CN1609345A - High vacuum variable energy cross soft foundation treatment method - Google Patents
High vacuum variable energy cross soft foundation treatment method Download PDFInfo
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- CN1609345A CN1609345A CN 200410065320 CN200410065320A CN1609345A CN 1609345 A CN1609345 A CN 1609345A CN 200410065320 CN200410065320 CN 200410065320 CN 200410065320 A CN200410065320 A CN 200410065320A CN 1609345 A CN1609345 A CN 1609345A
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Abstract
The present invention features that according to the lamination case of soft foundation to belongs to treated, especially the water content and osmosis coefficient in different layers, the construction method including inserting vacuum tube to different layers, draining water and strong ramming or vibrating to densify are adopted. The present invention has low construction cost and high construction quality.
Description
Technical field:
The present invention relates to a kind of reinforcing and processing method of soft foundation, be specifically related to the method for a kind of " several hit close cross processing with several all over becoming energy " soft foundation, genus Soft Ground technical field all over, the synchronous draining of layering high vacuum.
Background technology:
Because the soil layer construction of processed soft foundation is comparatively complicated, the soil property of its top layer and second and third layer etc. is all different, and the water content of each soil layer is also just different with transmission coefficient.Traditional soft foundation generally adopts " High vacuum compacting method " to handle." High vacuum compacting method " is a kind of novel construction method of quick reinforcing soft ground.It is by several times the direct array formula of vacuum tube is inserted into each processed soil layer of soft foundation, then vacuum tube is vacuumized, and in conjunction with several times vibration or ram closely by force, reach the water content that reduces each soil layer, improve compactness, bearing capacity, the purpose of the settling amount behind the minimizing ground worker.Specifically seeing the patent No. for details is: the described technical scheme of ZL 01127046.2 patent document.Though this method has shortened the construction period greatly, but the part that comes with some shortcomings:
1, because this method in the draining of plant vacuum tube and hit and adopt when close layering, substep to carry out, promptly earlier is inserted into the soft foundation top layer with vacuum tube, the top layer is vacuumized draining, hit close; Again vacuum tube is inserted into the soft foundation second layer, the second layer is vacuumized draining, hit close; Again vacuum tube is inserted into the 3rd layer of soft foundation, vacuumizes draining to the 3rd layer, hit close;------; All the other by that analogy.This shows that its construction sequence is more, the construction period is still longer, generally needs 25～30 days.
2, because the aspirating hole on the vacuum tube tube wall and the filter cloth of aspirating hole periphery only are arranged in the lower semisection of the required processing thickness of each processed soil layer that is inserted into, and do not arrange aspirating hole and peripheral filter cloth on the vacuum tube tube wall of the upper semisection of the required processing thickness of processed soil layer that is inserted into, like this, the position that aspirating hole is arranged into is that the water capacity of the required processing thickness of each processed soil layer lower floor easily is discharged from, and the water on the required processing thickness of the processed soil layer upper strata that is each, the position that aspirating hole is not arranged into just is not easy to be discharged from, and makes to hit Mi Shiyi and form reluctant " spring soil ".
Summary of the invention:
First purpose of the present invention is to overcome above-mentioned deficiency, provides a kind of and can shorten the construction period once more, reduces the method that the high vacuum variable energy cross soft foundation of construction cost is handled.
First purpose of the present invention is achieved in that the method that a kind of high vacuum variable energy cross soft foundation is handled, it is the soil layer layering situation according to processed soft foundation, water content and the transmission coefficient different according to each layer soil layer, adopt the method for " several all over, layering directly insert the synchronous draining of vacuum tube and hit close cross processing synchronously all over each layers of change energy " soft foundation with several, hit strong rammer of close employing or vibration, every all over hitting close energy difference.Can make so the different weak soil of each layer through several all over the synchronous draining of high vacuum with hit synchronously close intersect carry out after, each layer basic synchronization reaches the reduction water content, improves the purpose of compactness, bearing capacity synchronously.
The present invention since adopt each layer vacuumize synchronously draining, each layer change energy hit synchronously close, make the duration " High vacuum compacting method " save about half engineering time.
