CN1624250A - Method of soft ground treatment using high vacuum variable energy cross tampering - Google Patents
Method of soft ground treatment using high vacuum variable energy cross tampering Download PDFInfo
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- CN1624250A CN1624250A CN 200410065325 CN200410065325A CN1624250A CN 1624250 A CN1624250 A CN 1624250A CN 200410065325 CN200410065325 CN 200410065325 CN 200410065325 A CN200410065325 A CN 200410065325A CN 1624250 A CN1624250 A CN 1624250A
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Abstract
This invention relates to a method of treating high vacuum energy-variation crossing soft groundsill, whose character is that it adopts the method of 'delaminating and directly imbeds vacuum pipe to discharge water at the same time, extract some pipes and simultaneous treatment', compaction is through ramming or vibration, with different energy in different compaction processes. Its advantages are short construction time, efficiently controlling the best compacting times, effect and 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 that a kind of novel high vacuum variable energy cross soft foundation is handled, belong to the Soft Ground technical field.
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 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, this method need be hit after the high vacuum draining when close, needs the vacuum tube subregion is all pulled out, and the equipment of ramming then enters construction area and hits close.Because vacuum tube is all pulled out, in vibration or ram by force when close, vibration or the strong pore water that is produced that rams can not in time vacuumize discharge by vacuum tube, and the pore water pressure that hits close generation changes and can't intuitively show, just can not react intuitively also whether hit the secret emissary reasonable with energy, it is excessive or too small promptly to ram energy, also just can not effectively control the best amount of ramming and ram effect, can produce certain influence to construction quality.
3, 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 and easily forms reluctant " spring soil " when ramming.
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, effectively controls the best amount of ramming and ram effect, improve the method for the novel high vacuum variable energy cross soft foundation processing of construction quality.
First purpose of the present invention is achieved in that the method that a kind of novel 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 directly insert the synchronous draining of vacuum tube, pull out the partial vacuum pipe and hit close cross processing synchronously all over each layers of change energy " soft foundation with several all over, layering, close employing is strong rams 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, the purpose of raising compactness, bearing capacity.Make the duration save the engineering time of half approximately than " High vacuum compacting method ".
The present invention is because the partial vacuum pipe is pulled out in employing, do not pull out (the conventional deep vacuum pipe of keeping somewhere) and keep somewhere the partial vacuum pipe, when ramming operation, change according to pore water pressure, the i.e. vacuum tube of the Liu Zhiing water yield situation of change of effectively discharging can intuitively reflect to become energy whether hit the energy that the secret emissary uses reasonable.Promptly ram energy when excessive or too small, the discharge water yield of keeping somewhere high-vacuum tube all can reduce.The 2nd: can more ingenious utilization ram the maximum value of initial generation excess pore water pressure this " malleation ", keeping somewhere under high-vacuum tube " negative pressure " synchronous effect, utilize " pressure reduction " of ramming initial maximum to make the more effective discharge water yield of weak soil in part.
Second purpose of the present invention is to provide a kind of can make in " High vacuum compacting method " construction the method that the novel high vacuum variable energy cross soft foundation that " the spring soil " that position, processed weak soil layer upper strata easily produces is solved 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 construction 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 |
| Pulling out of construction area high-vacuum tube | All pull out and hit behind the high-vacuum tube closely, hit close energy and be difficult to control, every to discharge the water yield all over high-vacuum densification relatively less | Pull out high-vacuum tube every row, the high-vacuum tube of keeping somewhere some does not pull out, high vacuum draining and ram synchronization job simultaneously, can intuitively reflect the reasonability of ramming energy by the vacuum tube chain water yield of keeping somewhere, maximum " was pressed many discharge waters at the beginning of other can effectively utilize and ram |
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 100kpa from average 50～60kpa, and differential settlement is less than 1/600.Adopt " three times top layer, the second layer, three layers of different high-vacuum tube of direct array formulas insertion spacing of the 3rd layer of branch vacuumize, pull out the partial vacuum pipe and become energy for three times and hit close " cross processing subgrade for this reason:
At the bottom of the first step, first pass are inserted vacuum tube the direct array formula of first vacuum tube are inserted into top layer hydraulic fill sand soil layer, 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 top layer 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 the partial vacuum pipe three layers of vacuum tube that insert each processed soil layer were vacuumized 5～7 days simultaneously, take out above-mentioned top layer, second layer vacuum tube, keep somewhere the 3rd layer of vacuum tube and do not pull out.
The 3rd step, first pass are rammed the soft foundation that takes out vacuum tube are rammed, and ram energy 2000KN.m.
Top layer, the second layer vacuum tube that the 4th step, second time slotting vacuum tube are pulled out first pass returns slotting, and it is arranged with first pass and inserts vacuum tube.
