CN102116021A - Method for treating soft foundation through vacuum transverse drainage - Google Patents
Method for treating soft foundation through vacuum transverse drainage Download PDFInfo
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- CN102116021A CN102116021A CN 201110006896 CN201110006896A CN102116021A CN 102116021 A CN102116021 A CN 102116021A CN 201110006896 CN201110006896 CN 201110006896 CN 201110006896 A CN201110006896 A CN 201110006896A CN 102116021 A CN102116021 A CN 102116021A
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- transverse drainage
- transverse
- vacuum
- drainage system
- drainage
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Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000004033 plastic Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000012528 membrane Substances 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 4
- 239000004746 geotextile Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 7
- 239000004576 sand Substances 0.000 abstract description 7
- 238000007596 consolidation process Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000002787 reinforcement Effects 0.000 abstract description 2
- 239000002689 soil Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000002984 plastic foam Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
Images
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention provides a method for treating a soft foundation through vacuum transverse drainage. The technology comprises the following main content: a transverse drainage system has the structure that two transverse plastic drain boards overlapped in a horizontal direction are used as a connecting passage, heads of longitudinal drain boards arranged at both sides are clamped and fixed between the two plastic drain boards overlapped in a horizontal direction; the ends of the transverse drain board are connected with a main strainer through a tube board connector; and the formed horizontal drainage system replaces a medium coarse sand cushion in the conventional vacuum preloading and a filter tube for horizontal drainage. The technology directly replaces the medium coarse sand cushion in the conventional vacuum preloading, shortens the vacuum transference path, accelerates consolidation, improves the reinforcement effect, and achieves high-speed, high-efficiency, energy-saving and environmentally friendly construction process.
Description
Technical field
The present invention relates to a kind of vacuum transverse drainage flexible foundation treatment method, mainly be applicable to weak soil or super soft ground, belong to the geotechnical engineering field.
Background technology
In the eighties mid-term in last century, the technique of soft soil foundation treatment that grows up is through the development of nearly two more than ten years and constantly perfect.Develop into vacuum combined stack-load, the vacuum combined worker's methods such as water treatment, low position vacuum preloading, directly discharging type vacuum prepressing of covering from single vacuum method.Make it in engineering is used, obtain success, and be widely used in the treatment of soft foundation engineering of Scale Sea Reclamation Project.
Find through application in practice,, also have bigger limitation though conventional vacuum preloading law technology is a kind of effective soft foundation processing technology.For handling the soft base of the degree of depth less than 15m, consolidation process need consume a large amount of medium coarse sand bed courses, needs a large amount of electric energy of consumption and need the long construction period.Handle the soft base that the degree of depth surpasses 15m, because the linear loss of vacuum, the deep is difficult to obtain effective consolidation effect again, and the processing time is often longer, does not satisfy the needs of engineering practical application.Therefore, research and development subgrade a kind of fast, efficient, energy-saving and environmental protection is handled the active demand that new technology is the existing market development.The present invention by improved transverse drainage system substituted traditional in thick bed course, saved resource.
Summary of the invention
The present invention relates to a kind of vacuum transverse drainage flexible foundation treatment method, this method has overcome a large amount of medium coarse sand bed courses that use in the conventional vacuum preloading, the defective that consumes ample resources; Reduce the transmission loss of vacuum in original medium coarse sand pad, shortened the vacuum bang path, accelerated soil solidifying.
For achieving the above object, mainly improved the transverse drainage system in the scheme that the present invention adopts.
The concrete steps of this method are: lay woven cloth or geotextiles on ground to be processed; If longitudinal drainage plate; The transverse drainage system is set; Spread vacuum diaphragm above the ground; Utilize the water in the vacuum pump eliminating transverse drainage system.
The transverse drainage system is many horizontally disposed transverse drainage plates, and its two ends are connected with main filter pipe.The transverse drainage plate is a level to the plastic draining board of arranging two overlapping placements as an interface channel, directly the longitudinal drainage wrench that both sides are set sandwiches level between the plastic draining board of two overlapping placements of arranging, the employing nailing is fixed, the outside is twined the filter membrane parcel again, and transverse drainage plate two ends directly are connected with main filter pipe.