Second purpose of the present invention is to provide a kind of and can makes in " High vacuum compacting method " construction, and the high vacuum variable energy that " the spring soil " that position, processed weak soil layer upper strata easily produces is solved hits the method that close intersection subgrade is handled.
Second purpose of the present invention is achieved in that the vacuum tube that above-mentioned direct array formula is inserted into each processed soil layer, thickness according to the required processing of each processed soil layer, be inserted on the vacuum tube of each processed soil layer and aspirating hole all be set up and down, and put corresponding filter cloth at the peripheral bag of aspirating hole by this required processing thickness.
Like this, to be that the soil body of thickness of the required processing of each processed soil layer is moisture all be discharged from easily at the position that aspirating hole is inserted into, this improvement of the present invention, the problem of position, processed weak soil layer upper strata easily produces in feasible " High vacuum compacting method " construction " spring soil " obtains satisfactory solution, has improved quality greatly.
Concrete effect analysis such as following table:
| High vacuum compacting method | The present invention | |
| Each layer vacuum tube planted | Each layer layering, the draining of substep pumping high vacuum pipe, substep hit close, 25～30 days construction periods | The draining of each layer hierarchical synchronization pumping high vacuum, hit close, 15～20 days construction periods |
| Aspirating hole, filter cloth are arranged on the high-vacuum tube | The peripheral filter cloth underlying of aspirating hole in the processed soil layer on the vacuum tube and aspirating hole, easy generation " spring soil " is rammed at position, soil layer upper strata | The peripheral filter cloth of aspirating hole in the processed soil layer on the vacuum tube and aspirating hole is put up and down entirely, overcomes the defective that position, soil layer upper strata " spring soil " easily produces |
The specific embodiment:
Embodiment one:
A certain stockyard reinforced soft soil ground.Soil layer construction: the top layer is the thick about 2m of dredger fill sandy soil, and the second layer is the thick about 2m of silty clay, and the 3rd layer is the thick about 10～13m of mucky soil.Ground holds heap power in the designing requirement 10m needs to bring up to 130kKpa from average 50～60kpa, and differential settlement is less than 1/600.Adopt " three times top layer, the second layer and three layers of different high-vacuum tube of direct array formulas insertion spacing of the 3rd layer of branch vacuumize and become energy for three times and hit close " cross processing subgrade for this reason:
The first step, first pass are inserted vacuum tube and the direct array formula of first vacuum tube are inserted at the bottom of the hydraulic fill sand soil layer of top layer earlier, vacuum tube insertion depth 2m, the vacuum tube pipe is apart from 3.5m * 6m, be inserted on the vacuum tube tube wall section of first floor hydraulic fill sand soil layer and all arrange aspirating hole up and down, the peripheral bag of aspirating hole is put corresponding filter cloth.At the bottom of second batch of direct array formula of vacuum tube be inserted into second layer farinose argillic horizon, vacuum tube insertion depth 4m, the vacuum tube pipe is apart from 3.5m * 4.5m, is inserted on the vacuum tube tube wall section of second layer farinose argillic horizon and all arranges aspirating hole up and down, and the peripheral bag of aspirating hole is put corresponding filter cloth.Again the 3rd batch of direct array formula of vacuum tube is inserted into the 3rd layer of silt soil strata, vacuum tube insertion depth 10m, the vacuum tube pipe is apart from 3.5m * 3m, is inserted on the vacuum tube tube wall section of the 3rd layer of silt soil strata and all arranges aspirating hole up and down, and the peripheral bag of aspirating hole is put corresponding filter cloth.Be inserted into the second layer and be inserted into the 3rd layer vacuum tube and be provided with at interval with the vacuum tube that is inserted into the top layer.
Second step, first pass vacuumize, pull out vacuum tube three layers of vacuum tube were vacuumized 5～7 days simultaneously, take out above-mentioned whole vacuum tube.
The 3rd step, first pass are rammed the soft foundation that takes out vacuum tube are rammed, and ram the about 2000KN.m of energy, and tamping pit is apart from 4m * 4m, and every hole 10 is hit.
The 4th step, second time vacuum tube of second time slotting vacuum tube are arranged with first pass and are inserted vacuum tube.