The 5th step, vacuumize, pull out the partial vacuum pipe for second time three layers of vacuum tube that insert each processed soil layer were vacuumized 5～7 days simultaneously, take out above-mentioned top layer, the 3rd layer of vacuum tube, keep somewhere second layer 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, pulls out the second layer vacuum tube of above-mentioned indwelling.
At the bottom of the 7th step, the 3rd time slotting vacuum tube, directly the array formula was inserted into top layer hydraulic fill sand soil layer again with the top layer vacuum tube pulled out, the vacuum tube pipe was apart from 3.5m * 5m.Be inserted on the vacuum tube tube wall section of top layer 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 hydraulic fill sand soil layer of top 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, can intuitively show the optimum capacity of tamping energy, is strictly on guard against the formation of " spring soil ".
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 " three times top layers vacuumize, pull out the partial vacuum pipe and become energy for three times with the different high-vacuum tube of the direct array formula insertion spacing of second layer layering and hit 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 the partial vacuum pipe, takes out above-mentioned top layer 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.
The 4th step, second time slotting vacuum tube return the above-mentioned top layer vacuum tube of pulling out slotting, and second time top layer vacuum tube layout is with first pass top layer vacuum tube.
The 5th step, to vacuumize, pull out the partial vacuum pipe 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 top layer vacuum tube.
The 6th goes on foot, rams for second time the soft foundation that takes out the top layer vacuum tube is rammed, and rams energy and brings up to 1800KN.m, pulls out second layer vacuum tube.
The 7th step, the 3rd time slotting vacuum tube insert the top layer vacuum tube once more, and the top layer vacuum tube is arranged with second time top layer vacuum tube and arranged.
The 8th the step, vacuumize 1～2 day pumpdown time for the 3rd time.
The 9th goes on foot, rams for the 3rd time the soft foundation that takes out vacuum tube is rammed, and rams energy and brings up to 2200KN.m.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 novel 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 directly insert the synchronous draining of vacuum tube, pull out the partial vacuum pipe and hit close cross processing synchronously all over each layers of change energy " soft foundation with several all over, layering, hit strong rammer of close employing or vibration, every all over hitting close energy difference.
2, the method for a kind of novel high vacuum variable energy cross soft foundation processing according to claim 1, it is characterized in that its concrete treatment step is: first pass, the direct array formula of vacuum tube is inserted into each processed soil layer of soft foundation, the vacuum tube that is inserted into each processed soil layer is vacuumized draining, pull out the partial vacuum pipe, hit close simultaneously each processed soil layer of pulling out the partial vacuum pipe; Second time, the vacuum tube of pulling out is returned slotting, again the vacuum tube that is inserted into each processed soil layer is vacuumized draining, pull out the partial vacuum pipe again, each processed soil layer of pulling out the partial vacuum pipe is hit simultaneously close, pull out the vacuum tube of indwelling; The 3rd time, the direct array formula of vacuum tube is inserted into each processed soil layer of soft foundation, the vacuum tube that is inserted into each processed soil layer is vacuumized draining, pull out whole vacuum tubes, hit close simultaneously to each processed soil layer of pulling out whole vacuum tubes.
3, the method for a kind of novel high vacuum variable energy cross soft foundation processing according to claim 2, it is characterized in that its concrete treatment step is: first pass, the direct array formula of vacuum tube is inserted into each processed top layer of soft foundation, the second layer and the 3rd layer, the vacuum tube that is inserted into top layer, the second layer and the 3rd layer is vacuumized draining, pull out top layer and second layer vacuum tube, hit close simultaneously each processed soil layer of pulling out top layer, second layer vacuum tube; Second time, return top layer, the second layer vacuum tube of pulling out slotting, again the vacuum tube that is inserted into top layer, the second layer and the 3rd layer is vacuumized draining, pull out top layer and the 3rd layer of vacuum tube again, hit close simultaneously to each processed soil layer of pulling out top layer and the 3rd layer of vacuum tube, pull out the second layer vacuum tube of indwelling, the 3rd time, the direct array formula of vacuum tube is inserted into the soft foundation top layer, the vacuum tube that is inserted into the top layer is vacuumized draining, pull out the whole vacuum tubes that are inserted into the top layer, hit close simultaneously each processed soil layer of pulling out whole vacuum tubes.
