CN101413262A - Foundation treatment water drain structure of geotextile filter tube vacuum preloading method - Google Patents
Foundation treatment water drain structure of geotextile filter tube vacuum preloading method Download PDFInfo
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- CN101413262A CN101413262A CN 200810153739 CN200810153739A CN101413262A CN 101413262 A CN101413262 A CN 101413262A CN 200810153739 CN200810153739 CN 200810153739 CN 200810153739 A CN200810153739 A CN 200810153739A CN 101413262 A CN101413262 A CN 101413262A
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- chimney filter
- vacuum
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- filter tube
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention provides a drainage structure for geotextile filter tube vacuum preloading foundation treatment. The structure comprises a drainage system and a seal vacuum pumping system, wherein the drainage system comprises a plastic drainage plate buried in the soil, a filter tube is directly connected with a connector of the plastic drainage plate, and the upper side and the lower side of the filter tube are provided with a layer of geotextile protecting the filter tube respectively; the geotextile is coated on the circumferential surface of the filter tube; the geotextile is coated on the connector of the plastic drainage plate; and the filter tube is one of composite tubes of plastic hose, PVC hard tube and iron tube or hose, PVC hard tube and iron tube. The structure can reduce the linear loss in vacuum degree transfer, and compared with the prior vacuum preloading method, has the advantages of low cost and short construction period, and is not limited by the medium coarse sand source, thereby reducing the linear loss of vacuum degree, shortening the consolidation time and improving the consolidation effect.
Description
Technical field
The present invention relates to the foundation treatment technology in civil engineering work field, the discharge structure handled of geotextiles chimney filter vacuum method ground particularly, be applicable to that mud and mucky soil adopt the pre-pressure drainage consolidation method construction field, particularly great to the regional application value that lacks the medium coarse sand resource.
Background technology
Traditional vacuum method is since 20th century, the later stage eighties was by successful Application, and a large amount of engineering practices prove reinforcing soft soil, as the effective ways of mud and mucky soil, remain the main foundation treatment technology of soft foundation so far.The horizontal drainage of vacuum method and vacuum transmission system are made up of sand cushion and chimney filter, the transmittance process that traditional vacuum method ground is handled vacuum is: vacuum plant vacuumizes, enter sand cushion from being responsible for through chimney filter, again to band drain, so that soil mass consolidation.Like this, vacuum is subjected to the influence of sand cushion and loses all bigger in whole transmittance process.At present, bigger to the cost and the duration influence of vacuum method because medium coarse sand resource scarcity, price are higher.
Summary of the invention
The purpose of this invention is to provide the discharge structure that a kind of geotextiles chimney filter vacuum method ground is handled, engineering characteristic in conjunction with soft clay area, adopt geotextiles chimney filter structure for vacuum preloading ground to handle, horizontal drainage and vacuum transfer route to vacuum method are optimized, the gas clean-up transmission efficiency, reduce simultaneously the requirement of medium coarse sand as horizontal drainage, its cushioning effect can use flour sand, silt, plain soil to replace, and obtains effect that shortens the duration of a project and the purpose that reduces construction costs.
For achieving the above object; the technical solution used in the present invention provides the discharge structure that a kind of geotextiles chimney filter vacuum method ground is handled; this structure includes drainage system and sealing pumped vacuum systems; drainage system includes the plastic draining board of imbedding in the soil body; chimney filter directly is connected with the plastic draining board joint, wherein: the geotextiles that is respectively arranged with one deck protection chimney filter in the both sides up and down of described chimney filter.
Described geotextiles is wrapped on the periphery of chimney filter.
Described geotextiles is wrapped on the plastic draining board joint.
Described chimney filter is one of compound tube of plastic flexible pipe, PVC hard tube, iron pipe or flexible pipe, PVC hard tube, iron pipe.
Effect of the present invention has been this structure decrease linear loss of vacuum transmission compares with the traditional vacuum preloading that to have cost low, not restricted by medium coarse sand sand source, the advantage that the construction period is short.
Description of drawings
Fig. 1 is a geotextiles chimney filter structure section schematic diagram of the present invention;
Fig. 2 is band drain of the present invention and chimney filter connection diagram.
Fig. 3 is geotextiles chimney filter partial structurtes figure
Among the figure:
1, plastic draining board 2, chimney filter 3, geotextiles
The specific embodiment
Further specify below in conjunction with the utilization of accompanying drawing the discharge structure of geotextiles chimney filter vacuum method ground processing of the present invention.
