 | Drainage construction method for blind drain and sump wells in deep foundation pit |
| CN102787607A (en) * | 2012-08-28 | 2012-11-21 | 大元建业集团股份有限公司 | Deep foundation pit precipitation support construction method applicable to coastal region |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3424006B2 (en) * | 2000-04-11 | 2003-07-07 | 独立行政法人農業技術研究機構 | Field groundwater level control method. |
-
2014
- 2014-09-18 CN CN201410475400.8A patent/CN104294806B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101070704A (en) * | 2007-06-04 | 2007-11-14 | 上海地矿工程勘察有限公司 | Controllable one-well lamina precipitation construction method |
| CN101363228A (en) * | 2008-05-23 | 2009-02-11 | 上海广联建设发展有限公司 | Tube well for simultaneously dewatering and decompressing and technology thereof |
| CN201593204U (en) * | 2010-02-02 | 2010-09-29 | 中国建筑第四工程局有限公司 | Water-proof drainage structure of basement external wall water back face |
| CN102418347A (en) * | 2011-09-27 | 2012-04-18 | 天津住宅集团建设工程总承包有限公司 | Drainage construction method for blind drain and sump wells in deep foundation pit |
| CN102787607A (en) * | 2012-08-28 | 2012-11-21 | 大元建业集团股份有限公司 | Deep foundation pit precipitation support construction method applicable to coastal region |
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| CN104294806A (en) | 2015-01-21 |
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