CN106284291A - The plug in draining board precipitation piling prepressing soft base processing method of steel cylinder structure sealing - Google Patents
The plug in draining board precipitation piling prepressing soft base processing method of steel cylinder structure sealing Download PDFInfo
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- CN106284291A CN106284291A CN201610664735.3A CN201610664735A CN106284291A CN 106284291 A CN106284291 A CN 106284291A CN 201610664735 A CN201610664735 A CN 201610664735A CN 106284291 A CN106284291 A CN 106284291A
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- Prior art keywords
- steel cylinder
- precipitation
- draining board
- processing method
- plug
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses the plug in draining board precipitation piling prepressing soft base processing method of a kind of steel cylinder structure sealing, sequentially include the following steps: sinking steel cylinder and secondary lattice storehouse；Cast-in-situ Piles in Sand-filling in steel cylinder and in secondary lattice storehouse；Complete treatment of soft foundation region to close up, steel cylinder is attached patching with secondary lattice storehouse；Closing up region and be backfilled to operation side, then precipitation is to below backfill face, land inserted to play plastic draining board；It is backfilled to precompressed height, adjusts precipitation water level；Fully loaded precompressed；Meet and unload after processing requirement.The present invention can reduce the difficulty of inserted to play plastic draining board rapidly for needing the region for the treatment of of soft foundation provide sealing environment and reduce operation side artificially, and by regulation precipitation water level, be conducive to meeting the stability requirement of structure；3rd, can continue backfill preloading and combine precipitation, it is provided that the surcharge ratio of prefabricating load is 1.5～3.0, and is conducive to meeting the stability requirement of structure by precipitation, hence it is evident that be better than traditional foundation treatment mode.
Description
Technical field
The present invention relates to engineering construction field, be specifically related to a kind of in waters formed steel cylinder cofferdam water sealing structure soft
Base processing method.
Background technology
Deep insert Large-diameter Steel cylindrical structure have in the big depth of water, thick soft basic ring border excavation less, stablize, the duration soon, ring
Protect excellent advantage, possess uneven soil layer centering capacity, especially there is reliable sealing sand leakage avoiding function, use class steely
The anti-corrosion measure of pile tube, can meet the requirement in service life of more than 50 years, isostructural at breakwater, shore protection, harbour, man-made island
Construction has wide prospect of the application.
Conventional soft base (or ground) processing mode, is to form discharging consolidation passage by inserted to play plastic draining board, passes through
Preloading provides prefabricating load, and preloading is the highest, and the prefabricating load being provided that is the biggest, but preloading is the highest, the additional load of structure
The biggest, influence whether the stability of structure, thus the height that can limit preloading affect Foundation Treatment Effect, therefore prefabricating load and
Stability Analysis of Structures is the community of contradiction, is difficult to take into account simultaneously.Conventional operation side is often controlled by natural waterline, from
And make the height of downpayment backfill greatly, and bringing the biggest adverse effect to stablizing of structure, draining board needs to penetrate thicker returning
Filler, thus also bring certain difficulty to inserted to play draining board.
The mode of conventional well point dewatering basement process, to a certain extent, is the water level by reducing preloading, by buoyant unit weight
Become dry density, improve prefabricating load；Simultaneously because precipitation, the load of generation is " negative pressure ", favourable to structure.But this structure
Needing extra soft primitive period limit to carry out patching, the absolute altitude of inserted to play draining board is often natural working water level simultaneously, right
The basement process requirement of big piling prepressing, construction time Stability Analysis of Structures and difficulty of construction is provided all to there is bigger difficulty, make in needing
The scheme of obtaining still has certain limitation.
Summary of the invention
The present invention is directed to the defect of prior art, it is provided that one is passed through insert-type steel cylinder sealing, can artificially be reduced and execute
The work scope of operation, the difficulty of construction that reduces, the surcharge ratio of raising prefabricating load, all have more at the aspect such as construction quality and completion time of project
Inserted to play plastic draining board based on the insert-type steel cylindrical structure sealing associating precipitation piling prepressing treatment of soft foundation side of excellent performance
Method.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that the insert row water of a kind of steel cylinder structure sealing
Plate precipitation piling prepressing soft base processing method, it is characterised in that: carry out according to the following steps,
1), sinking steel cylinder and secondary lattice storehouse, steel cylinder and secondary Ge Cang top expose one section on the water surface；
2), toward Cast-in-situ Piles in Sand-filling in steel cylinder and in secondary lattice storehouse, and steel cylinder is attached patching with secondary lattice storehouse, completes
Treatment of soft foundation region closes up；
3), determine operation side, below the externally-located water surface of operation side, close up region and be backfilled to construction operation
Face, then precipitation is to below backfill face, inserted to play plastic draining board；
4) it is backfilled to precompressed height, again, adjusts precipitation water level；
5), fully loaded precompressed；
6), meet basement process requirement after, unloading.