The discharge structure that geotextiles chimney filter vacuum method ground of the present invention is handled is followed the reinforcement mechanism that traditional vacuum platen press ground is handled, and this structure is on the basis that traditional vacuum preloading ground is handled construction technology have been carried out improvement and optimization process.
The discharge structure that geotextiles chimney filter vacuum method ground of the present invention is handled; this structure includes drainage system and sealing pumped vacuum systems; drainage system includes the plastic draining board of imbedding in the soil body 1; chimney filter 2 directly is connected with the plastic draining board joint, is respectively arranged with the geotextiles 3 of one deck protection chimney filter in the both sides up and down of described chimney filter 2.Described geotextiles 3 is wrapped on the periphery of chimney filter 2, also can be wrapped on the plastic draining board joint, wraps up by the mode of twining.
One of compound tube that described chimney filter 2 is plastic flexible pipe, PVC hard tube, iron pipe or flexible pipe, PVC hard tube, iron pipe.
The discharge structure that geotextiles chimney filter vacuum method ground of the present invention is handled is achieved in that
The vacuum method of geotextiles chimney filter structure comprises drainage system and sealing pumped vacuum systems, and drainage system comprises chimney drain and horizontal drainage system again.
1. chimney drain
What geotextiles chimney filter structure for vacuum preloading chimney drain mainly adopted is plastic draining board 1, should select for use according to different construction depths, soil layer condition the main performance index such as central layer thickness, filter membrane intensity, complex tensile strength and vertical water-flowing amount of plastic draining board.Plastic draining board 1 not only has drainage, and is the main transmission channels of vacuum, and the vacuum load applies by it.
Adopt geotextiles chimney filter structure for vacuum preloading, the draining wrench is not directly to imbed in the sand cushion, but be embedded in the chimney filter 2 in the sand furrow or directly join by hose and arm, the water in the soil body directly enters chimney filter by band drain 1, has reduced drainage distance; Vacuum directly enters band drain by chimney filter, has shortened the path of vacuum transmission, thereby has improved the transmission efficiency of vacuum.
2. horizontal drainage system
Sand cushion mainly plays horizontal drainage and transmits vacuum in conventional vacuum preloading, and laying depth is 40 ~ 50cm, and clay content requires less than 3% in the sand cushion, and dry density is greater than 1.5t/m
3, transmission coefficient is greater than 1*10
-2Cm/s.Also to keep the even of sand cushion thickness during laying, fully cover chimney filter, make vertical drain, chimney filter 2 be coupled to an integral body, can form a unobstructed drainage system and vacuum pressure transmission system by sand cushion.
Adopt geotextiles chimney filter structure for vacuum preloading, the effect of medium coarse sand is weakened greatly, no longer has been the key link of transmitting vacuum and horizontal drainage, and has only played the construction cushion coat effect.Can greatly reduce its quality requirement, can suit measures to local conditions to adopt fine sand, flour sand or silt, plain fill etc. to make course according to the material source of locality.
Geotextiles chimney filter structure for vacuum preloading, its construction technology is simple, and is easy to operate, has promotion and application and is worth.
The concrete operations of geotextiles chimney filter structure are to place chimney filter between the two-layer geotextiles or the junction of chimney filter and band drain is wrapped up by geotextiles.Can lay one deck geotextiles 3 by the mud face after re-packing now, re-lay chimney filter 2, then chimney filter 2 is connected with the band drain 1 that passes geotextiles 3, laying one deck geotextiles at last realizes, also can be connected with band drain 1 by the original ground elder generation laying chimney filter 2 after re-packing, swathe geotextiles 3 in the junction of chimney filter and band drain 1 again and realize.
3. band drain and chimney filter is connected
Common vacuum preloading band drain wrench directly is embedded in the sand cushion of horizontal drainage, and geotextiles chimney filter structure for vacuum preloading is that the band drain wrench is directly linked to each other with chimney filter, or links to each other with chimney filter by the arm of flexible pipe.Connected mode comprises modes such as parcel, butt joint, winding.
4. the layout of jet pump and chimney filter
Common vacuum preloading chimney filter is arranged in the sand cushion of horizontal drainage, and chimney filter is arranged negligible amounts.Geotextiles chimney filter structure for vacuum preloading chimney filter is arranged between the two-layer geotextiles, general every row's band drain is arranged or per two row's band drains are arranged a chimney filter, with horizontal chimney filter vertical chimney filter is connected into a net again, thereby form the netted discharge structure of a horizontal drainage, jet pump is arranged in the border of ground processing region, directly links to each other with chimney filter.
