CN1221713C - Method of processing soft foundation by quick low position high vacuum layering pre-compacting consolidation - Google Patents
Method of processing soft foundation by quick low position high vacuum layering pre-compacting consolidation Download PDFInfo
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- CN1221713C CN1221713C CN 200410014257 CN200410014257A CN1221713C CN 1221713 C CN1221713 C CN 1221713C CN 200410014257 CN200410014257 CN 200410014257 CN 200410014257 A CN200410014257 A CN 200410014257A CN 1221713 C CN1221713 C CN 1221713C
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- vacuum
- film
- films
- high vacuum
- sand
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000007596 consolidation process Methods 0.000 title claims abstract description 13
- 238000012545 processing Methods 0.000 title abstract description 3
- 239000004576 sand Substances 0.000 claims abstract description 23
- 229920003023 plastic Polymers 0.000 claims abstract description 18
- 239000004033 plastic Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000002689 soil Substances 0.000 claims description 30
- 238000000280 densification Methods 0.000 claims description 13
- 238000013461 design Methods 0.000 claims description 3
- 239000004746 geotextile Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 3
- 238000007664 blowing Methods 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention relates to a method of processing soft foundations by quick low-position high-vacuum layering pre-compacting consolidation, which comprises the following steps: (1) sand layers are laid on a sandy beach before blowing and filling, and plastic drainage plates are vertically inserted; a high-vacuum pre-compacting system is arranged in the sand layers in a transverse direction, and the sand layers are covered with plastic air isolating films; (2) the high-vacuum pre-compacting system under the films is pumped in vacuum and compacted in advance; (3) high-vacuum compact systems for hydraulically filling sands are arranged on the films in the transverse direction or the vertical direction; (4) sands are hydraulically filled on the films to a height mark; (5) the high-vacuum pre-compacting system under the films reaches the designed consolidation degree, the high-vacuum compact systems on the films start vacuuming and forcedly draining water for the first time, and then, the hydraulically-filled sands on the films is compacted by tamping or by vibration for the first time; (6) the hydraulically-filled sands on the films are quickly compacted in high vacuum for the second time or for many times until the sands are in a super-consolidation state. The present invention has the advantages of short construction period, low cost, controllable quality and quick consolidation and compact of deep layers and shallow layers.
Description
Technical field:
The present invention relates to a kind of large tracts of land flexible foundation treatment method.Especially relate to a kind of Fast-track sub-low high vacuum preloading Floor Micronesia hit a soft ground treatment methods.
Background technology:
At present China is coastal, riverine generally all does the economic development construction reclaiming fields from the sea, and coastally, riverine all forms for mud alluviation, generally has 20～60 meters, and bearing capacity is lower, and the beach absolute altitude is lower, the need dredger fill sandy soil.Need silt soil and barged-in fill are carried out fixed ground processing for this reason.
The flexible foundation treatment method that generally uses both at home and abroad has at present:
1, plastic plate+vacuum preloading promptly behind mud beach dredger fill sandy soil, is inserted plastic draining board earlier, increases the trapping film on the sand surface of hydraulic reclamation again, vacuumizes under the caudacoria and produces the vacuum load.Vacuumize under the film and bury tens ofly to hundreds of headers with employing is horizontal in sand, header connects high-vacuum pump, and high-vacuum pump connects the balance Water collecting tube, and water is evacuated to surge drum, and surge drum connects suction pump, and water is sent outside.The shortcoming of this method is: long in time limit, need can construct after the dredger fill sandy soil end, and the vacuum load is little, generally about 80Kpa, fixed index is relatively low after the precompressed.
2, this method of plastic plate+piling prepressing as pressure, is carried out discharging consolidation by inserting plastic draining board with the deep layer weak soil with the preloading soil body.The shortcoming of this method is: large tracts of land mound source difficulty, and the cost height, long in time limit.
3, this method major defect of plastic plate+vacuum preloading+soil body surcharge preloading is that to transport out ward freight big for the overload body.
4, to ram the shortcoming of the method by force be that plastic plate is passive draining at a slow speed to plastic plate+aggregate, the strong rammer to adding energy fast, and two methods are inharmonious, and the deep layer weak soil does not almost have fixed.
5, low position vacuum preloading the method is added on low level with film and carries out vacuum preloading, and dredger fill sandy soil is as the overload body.This method can save cost, reduce the duration, but exists the problem how surperficial blast is handled.