The 5th goes on foot, vacuumizes, pulls out for second time vacuum tube vacuumized 5～7 days simultaneously to three layers of vacuum tube that insert, and took out above-mentioned whole vacuum tube.
The 6th goes on foot, rams for second time the soft foundation that takes out vacuum tube is rammed, and rams energy and brings up to 3000～3300KN.m, and tamping pit is apart from 4m * 4m, and every hole 10～12 is hit, tamping pit and first pass dislocation.
The 7th step, the 3rd time slotting vacuum tube are inserted into the direct array formula of vacuum tube at the bottom of the first floor hydraulic fill sand soil layer, vacuum tube insertion depth 2m, and the vacuum tube pipe is apart from 3.5m * 5m.Be inserted on the vacuum tube tube wall section of first floor hydraulic fill sand soil layer and all arrange aspirating hole up and down, the peripheral bag of aspirating hole is put corresponding filter cloth.
The 8th step, vacuumize, pull out vacuum tube for the 3rd time the vacuum tube that is inserted at the bottom of the first floor hydraulic fill sand soil layer was vacuumized 1～2 day, take out above-mentioned whole vacuum tube.
The 9th the step, hit for the 3rd time close the soft foundation that takes out vacuum tube is hit close, vibration energy 450KN, the vibration hit close 4～5 times.
Characteristic load bearing capacity 120kpa behind the worker calculates preceding basic elimination of ramming volume worker before otherness is rammed after testing, and settlement after construction also adheres to specification.For this reason, the duration is saved half than former scheme.
Embodiment two:
A certain road reinforcement of soft soil.Soil layer construction: the top layer is the thick about 2m of silty clay, water content 45%.The second layer is the thick about 10～13m of mucky soil, water content 60%, transmission coefficient 1.4 * 10
-7Cm/s.Bearing capacity of foundation soil is brought up to 80kpa from average 30～40kpa in the designing requirement 6m.Adopt " the different high-vacuum tube of the direct array formula insertion spacing of three times shallow, dark layerings vacuumizes and becomes energy for three times and hits close " cross processing subgrade for this reason:
At the bottom of the first step, first pass are inserted vacuum tube and earlier the direct array formula of first vacuum tube are inserted into the top layer and are farinose argillic horizon, vacuum tube insertion depth 2m, the vacuum tube pipe is apart from 3.5m * 4.5m, be inserted into the top layer and be on the vacuum tube tube wall section of farinose argillic horizon and all arrange aspirating hole up and down, the peripheral bag of aspirating hole is put corresponding filter cloth.Again second batch of direct array formula of vacuum tube is inserted into second layer silt soil strata, vacuum tube insertion depth 7m, the vacuum tube pipe is apart from 3.5m * 2.5m, is inserted on the vacuum tube tube wall section of second layer silt soil strata and all arranges aspirating hole up and down, and the peripheral bag of aspirating hole is put corresponding filter cloth.The vacuum tube that is inserted into second layer silt soil strata is that vacuum tube at the bottom of the farinose argillic horizon is provided with at interval with being inserted into the top layer.
It is that vacuum tube at the bottom of the farinose argillic horizon all vacuumized 5～7 days with the vacuum tube that is inserted into second layer silt soil strata simultaneously to being inserted into the top layer that second step, first pass vacuumize, pull out vacuum tube, takes out above-mentioned whole vacuum tube.
The 3rd step, first pass are rammed the soft foundation that takes out vacuum tube are rammed, and ram the about 1200KN.m of energy, and tamping pit is apart from 3.5m * 3.5m, and every hole two is hit.
The 4th goes on foot, discloses for second time second time vacuum tube layout of vacuum tube discloses vacuum tube with first pass.
The 5th step, to vacuumize, pull out vacuum tube for second time be that vacuum tube at the bottom of the farinose argillic horizon vacuumized 5～7 days simultaneously with the vacuum tube that is inserted into second layer silt soil strata to being inserted into the top layer, takes out above-mentioned whole vacuum tube.
The 6th goes on foot, rams for second time the soft foundation that takes out vacuum tube is rammed, and rams energy and brings up to 1800KN.m, and tamping pit is apart from 3.5m * 3.5m, and every hole two is hit.Tamping pit and the dislocation of first pass tamping pit.