4, the method for a kind of novel high vacuum variable energy cross soft foundation processing according to claim 2, it is characterized in that its concrete treatment step is: first pass, the direct array formula of vacuum tube is inserted into the processed top layer of soft foundation and the second layer, the vacuum tube that is inserted into the top layer and the second layer is vacuumized draining, pull out the top layer vacuum tube, hit close simultaneously each processed soil layer of pulling out the top layer vacuum tube; Second time, return the top layer vacuum tube of pulling out slotting, again the vacuum tube that is inserted into the top layer and the second layer is vacuumized draining, pull out the top layer vacuum tube again, hit close simultaneously to each processed soil layer of pulling out the top layer vacuum tube, pull out the second layer vacuum tube of indwelling,, the vacuum tube that is inserted into the top layer is vacuumized draining the 3rd time, the direct array formula of vacuum tube is inserted into the soft foundation top layer, pull out the vacuum tube that is inserted into the top layer, hit close simultaneously each processed soil layer of pulling out vacuum tube.
5, the method for handling according to one of them described a kind of novel high vacuum variable energy cross soft foundation of claim 1～4, 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.
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| CNB2004100653254A CN1293263C (en) | 2004-11-25 | 2004-11-25 | Method of soft ground treatment using high vacuum variable energy cross tampering |
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| CNB2004100653254A CN1293263C (en) | 2004-11-25 | 2004-11-25 | Method of soft ground treatment using high vacuum variable energy cross tampering |
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| CN1624250A true CN1624250A (en) | 2005-06-08 |
| CN1293263C CN1293263C (en) | 2007-01-03 |
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Cited By (6)
| 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 |
| WO2008064550A1 (en) * | 2006-12-01 | 2008-06-05 | Shanghai Harbour Soft Soil Treatment Engineering Co. Ltd. | Information method combined with dynamic consolidation and vacuum drainage for reinforcement of soft soil ground |
| CN101349051B (en) * | 2008-09-09 | 2010-06-02 | 建研地基基础工程有限责任公司 | Saline soil area combined drain system and forced ramming foundation treating method thereof |
| CN101381990B (en) * | 2007-09-04 | 2011-03-23 | 徐望 | Method for treating surface layer of soft foundation |
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1228494A (en) * | 1998-03-06 | 1999-09-15 | 张凌 | Vacuum deep well reinforcing method for large thickness soft soil foundation |
| CN1127595C (en) * | 2001-07-28 | 2003-11-12 | 徐士龙 | 'High-vacuum compacting method' for quickly treaitng soft foundation |
-
2004
- 2004-11-25 CN CNB2004100653254A patent/CN1293263C/en active Active
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 |
| WO2008064550A1 (en) * | 2006-12-01 | 2008-06-05 | Shanghai Harbour Soft Soil Treatment Engineering Co. Ltd. | Information method combined with dynamic consolidation and vacuum drainage for reinforcement of soft soil ground |
| US8360682B2 (en) | 2006-12-01 | 2013-01-29 | Shanghai Harbour Soft Soil Treatment Engineering Co. Ltd. | Information method combined with dynamic consolidation and vacuum drainage for reinforcement of soft soil ground |
| AU2007327261B2 (en) * | 2006-12-01 | 2013-08-22 | Shanghai Geoharbour Construction Group Co., Ltd. | An information-based high vacuum densification method for fast treatment of soft soil |
| AU2007327261B9 (en) * | 2006-12-01 | 2013-09-12 | Shanghai Geoharbour Construction Group Co., Ltd. | An information-based high vacuum densification method for fast treatment of soft soil |
| CN101381990B (en) * | 2007-09-04 | 2011-03-23 | 徐望 | Method for treating surface layer of soft foundation |
| CN101349051B (en) * | 2008-09-09 | 2010-06-02 | 建研地基基础工程有限责任公司 | Saline soil area combined drain system and forced ramming foundation treating method thereof |
| 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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Assignee: Shanghai Gangwan Soft Foundation Treatment Engineering Co., Ltd. Assignor: Xu Shilong Contract fulfillment period: 2008.8.20 to 2014.11.25 Contract record no.: 2008320000123 Denomination of invention: Method of soft ground treatment using high vacuum variable energy cross tampering Granted publication date: 20070103 License type: Exclusive license Record date: 2008.9.9 |
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Free format text: EXCLUSIVE LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.8.20 TO 2014.11.25 Name of requester: SHANGHAI GANGWAN SOFT BASE TREATMENT ENGINEERING Effective date: 20080909 |
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Effective date of registration: 20170620 Address after: 201507, Shanghai, Jinshan District Town, East China Sea, eight groups Patentee after: Shanghai harbor infrastructure (Group) Co., Ltd. Address before: 214400, room 4, building 106, Chengjiang village, Jiangyin, Jiangsu Patentee before: Xu Shilong |
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Address after: 201507 Shanghai Jinshan District, Caojing Town, Ting Wei Road, 3316, 1, two, 207 rooms. Patentee after: Shanghai Bay infrastructure construction (Group) Limited by Share Ltd Address before: 201507 eight Caojing Town, Jinshan District, Shanghai Patentee before: Shanghai harbor infrastructure (Group) Co., Ltd. |