Summary of the invention:
The objective of the invention is to overcome above-mentioned deficiency, provide a kind of duration short, cost is low, quality controllable, shallow-layer deep layer can both fast consolidated compacting, the simultaneously treated Fast-track sub-low high vacuum preloading Floor Micronesia hit a soft ground treatment methods of surperficial blast.
The object of the present invention is achieved like this: a kind of Fast-track sub-low high vacuum preloading Floor Micronesia hit a soft ground treatment methods, and its specific implementation process is as follows:
1), before hydraulic reclamation, earlier at the beach sand bedding, perpendicularly in layer of sand again insert plastic draining board, and in layer of sand the pre-pressing system of lateral arrangement high vacuum, the back is carried out and is covered plastics trapping film;
2), the pre-pressing system of high vacuum vacuumizes precompressed under the film;
3), laterally or vertically arrange hydraulic fill sand high-vacuum densification system on the film;
4), on the film dredger fill sandy soil to absolute altitude;
5), the pre-pressing system precompressed of high vacuum reaches the design degree of consolidation under the film, the high-vacuum densification system begins first pass and vacuumizes forced-ventilated water on the film, then dredger fill sandy soil on the film is carried out first pass and rams or vibrate and hit close dredger fill sandy soil;
6), to dredger fill sandy soil on the film two times or severally reach the overconsolidation state all over carrying out quick ' high-vacuum densification ' to dredger fill sandy soil.
Deep layer of the present invention is utilized the gravity pressure of dredger fill sandy soil on the evacuated pressure+film of the pre-pressing system of high vacuum under the film of low level, to the quick precompressed that overloads of deep layer mud; The top layer barged-in fill adopts the high-vacuum densification system on the film, in conjunction with rolling or ram by force the purpose that reaches the top layer fast consolidated compacting.
Compare with existing method, the present invention has following advantage:
1, the duration short one is that high vacuum system power is big, be 6～7 times of conventional equipment, the 2nd, precompressed and dredger fill sandy soil are constructed synchronously, the 3rd, utilize dredger fill sandy soil and high vacuum to take out former beach underground water and produce gravity pressure, as surcharge preloading, accelerate the deep-layer consolidation time, the 4th, the quick high-vacuum densification in top layer makes the whole duration shorten about about 50%.
2, cost is low is arranged on low level with the pre-pressing system of high vacuum, i.e. beach, and with barged-in fill effect overload body, the overload body need not transported and transport, and the ingenious high vacuum of utilizing produces load and dredger fill sandy soil selfweight stress to the deep layer surcharge preloading, and cost is low.
3, quality controllable by calculating, but deep layer several times surcharge preloading, degree of consolidation height, consolidation time is short, shallow-layer adopts " high-vacuum densification " overconsolidation (I patent of invention ZL 01127046.2), make shallow-layer form the uniform crust layer of stress, effectively reduced settlement after construction and differential settlement.
The specific embodiment:
The present invention is a kind of Fast-track sub-low high vacuum preloading Floor Micronesia hit a soft ground treatment methods.Its specific implementation process is as follows:
1, before hydraulic reclamation, earlier at the layer of sand of the thick about 100cm in beach shop, perpendicularly in layer of sand again insert plastic draining board, and in layer of sand the pre-pressing system of lateral arrangement high vacuum, the back is carried out and cover plastics trapping film, the covering geotextiles is protected on the film.The pre-pressing system of high vacuum i.e. horizontal hundreds of to thousands of vacuum headers in layer of sand, and the vacuum header connects water header, and water header connects high-vacuum pump.
As former beach is silt, fine sand, in order further to increase the stress that overloads, again with the perpendicular slotting 10 meters vacuum headers of intubate machine, the vacuum header evenly gathers in above-mentioned perpendicular slotting plastic draining board, 2～4 meters of spacings are specifically calculated decision according to beach soil transmission coefficient.
2, the pre-pressing system of high vacuum vacuumizes precompressed under the film.
3, arrange hydraulic fill sand high-vacuum densification system on the film, high vacuum system can laterally or vertically be arranged.Promptly horizontal or perpendicularly insert hundreds of to thousands of vacuum headers on film, the vacuum header connects water header, water header connection high-vacuum pump.About 3～8 meters of vacuum header spacing, specifically fixed according to the transmission coefficient of dredger fill sandy soil.