The 7th step, the 3rd time vacuum tube of the 3rd time slotting vacuum tube are arranged with second time slotting vacuum tube.
The 8th goes on foot, vacuumizes, pulls out for the 3rd time vacuum tube vacuumizes, pulls out vacuum tube with second time.
The 9th goes on foot, rams for the 3rd time the soft foundation that takes out vacuum tube is rammed, and ram energy and bring up to 2200KN.m, the full rammer, every hole two is hit.Higher as subregion weak soil water content, suitably adjust the pumpdown time etc., through three times vacuum, hit and form a bearing capacity after the close intersection processing soft soil in the 6m greater than the uniform crust layer of 80kpa.
The vacuum tube that the present invention inserts in the weak soil need not back-up sand, and vacuum tube gathers and calculates with the vacuum radius of influence.
Claims (5)
1, a kind of method of high vacuum variable energy cross soft foundation processing, it is characterized in that it is a soil layer layering situation according to processed soft foundation, water content and the transmission coefficient different according to each layer soil layer, adopt the method for " several all over, layering directly insert the synchronous draining of vacuum tube and hit close cross processing synchronously all over each layers of change energy " soft foundation with several, hit strong rammer of close employing or vibration, every all over hitting close energy difference.
2, the method for a kind of high vacuum variable energy cross soft foundation processing according to claim 1, it is characterized in that its concrete treatment step is: first pass is inserted into each processed soil layer of soft foundation with the direct array formula of vacuum tube, first pass vacuumizes draining to the vacuum tube that is inserted into each processed soil layer, pull out and be inserted into each processed soil layer vacuum tube, first pass hits close to each processed soil layer simultaneously; Carry out second time, the 3rd time------so again.
3, the method for a kind of high vacuum variable energy cross soft foundation processing according to claim 1 and 2, it is characterized in that direct array formula is inserted into the vacuum tube of each processed soil layer of soft foundation, thickness according to the required processing of each processed soil layer, be inserted into that the thickness by this required processing all is provided with aspirating hole up and down on the vacuum tube tube wall section of each processed soil layer, and put corresponding filter cloth at the peripheral bag of aspirating hole.
4, the method for a kind of high vacuum variable energy cross soft foundation processing according to claim 1 and 2 is characterized in that its treatment step is:
The first step, first pass are inserted vacuum tube the direct array formula of first vacuum tube are inserted into the top layer, are inserted on the vacuum tube tube wall section on top layer and all arrange aspirating holes, and the peripheral bag of aspirating hole is put corresponding filter cloth; Second batch of direct array formula of vacuum tube is inserted into the second layer, is inserted into and all arranges aspirating holes on the vacuum tube tube wall section of the second layer, the peripheral bag of aspirating hole is put corresponding filter cloth; The 3rd batch of direct array formula of vacuum tube is inserted into the 3rd layer, be inserted into and all arrange aspirating holes on the 3rd layer the vacuum tube tube wall section, the peripheral bag of aspirating hole is put corresponding filter cloth, is inserted into the second layer and is inserted into the 3rd layer vacuum tube and is inserted into surperficial vacuum tube to be provided with at interval
Second step, first pass vacuumize, pull out vacuum tube three batches the vacuum tube that inserts each processed soil layer was all vacuumized 5～7 days, take out whole vacuum tubes,
The 3rd step, first pass are rammed and the soft foundation that takes out vacuum tube is become energy are rammed,
The 4th step, second time slotting vacuum tube layout are inserted vacuum tube with first pass,
The 5th step, vacuumize, pull out vacuum tube for second time three batches of vacuum tubes that insert each processed soil layer were all vacuumized 5～7 days, take out whole vacuum tubes,
The 6th step, ram for second time and the soft foundation that takes out vacuum tube is become energy ram,
The 7th step, the 3rd time slotting vacuum tube are inserted into the top layer with the direct array formula of vacuum tube,
The 8th step, vacuumize, pull out vacuum tube the 3rd time the vacuum tube that is inserted into the top layer was vacuumized 1～2 day, take out whole vacuum tubes,
The 9th step, hit for the 3rd time and closely the soft foundation that takes out vacuum tube is hit close, hit close employing and completely ram or vibrate.
