CN100497840C - Compound reinforcing method for large-area soft ground - Google Patents
Compound reinforcing method for large-area soft ground Download PDFInfo
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- CN100497840C CN100497840C CNB2007100252784A CN200710025278A CN100497840C CN 100497840 C CN100497840 C CN 100497840C CN B2007100252784 A CNB2007100252784 A CN B2007100252784A CN 200710025278 A CN200710025278 A CN 200710025278A CN 100497840 C CN100497840 C CN 100497840C
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- 238000000034 method Methods 0.000 title claims abstract description 58
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 22
- 150000001875 compounds Chemical class 0.000 title claims description 19
- 238000010276 construction Methods 0.000 claims abstract description 62
- 239000002689 soil Substances 0.000 claims abstract description 16
- 239000004576 sand Substances 0.000 claims abstract description 3
- 238000001556 precipitation Methods 0.000 claims description 32
- 238000009705 shock consolidation Methods 0.000 claims description 15
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 238000007596 consolidation process Methods 0.000 claims description 11
- 239000002131 composite material Substances 0.000 claims description 9
- 238000005056 compaction Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 5
- 238000003892 spreading Methods 0.000 claims description 3
- 230000017105 transposition Effects 0.000 claims description 2
- 239000004575 stone Substances 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 29
- 238000005516 engineering process Methods 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 238000005370 electroosmosis Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The complex large area soft foundation reinforcing method, which is one combination of water level lowering method and reinforced ramming method. It features the water level lowering method with large ditches, wells and/or sand wells; and the reinforced ramming method including the first matting bagged soil layers and the subsequent ramming. The complex method has the advantages of no use of stone material and easy construction.
Description
Technical field
The present invention relates to a kind of treatment of soft foundation method, relate in particular to a kind of compound reinforcing method for large-area soft ground.Be applicable to the consolidation process of large-area soft foundation.Possession base processing technology field.
Background technology
At present, in the large-area construction of soft foundation, particularly in the construction of stockyard, road, for quickening to improve bearing capacity, usually take to reduce the method that the water content that needs the processing region soil body promptly adopts precipitation, for example adopt methods such as big open drain precipitation, vacuum well-point dewatering, light well point precipitation and electric osmose well-points dewatering at the need processing region.In fact the bearing capacity by above these method grounds does not obtain raising by a relatively large margin, also needs improve with the technology of dynamic reinforcements such as strong rammer, vibration or impact-rolling the bearing capacity of ground.But, on soft foundation, carry out dynamic consolidation construction, strong rammer equipment can't enter the place at all and launch construction, in order to satisfy the needs that plant equipment is constructed on soft foundation, often take quite thick building stones of place mat or mountain skin soil bed course, reached the required earth bearing strength of plant equipment construction on the one hand as the plant equipment construction; By laying bed course, form one deck crust layer on the other hand, and reach reinforcing soft ground by the mode of strong rammer, vibration or impact-rolling displacement on the top layer of soft foundation., owing to, caused building stones in short supply, be difficult to satisfy the demand of reinforced soft soil ground at present to the trend that large tracts of land is developed and close hillsides to facilitate afforestation in various places of soft foundation.Though in the large-area soft foundation earth bag and well point composite consolidation method of my invention, substitute building stones with earth bag and carry out treatment of soft foundation a kind of good method of can yet be regarded as, but need reinforcing area owing to earth bag in this method completely is layered on, be unfavorable for that layering divides all over the construction of the intubate in the dewatering construction technology.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, provide a kind of and can solve the root problem that earth bag substitutes building stones, can solve the compound reinforcing method for large-area soft ground that layering divides the intubate precipitation difficulty of time dewatering construction again.
The object of the present invention is achieved like this: a kind of compound reinforcing method for large-area soft ground, be on large-area soft ground, to adopt precipitation worker method to carry out the soft foundation composite consolidation to handle in conjunction with dynamic compaction, it is characterized in that: tamping point position in dynamic compaction elder generation's place mat earth bag and then carry out dynamic consolidation construction, wherein:
Described precipitation worker method is meant: one or more in big open drain dewatering construction worker method, well-points dewatering worker method and the sand drain precipitation worker method;
Described earth bag is meant: directly be filled into bag with the on-the-spot weak soil that needs to handle, sack is tightened;
Described earth bag branch multilayer is intersected stacked arrangement up and down on tamping point.