The concrete parameter of transverse drainage system can be: adopt thickness 4.0 ± 0.2mm, width 150 ± 2mm, vertical water-flowing amount 〉=60cm
3/ s, transmission coefficient 〉=5 * 10
-3Cm/s, effective aperture are (with O
98Meter) two overlapping placements of wide cut plastic draining board of 80～130 μ m are as the transverse row water body, the transverse row water body is positioned between two row's longitudinal drainage bodies, the longitudinal drainage wrench that both sides are exposed folds up between overlapping transverse drainage, wrench is staggered relatively, the outside is fixed itself and transverse row water body with nailing, makes it to form an integral body at the external side parcel of transverse drainage filter membrane.In the both side ends of transverse row water body, link to each other with being responsible for connector, form a level to drainage system.
This invention be improve the traditional vacuum precompressed with the basis of medium coarse sand bed course as horizontal drainage and vacuum transmission system on, a kind of subgrade treatment technology of formation.Invention reaches the saving cost by the consumption that the transverse drainage system substitutes medium coarse sand bed course, minimizing vacuum chimney filter
30%, realize the target of energy-saving and environmental protection.The present invention mainly is applicable to weak soil (ultra-soft soil) foundation engineering in the building projects such as harbour, iron fall, highway, water conservancy, airport.
Description of drawings
Fig. 1:Organigram of the present invention.
Fig. 2:Longitudinal drainage plate and transverse row water body and chimney filter connection layout among the present invention.
Among the figure: 1, vacuum extractor 2, transverse drainage plate and chimney filter connector 3, working cushion layer
4, chimney filter 5, diaphragm seal 6, transverse drainage plate 7, vertical plastic draining board.
The specific embodiment
Certain engineering adopts vacuum transverse drainage flexible foundation treatment method as follows: arrange that horizontal plastic draining board and chimney filter form drainage system, the filter membrane aperture design is
80～100 μ m, reinforcement depth 29m, through bearing capacity after 90 days consolidation process greater than 80kPa, maximum settlement amount 2.68m.
Concrete constructing operation step is as follows:
⑴, by machinery the field is flattened, planeness reaches 5 ‰.
⑵, laying one deck woven cloth; If handle ultra-soft foundation, then arrange the 200-300g geotextiles, the plastic foam that utilizes the filter membrane parcel is as manually enclosing low bank between fields.
⑶, carry out the longitudinal drainage body construction, according to geological conditions calculate determine to set plastic draining board spacing, the degree of depth and employed band drain specifications and models.The plastic draining board protruded length is determined according to spacing, is generally 40～60cm, and wrench and parcel filter cloth require complete, concordant, and must not having into, the mud phenomenon occurs.
⑷ thickness 4.0 ± 0.2mm, width 100 ± 2mm, vertical water-flowing amount 〉=60cm are adopted in the setting of, transverse drainage system
3/ s, transmission coefficient 〉=5 * 10
-3Cm/s, effective aperture are (with O
98Meter) two overlapping placements of wide cut plastic draining board of 80～100 μ m are as the transverse drainage plate, the transverse drainage plate is positioned between two row's longitudinal drainage plates, the longitudinal drainage wrench that both sides are exposed folds up between overlapping wide cut plastic draining board, wrench is staggered relatively, the outside is fixed itself and transverse row water body with nailing, and the parcel filter membrane makes it to form an integral body in the transverse drainage plate outside.In the both side ends of transverse drainage plate, link to each other with being responsible for connector, form a level to drainage system.
⑸, laying diaphragm seal, the diaphragm seal quality adheres to specification, in factory's heat seal one-shot forming.With the diaphragm seal of prior compression moulding, divide two-layer laying, to consider that sedimentation causes the deformation requirements to film during the film of shop.The two layers of plastic film all should be imbedded and press backfill compacting in the unconcerned ditch.
⑹, peace jet pump, vacuum suction.Arrange jet vacuum pump by designing requirement, turn on pump carries out vacuum suction.
Claims (3)
1. a vacuum transverse drainage flexible foundation treatment method is characterized in that, may further comprise the steps: lay woven cloth or geotextiles on ground to be processed; If longitudinal drainage plate; The transverse drainage system is set; Spread vacuum diaphragm above the ground; Utilize the water in the vacuum pump eliminating transverse drainage system.
2. method according to claim 1 is characterized in that, the transverse drainage system is many horizontally disposed transverse drainage plates, and its two ends are connected with main filter pipe.