4, on the film dredger fill sandy soil to absolute altitude.
5, calculate according to theory of consolidation, the pre-pressing system precompressed of high vacuum reaches the design degree of consolidation under the film, and the high-vacuum densification system begins first pass and vacuumizes forced-ventilated water on the film, then hydraulic fill sand on the film is carried out first pass and rams or vibrate and hit close dredger fill sandy soil.
6, according to parameters such as the transmission coefficient of dredger fill sandy soil, water content, to dredger fill sandy soil on the film two times or several all over carrying out quick ' high-vacuum densification '.Make dredger fill sandy soil reach the overconsolidation state.
Claims (6)
1, a kind of Fast-track sub-low high vacuum preloading Floor Micronesia hit a soft ground treatment methods is characterized in that its specific implementation process is as follows:
1), before hydraulic reclamation, earlier at the beach sand bedding, perpendicularly in layer of sand again insert plastic draining board, and in layer of sand the pre-pressing system of lateral arrangement high vacuum, the back is carried out and is covered plastics trapping film;
2), the pre-pressing system of high vacuum vacuumizes precompressed under the film;
3), laterally or vertically arrange hydraulic fill sand high-vacuum densification system on the film;
4), on the film dredger fill sandy soil to absolute altitude;
5), the pre-pressing system precompressed of high vacuum reaches the design degree of consolidation under the film, the high-vacuum densification system begins first pass and vacuumizes forced-ventilated water on the film, then dredger fill sandy soil on the film is carried out first pass and rams or vibrate and hit close dredger fill sandy soil;
6), to dredger fill sandy soil on the film two times or severally reach the overconsolidation state all over carrying out quick ' high-vacuum densification ' to dredger fill sandy soil.
2, a kind of Fast-track sub-low high vacuum preloading Floor Micronesia hit a soft ground treatment methods according to claim 1, it is characterized in that i.e. horizontal hundreds of to the thousands of vacuum headers in layer of sand of the pre-pressing system of high vacuum, the vacuum header connects water header, and water header connects high-vacuum pump.
3, a kind of Fast-track sub-low high vacuum preloading Floor Micronesia hit a soft ground treatment methods according to claim 1 and 2, it is characterized in that i.e. horizontal or perpendicular slotting hundreds of to the thousands of vacuum headers on film of high-vacuum densification system, the vacuum header connects water header, and water header connects high-vacuum pump.
4, a kind of Fast-track sub-low high vacuum preloading Floor Micronesia hit a soft ground treatment methods according to claim 1 and 2 is characterized in that former beach is as being silt, fine sand, the perpendicular perpendicular more simultaneously vacuum header of inserting of plastic draining board of inserting.
5, a kind of Fast-track sub-low high vacuum preloading Floor Micronesia hit a soft ground treatment methods according to claim 3 is characterized in that former beach is as being silt, fine sand, the perpendicular perpendicular more simultaneously vacuum header of inserting of plastic draining board of inserting.