Preferably, steel cylinder and secondary lattice storehouse are sunk down into supporting course, and steel cylinder and junction are carried out patching, must
When wanting, bottom is carried out sealing, carry for closing up precipitating, pre-pressing after rear treatment of soft foundation uses the dry operation side of low absolute altitude and preloading
For condition.
Preferably, the sealing condition utilizing steel cylinder and secondary lattice storehouse to provide, after treatment of soft foundation region closes up, use low absolute altitude
Dry operation side.
Preferably, the backfill material closing up region is sand, and land-based area forms backfill and combines with treatment of soft foundation preloading.
Preferably, Cast-in-situ Piles in Sand-filling buoyant unit weight is made to become dry density by arranging well-points dewatering, it is provided that the big overload of 1.5～3.0
Ratio.
The processing method using the present invention can reach advantages below, and first, use insert-type steel cylindrical structure, can be quick
Ground for need treatment of soft foundation region provide sealing environment, simultaneously steel cylinder structure can also serve as structure (as man-made island, foundation ditch,
Shore protection and building enclosure etc.) a part；Second, the sealing environment provided based on steel cylinder, can reduce construction artificially and make
Industry face, reduces the difficulty of inserted to play plastic draining board, by regulation precipitation water level, is more beneficial for meeting the stability requirement of structure；The
Three, for meeting the demand of prefabricating load, can continue backfill preloading and combine precipitation, precipitation waterline can be according to prefabricating load size
Comprehensively determining with Stability Analysis of Structures, the surcharge ratio of the most available prefabricating load is between 1.5～3.0 and favourable by precipitation
In the stability requirement meeting structure, hence it is evident that be better than traditional foundation treatment mode.
Accompanying drawing explanation
Fig. 1 is steel cylinder structure sealing floor map；
Fig. 2 is processing procedure sectional schematic diagram of the present invention.
Detailed description of the invention
In the present embodiment, elaborating as a example by certain man-made island treatment of soft foundation, man-made island is in deep soft soil foundation, water
The adverse circumstances that the wave is high deeply, by the plug in draining board precipitation piling prepressing soft base processing method of steel cylinder structure sealing so that ground
Base processes to obtain and surmounts in the good effect of conventional processing scheme.Seeing figures.1.and.2, basic process step is as follows:
1), use large-scale crane ship that along shaking, prefabricated steel cylinder is sink to impermeable stratum, construct safe and reliable sealing and enclose
Protection structure, it is achieved quick whole island sealing；
2), utilize whole island sealing condition, in island, be backfilled to-5.0m, precipitation to-6.0m；On-5.0m operation platform, land
Upper inserted to play plastic draining board, draining board top mark height-15.0m, end absolute altitude maximum-40.0m, draining board extreme length is 25m；Return
It is filled to+3.5m, well-points dewatering to-16.0m, it is achieved big surcharge ratio 1.2～3.0 precompressed, accelerates consolidation, remaining heavy after reducing work
Fall；Backfill material is medium coarse sand, and land-based area forms backfill and combines with treatment of soft foundation preloading, with the not side of abandoning, falls to carry balance as principle.
3), it is fully loaded with precompressed 120 days (squeeze time of different engineerings is different), by dewatering well precipitation to-16.0m, it is achieved
Fully loaded precompressed, the early stage rate of settling is 50mm/ days, progressively slows down as 16mm/ days, for 5mm/ days after lasting 30 days, accumulative sedimentation
About 2.0m.
Below the present invention being described in detail, the above, only the preferred embodiments of the invention, when can not
Limit the application practical range, the most all made impartial change and modification according to the application scope, all should still belong to covering scope of the present invention
In.
Claims (5)
1. the plug in draining board precipitation piling prepressing soft base processing method of a steel cylinder structure sealing, it is characterised in that: by following
Step is carried out,
1), sinking steel cylinder and secondary lattice, steel cylinder and secondary Ge Cang top expose one section on the water surface；
2), toward Cast-in-situ Piles in Sand-filling in steel cylinder and in secondary lattice storehouse, and steel cylinder and secondary Ge Cang junction are carried out patching, complete soft
Base processing region closes up；
3), determine operation side, below the externally-located water surface of operation side, close up region and be backfilled to operation side,
Then precipitation is to below backfill face, inserted to play plastic draining board；
4) it is backfilled to precompressed height, again, adjusts precipitation water level；
5), fully loaded precompressed；
6), meet settlement request after, unloading.