3. method according to claim 1 and 2, it is characterized in that, be provided with the transverse drainage plate in the transverse drainage system, the transverse drainage plate is a level to the plastic draining board of arranging two overlapping placements as an interface channel, directly the longitudinal drainage wrench that both sides are set sandwiches above-mentioned level between the plastic draining board of two overlapping placements of arranging, the employing nailing is fixed, and the outside is twined the filter membrane parcel again, and transverse drainage plate two ends directly are connected with main filter pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100068960A CN102116021B (en) | 2011-01-13 | 2011-01-13 | Method for treating soft foundation through vacuum transverse drainage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100068960A CN102116021B (en) | 2011-01-13 | 2011-01-13 | Method for treating soft foundation through vacuum transverse drainage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102116021A true CN102116021A (en) | 2011-07-06 |
| CN102116021B CN102116021B (en) | 2012-03-21 |
Family
ID=44214934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100068960A Expired - Fee Related CN102116021B (en) | 2011-01-13 | 2011-01-13 | Method for treating soft foundation through vacuum transverse drainage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102116021B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561307A (en) * | 2012-01-04 | 2012-07-11 | 河海大学 | Clogging preventing method for drainage channel based on underground high-flow-capacity drainage system |
| CN102733370A (en) * | 2012-07-18 | 2012-10-17 | 王军 | Novel vacuum-heaped combined soft soil foundation pre-loading and reinforcing method |
| CN103061230A (en) * | 2013-01-18 | 2013-04-24 | 湖南城市学院 | Construction method of technology utilizing ground source heat pump to cool and melt frozen road surfaces and drain boards for construction |
| CN103321206A (en) * | 2013-07-03 | 2013-09-25 | 中交天津港航勘察设计研究院有限公司 | Drainage process for high-organic-matter-content river-lake dredging hydraulic-fill yard |
| CN110258505A (en) * | 2019-07-15 | 2019-09-20 | 中国电建集团成都勘测设计研究院有限公司 | Treatment of soft foundation drainpipe and mating drain bar |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1837498A (en) * | 2006-02-28 | 2006-09-27 | 广州四航工程技术研究院 | Sand cushion-free pre-compacting water-draining consolidation method for soft soil foundation |
| CN201321613Y (en) * | 2008-12-04 | 2009-10-07 | 中交第一航务工程勘察设计院有限公司 | Drainage structure for foundation treatment by geotextile filter tube vacuum preconsolidation method |
| CN100554596C (en) * | 2007-11-02 | 2009-10-28 | 广州市盛洲地基基础工程有限公司 | Vacuum preloading method for non-water discharge sand cushion |
| CN201381507Y (en) * | 2009-04-13 | 2010-01-13 | 彭云 | Vacuum pre-pressed connector for connecting water outlet pipe and drain board |
-
2011
- 2011-01-13 CN CN2011100068960A patent/CN102116021B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1837498A (en) * | 2006-02-28 | 2006-09-27 | 广州四航工程技术研究院 | Sand cushion-free pre-compacting water-draining consolidation method for soft soil foundation |
| CN100554596C (en) * | 2007-11-02 | 2009-10-28 | 广州市盛洲地基基础工程有限公司 | Vacuum preloading method for non-water discharge sand cushion |
| CN201321613Y (en) * | 2008-12-04 | 2009-10-07 | 中交第一航务工程勘察设计院有限公司 | Drainage structure for foundation treatment by geotextile filter tube vacuum preconsolidation method |
| CN201381507Y (en) * | 2009-04-13 | 2010-01-13 | 彭云 | Vacuum pre-pressed connector for connecting water outlet pipe and drain board |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561307A (en) * | 2012-01-04 | 2012-07-11 | 河海大学 | Clogging preventing method for drainage channel based on underground high-flow-capacity drainage system |
| CN102561307B (en) * | 2012-01-04 | 2014-09-10 | 河海大学 | Clogging preventing method for drainage channel based on underground high-flow-capacity drainage system |
| CN102733370A (en) * | 2012-07-18 | 2012-10-17 | 王军 | Novel vacuum-heaped combined soft soil foundation pre-loading and reinforcing method |
| CN103061230A (en) * | 2013-01-18 | 2013-04-24 | 湖南城市学院 | Construction method of technology utilizing ground source heat pump to cool and melt frozen road surfaces and drain boards for construction |
| CN103321206A (en) * | 2013-07-03 | 2013-09-25 | 中交天津港航勘察设计研究院有限公司 | Drainage process for high-organic-matter-content river-lake dredging hydraulic-fill yard |
| CN103321206B (en) * | 2013-07-03 | 2015-10-14 | 中交天津港航勘察设计研究院有限公司 | A kind of high organic content river and lake dredging barged-in fill stockyard drainage technology |
| CN110258505A (en) * | 2019-07-15 | 2019-09-20 | 中国电建集团成都勘测设计研究院有限公司 | Treatment of soft foundation drainpipe and mating drain bar |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102116021B (en) | 2012-03-21 |
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