5. sealing vacuumizes
The sealing of geotextiles chimney filter structure for vacuum preloading vacuumizes the same with traditional vacuum preloading, adopts 3 layers of diaphragm seal to seal, and ground is handled the border and adopted the sealing ditch to carry out, and has the zone of pervious layer need block pervious layer.
Therefore, the transmittance process of the vacuum of geotextiles chimney filter structure for vacuum preloading is: vacuum plant enters band drain from being responsible for through chimney filter, thus soil mass consolidation.
The construction sequence of geotextiles chimney filter structure for vacuum preloading is: 1. smooth place; 2. set plastic draining board; 3. spread geotextiles; 4. lay chimney filter; 5. chimney filter is connected with band drain; 6. spread geotextiles; 7. connect vacuum pump, shop film, bleed; 8. reach the requirement unloading.Or 1. smooth place; 2. set plastic draining board; 3. lay chimney filter; 4. chimney filter is connected with band drain; 5. chimney filter and band drain joint twine geotextiles; 6. connect vacuum pump, shop film, bleed; 7. reach the requirement unloading.
Claims (4)
1, a kind of foundation treatment water drain structure of geotextile filter tube vacuum preloading method; this structure includes drainage system and sealing pumped vacuum systems; drainage system includes the plastic draining board of imbedding in the soil body; chimney filter directly is connected with the plastic draining board joint, it is characterized in that: the geotextiles that is respectively arranged with one deck protection chimney filter in the both sides up and down of described chimney filter.
2, the discharge structure of handling according to the described geotextiles chimney filter of claim 1 vacuum method ground, it is characterized in that: described geotextiles is wrapped on the periphery of chimney filter.
3, the discharge structure of handling according to the described geotextiles chimney filter of claim 1 vacuum method ground, it is characterized in that: described geotextiles is wrapped on the plastic draining board joint.
4, according to the discharge structure of claim 1 or 2 described geotextiles chimney filter vacuum method grounds processing, it is characterized in that: described chimney filter is one of compound tube of plastic flexible pipe, PVC hard tube, iron pipe or flexible pipe, PVC hard tube, iron pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810153739 CN101413262A (en) | 2008-12-04 | 2008-12-04 | Foundation treatment water drain structure of geotextile filter tube vacuum preloading method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810153739 CN101413262A (en) | 2008-12-04 | 2008-12-04 | Foundation treatment water drain structure of geotextile filter tube vacuum preloading method |
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| Publication Number | Publication Date |
|---|---|
| CN101413262A true CN101413262A (en) | 2009-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810153739 Pending CN101413262A (en) | 2008-12-04 | 2008-12-04 | Foundation treatment water drain structure of geotextile filter tube vacuum preloading method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831898A (en) * | 2010-04-19 | 2010-09-15 | 中交天津港湾工程研究院有限公司 | Horizontal shallow layer negative-pressure consolidation working cushion layer technique |
| CN101591907B (en) * | 2009-06-26 | 2010-11-17 | 上海大学 | One-piece vacuum preloading method for quickly treating hydraulic fill hedoro foundation |
| CN104481000A (en) * | 2014-12-22 | 2015-04-01 | 宏祥新材料股份有限公司 | Water-saving irrigation ecological geotechnical cloth |
| CN106759241A (en) * | 2017-01-16 | 2017-05-31 | 北华航天工业学院 | A kind of vacuum method basement process discharge structure |
| CN110106861A (en) * | 2019-05-10 | 2019-08-09 | 中国建筑西南勘察设计研究院有限公司 | Intensity adjustable drains vacuum method |
-
2008
- 2008-12-04 CN CN 200810153739 patent/CN101413262A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101591907B (en) * | 2009-06-26 | 2010-11-17 | 上海大学 | One-piece vacuum preloading method for quickly treating hydraulic fill hedoro foundation |
| CN101831898A (en) * | 2010-04-19 | 2010-09-15 | 中交天津港湾工程研究院有限公司 | Horizontal shallow layer negative-pressure consolidation working cushion layer technique |
| CN101831898B (en) * | 2010-04-19 | 2012-02-22 | 中交天津港湾工程研究院有限公司 | Horizontal shallow layer negative-pressure consolidation working cushion layer technique |
| CN104481000A (en) * | 2014-12-22 | 2015-04-01 | 宏祥新材料股份有限公司 | Water-saving irrigation ecological geotechnical cloth |
| CN106759241A (en) * | 2017-01-16 | 2017-05-31 | 北华航天工业学院 | A kind of vacuum method basement process discharge structure |
| CN110106861A (en) * | 2019-05-10 | 2019-08-09 | 中国建筑西南勘察设计研究院有限公司 | Intensity adjustable drains vacuum method |
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Open date: 20090422 |