The plug in draining board precipitation piling prepressing soft base processing method of steel cylinder structure sealing the most according to claim 1, its
It is characterised by: steel cylinder and secondary lattice storehouse are sunk down into supporting course, and steel cylinder and junction are carried out patching, the most right
Bottom carries out sealing, provides bar for closing up precipitating, pre-pressing after rear treatment of soft foundation uses the dry operation side of low absolute altitude and preloading
Part.
The plug in draining board precipitation piling prepressing soft base processing method of steel cylinder structure sealing the most according to claim 1, its
It is characterised by: the sealing condition utilizing steel cylinder and secondary lattice storehouse to provide, after treatment of soft foundation region closes up, uses the dry application of low absolute altitude
The work scope of operation.
The plug in draining board precipitation piling prepressing soft base processing method of steel cylinder structure sealing the most according to claim 1, its
Being characterised by: the backfill material closing up region is sand, land-based area forms backfill and combines with treatment of soft foundation preloading.
The plug in draining board precipitation piling prepressing soft base processing method of steel cylinder structure sealing the most according to claim 1, its
Being characterized by arranging well-points dewatering makes Cast-in-situ Piles in Sand-filling buoyant unit weight become dry density, it is provided that the big surcharge ratio of 1.5～3.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610664735.3A CN106284291A (en) | 2016-08-12 | 2016-08-12 | The plug in draining board precipitation piling prepressing soft base processing method of steel cylinder structure sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610664735.3A CN106284291A (en) | 2016-08-12 | 2016-08-12 | The plug in draining board precipitation piling prepressing soft base processing method of steel cylinder structure sealing |
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| CN106284291A true CN106284291A (en) | 2017-01-04 |
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| CN201610664735.3A Pending CN106284291A (en) | 2016-08-12 | 2016-08-12 | The plug in draining board precipitation piling prepressing soft base processing method of steel cylinder structure sealing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108483056A (en) * | 2018-03-23 | 2018-09-04 | 中交第四航务工程勘察设计院有限公司 | Extensive sand material preloading and the portable belt transport system and method carried of falling |
| CN109577280A (en) * | 2018-12-18 | 2019-04-05 | 中交第航务工程局有限公司 | The core structure and its construction technology of a kind of native compound action |
Citations (4)
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|---|---|---|---|---|
| JP2004190374A (en) * | 2002-12-12 | 2004-07-08 | Port & Airport Research Institute | Soft ground improving method and soft ground improving unit |
| CN101634140A (en) * | 2009-08-19 | 2010-01-27 | 上海港湾软地基处理工程有限公司 | Consolidation method of soft earth foundation |
| KR101209008B1 (en) * | 2010-11-10 | 2012-12-06 | (주)범한엔지니어링 종합건축사 사무소 | A Reinforcement method of weak stratum use of suction drainage |
| CN103031837A (en) * | 2013-01-10 | 2013-04-10 | 中交四航工程研究院有限公司 | Method for reinforcing deep and soft soil foundation by combining well-points dewatering with preloading |
-
2016
- 2016-08-12 CN CN201610664735.3A patent/CN106284291A/en active Pending
Patent Citations (4)
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|---|---|---|---|---|
| JP2004190374A (en) * | 2002-12-12 | 2004-07-08 | Port & Airport Research Institute | Soft ground improving method and soft ground improving unit |
| CN101634140A (en) * | 2009-08-19 | 2010-01-27 | 上海港湾软地基处理工程有限公司 | Consolidation method of soft earth foundation |
| KR101209008B1 (en) * | 2010-11-10 | 2012-12-06 | (주)범한엔지니어링 종합건축사 사무소 | A Reinforcement method of weak stratum use of suction drainage |
| CN103031837A (en) * | 2013-01-10 | 2013-04-10 | 中交四航工程研究院有限公司 | Method for reinforcing deep and soft soil foundation by combining well-points dewatering with preloading |
Non-Patent Citations (1)
| Title |
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| 王彦林等: "港珠澳大桥外海人工岛快速成岛技术", 《施工技术》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108483056A (en) * | 2018-03-23 | 2018-09-04 | 中交第四航务工程勘察设计院有限公司 | Extensive sand material preloading and the portable belt transport system and method carried of falling |
| CN108483056B (en) * | 2018-03-23 | 2023-07-21 | 中交第四航务工程勘察设计院有限公司 | Mobile belt conveying system and method for large-scale sand and stone material stacking and unloading |
| CN109577280A (en) * | 2018-12-18 | 2019-04-05 | 中交第航务工程局有限公司 | The core structure and its construction technology of a kind of native compound action |
| CN109577280B (en) * | 2018-12-18 | 2024-03-12 | 中交第一航务工程局有限公司 | Cylinder structure with pile soil composite action and construction process thereof |
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Application publication date: 20170104 |