5, a kind of high vacuum variable energy according to claim 1 and 2 method of hitting close cross processing subgrade is characterized in that its treatment step is:
The first step, first pass are inserted vacuum tube and earlier the direct array formula of first vacuum tube are inserted into the top layer, be inserted into and all arrange aspirating holes on the vacuum tube tube wall section on top layer, the peripheral bag of aspirating hole is put corresponding filter cloth, again second batch of direct array formula of vacuum tube is inserted into the second layer, be inserted into and all arrange aspirating holes on the vacuum tube tube wall section of the second layer, the peripheral bag of aspirating hole is put corresponding filter cloth, and the vacuum tube that is inserted into the second layer is provided with at interval with the vacuum tube that is inserted into the top layer
Second step, first pass vacuumize, pull out vacuum tube and all vacuumized 8～10 days with the vacuum tube that is inserted into the second layer being inserted into the top layer, take out whole vacuum tubes,
The 3rd step, first pass are rammed and the soft foundation that takes out vacuum tube is become energy are rammed,
The 4th step, second time slotting vacuum tube are arranged same first pass,
The 5th goes on foot, vacuumizes, pulls out for second time vacuum tube all vacuumized 5～7 days vacuum tube that is inserted into the top layer and the vacuum tube that is inserted into the second layer, took out whole vacuum tubes,
The 6th step, ram for second time and the soft foundation that takes out vacuum tube is become energy ram,
The 7th step, the 3rd time slotting vacuum tube arrange with second time,
The 8th goes on foot, vacuumizes, pulls out for the 3rd time vacuum tube with second time,
The 9th step, ram for the 3rd time and the soft foundation that takes out vacuum tube is become energy hit close.
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| CN 200410065320 CN1609345A (en) | 2004-11-25 | 2004-11-25 | High vacuum variable energy cross soft foundation treatment method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100359100C (en) * | 2005-12-29 | 2008-01-02 | 徐士龙 | Method for treating soft foundition by fast 'high vacuum impacting dense, pile base' compound method |
| CN100392194C (en) * | 2005-10-09 | 2008-06-04 | 南京工业大学 | Forced draining mixed mode dynamic consolidation method |
| 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 |
| 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 |
| WO2010108433A1 (en) * | 2009-03-25 | 2010-09-30 | 上海港湾软地基处理工程(集团)有限公司 | Improved treating method of soft soil foundation combined with high vacuum densification |
| CN101381990B (en) * | 2007-09-04 | 2011-03-23 | 徐望 | Method for treating surface layer of soft foundation |
| CN102116019A (en) * | 2009-12-31 | 2011-07-06 | 上海港湾软地基处理工程(集团)有限公司 | Method for rapidly treating soft foundation through high vacuum densification |
| 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 |
| WO2013037122A1 (en) * | 2011-09-16 | 2013-03-21 | 上海港湾软地基处理工程(集团)有限公司 | Quick consolidation method for soft base by striking and densifying under ultravacuum |
-
2004
- 2004-11-25 CN CN 200410065320 patent/CN1609345A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100392194C (en) * | 2005-10-09 | 2008-06-04 | 南京工业大学 | Forced draining mixed mode dynamic consolidation method |
| CN100359100C (en) * | 2005-12-29 | 2008-01-02 | 徐士龙 | Method for treating soft foundition by fast 'high vacuum impacting dense, pile base' compound method |
| 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 |
| 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 |
| CN101381990B (en) * | 2007-09-04 | 2011-03-23 | 徐望 | Method for treating surface layer of soft foundation |
| 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 |
| WO2010108433A1 (en) * | 2009-03-25 | 2010-09-30 | 上海港湾软地基处理工程(集团)有限公司 | Improved treating method of soft soil foundation combined with high vacuum densification |
| CN102116019A (en) * | 2009-12-31 | 2011-07-06 | 上海港湾软地基处理工程(集团)有限公司 | Method for rapidly treating soft foundation through high vacuum densification |
| WO2013037122A1 (en) * | 2011-09-16 | 2013-03-21 | 上海港湾软地基处理工程(集团)有限公司 | Quick consolidation method for soft base by striking and densifying under ultravacuum |
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