6, a kind of Fast-track sub-low high vacuum preloading Floor Micronesia hit a soft ground treatment methods according to claim 1 and 2 is characterized in that covering geotextiles on the trapping film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410014257 CN1221713C (en) | 2004-03-09 | 2004-03-09 | Method of processing soft foundation by quick low position high vacuum layering pre-compacting consolidation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410014257 CN1221713C (en) | 2004-03-09 | 2004-03-09 | Method of processing soft foundation by quick low position high vacuum layering pre-compacting consolidation |
Publications (2)
| Publication Number | Publication Date |
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| CN1560378A CN1560378A (en) | 2005-01-05 |
| CN1221713C true CN1221713C (en) | 2005-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410014257 Expired - Lifetime CN1221713C (en) | 2004-03-09 | 2004-03-09 | Method of processing soft foundation by quick low position high vacuum layering pre-compacting consolidation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100443668C (en) * | 2006-09-01 | 2008-12-17 | 叶凝雯 | Large area soft ground treatment separated layer and time electroosmotic precipitation union vacuum precipitation method |
| CN101463601B (en) * | 2009-01-16 | 2011-08-03 | 上海港湾软地基处理工程(集团)有限公司 | Preset high vacuum soft foundation processing method by high vacuum compaction |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100516375C (en) * | 2006-03-07 | 2009-07-22 | 张志铁 | Combined method for fastening soft soil ground by dual vacuum prepressing and dynamic extruding method |
| CN101225654B (en) * | 2008-01-15 | 2010-06-09 | 同济大学 | Blow fill foundation treating method and gas injection draining device therefor |
| CN102021871B (en) * | 2009-09-15 | 2012-05-23 | 中国石油化工集团公司 | Foundation treatment method for temporary construction subgrade on dredge fill soft foundation site |
| CN101736734B (en) * | 2009-12-31 | 2014-02-26 | 郭艳景 | Quick strengthening method of extremely soft sludge |
| CN102605697A (en) * | 2012-02-14 | 2012-07-25 | 天津二十冶建设有限公司 | Sand dredger filling construction method of soft soil foundation embankment |
| CN102635107B (en) * | 2012-03-30 | 2014-12-03 | 连云港港口工程设计研究院有限公司 | Surface-layer fast solidification method for soft foundation with dredger soil |
| CN102953308B (en) * | 2012-05-17 | 2014-11-26 | 湖南大学 | Construction method of bamboo wood reinforcement bidirectional enhanced part-cut and part-fill weak roadbed |
| CN102691288B (en) * | 2012-05-22 | 2015-05-13 | 北京航空航天大学 | Technique for raising storage content of stockpiled tailing reservoir |
| CN105756034B (en) * | 2016-03-21 | 2018-03-20 | 温州大学 | It is layered supercharged vacuum prepressing ground foundation treatment method |
| CN107724364B (en) * | 2017-09-19 | 2019-12-03 | 无锡交通建设工程集团有限公司 | A kind of construction technology of soft soil foundation |
-
2004
- 2004-03-09 CN CN 200410014257 patent/CN1221713C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100443668C (en) * | 2006-09-01 | 2008-12-17 | 叶凝雯 | Large area soft ground treatment separated layer and time electroosmotic precipitation union vacuum precipitation method |
| CN101463601B (en) * | 2009-01-16 | 2011-08-03 | 上海港湾软地基处理工程(集团)有限公司 | Preset high vacuum soft foundation processing method by high vacuum compaction |
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| Publication number | Publication date |
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| CN1560378A (en) | 2005-01-05 |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shanghai Harbour Soft Soil Treatment Engineering (Group) Co.,Ltd. Assignor: Xu Tulong Contract fulfillment period: 2008.8.20 to 2014.3.9 Contract record no.: 2008320000122 Denomination of invention: Method of processing soft foundation by quick low position high vacuum layering pre-compacting consolidation Granted publication date: 20051005 License type: Exclusive license Record date: 20080909 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.8.20 TO 2014.3.9 Name of requester: SHANGHAI GANGWAN SOFT BASE TREATMENT ENGINEERING Effective date: 20080909 |
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| C53 | Correction of patent of invention or patent application | ||
| C56 | Change in the name or address of the patentee |
Owner name: XU SHILONG Free format text: FORMER NAME: XU TULONG |
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| CB03 | Change of inventor or designer information |
Inventor after: Xu Shilong Inventor before: Xu Tulong |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: XU TULONG TO: XU SHILONG |
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| CP01 | Change in the name or title of a patent holder |
Address after: 214400 room 4, building 106, Chengjiang village, Jiangyin, Jiangsu Patentee after: Xu Shilong Address before: 214400 room 4, building 106, Chengjiang village, Jiangyin, Jiangsu Patentee before: Xu Tulong |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170619 Address after: 201507, Shanghai, Jinshan District Town, East China Sea, eight groups Patentee after: SHANGHAI GEOHARBOUR INFRASTRUCTURE (GROUP) CO.,LTD. Address before: 214400 room 4, building 106, Chengjiang village, Jiangyin, Jiangsu Patentee before: Xu Shilong |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 201507 Shanghai Jinshan District, Caojing Town, Ting Wei Road, 3316, 1, two, 207 rooms. Patentee after: SHANGHAI GEOHARBOUR CONSTRUCTION GROUP Co.,Ltd. Address before: 201507 eight Caojing Town, Jinshan District, Shanghai Patentee before: SHANGHAI GEOHARBOUR INFRASTRUCTURE (GROUP) CO.,LTD. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20051005 |