Compound reinforcing method for large-area soft ground of the present invention adopts well-points dewatering worker method to carry out the large-area soft ground composite consolidation in conjunction with dynamic compaction, and described method mainly comprises following processing step:
Step 1, the soft foundation area arrangements first pass well point pipe that need are handled carry out dewatering construction, and first pass well point pipe is arranged and divided internal layer well point pipe and peripheral tube;
Step 2, pull out internal layer well point pipe, keep peripheral tube, carry out first pass and arrange tamping point, and intersect the stacked multilayer earth bag in the tamping point position up and down, carry out the first pass dynamic consolidation construction after the hammer ram contraposition;
Step 3, rammer pusher straight tamper hole arrange that between the tamping point weak soil second time well point pipe carries out dewatering construction, and second time the well point pipe is arranged branch internal layer well point pipe and peripheral tube;
Step 4, pull out internal layer well point pipe, keep peripheral tube, carry out second time tamping point and arrange, second time tamping point is arranged between the first pass tamping point, become blossom type to arrange with the first pass tamping point, intersect the stacked multilayer earth bag in the tamping point position up and down, carry out dynamic consolidation construction after the hammer ram contraposition second time;
Step 5, through the well-points dewatering of above-mentioned many wheels, many wheels are strong ram after, completely spread earth bag in the soft foundation zone that need are handled, carry out the construction of full rammer or vibroroller cmpacting.
Compound reinforcing method for large-area soft ground of the present invention, described method adopt layering to divide all over compound construction method, wherein:
Layering is meant: precipitation well point pipe is managed by zone branch deep layer well point pipe and shallow-layer well point and is arranged,
Divide all over being meant: after arranging that by first pass the well point pipe carries out dewatering construction, it is flat to pull out well point pipe → lay in tamping point position earth bag → ram, ram pusher by force; Spread all over and put the well point pipe and carry out dewatering construction after the compound construction of first pass, carrying out second, dark, the shallow-layer position of second time precipitation well point pipe and dark, the shallow-layer position transposition layout of first pass precipitation well point pipe; Pull out second time tamping point position of second time well point pipe → layout, second time tamping point location arrangements is between the first pass tamping point, and tamping point laying earth bag → rammer, rammer pusher are put down by force to carry out second time at second time then; So repeat multipass precipitation → tamping point place mat earth bag-strong rammer;
Through above-mentioned take turns a little more ram after, carry out full rammer or vibroroller cmpacting at last, ram or the vibroroller cmpacting zone is cross layered rams by force after completely spreading the multilayer earth bag or vibroroller cmpacting reaches the smooth processing on top layer full.
Compound reinforcing method for large-area soft ground of the present invention, described earth bag by two sacks to being bundled into the disjunctor shape, to strengthen group effect.
Compound reinforcing method for large-area soft ground of the present invention, described earth bag in the placement diameter of tamping point less than the hammer ram diameter.
The present invention is regional by layering, branch time dewatering construction in the whole consolidation process that needs, for reinforcing soft ground creates favorable conditions, and then spread all in conjunction with the dynamic consolidation construction branch and to put tamping point, after intersecting the stacked multilayer earth bag, the tamping point position rams (the stacked of earth bag can be reinforced the crust layer design that forms according to need) by force.Not only do not need building stones as necessary the condition that forms " crust layer " by this law, and overcome behind the earth bag of full shop the layering of need reinforcing area, the difficulty of dividing time precipitation.Can reinforce the soft base of 6～8m scope by this law, make large-area soft foundation reach the required bearing capacity of designing requirement.
Use this technology, can guarantee that the soft foundation various device launches the requirement of construction, can spread all over by the control hierarchy branch again and put the well point pipe and reach and be fit to the demand of dissimilar construction machineries soft ground treatment self.Arrange earth bag by pressing tamping point simultaneously,, make the strong degree of depth that influences of ramming deepen because vertical effect of earth bag makes the transmission of the rammer energy degree of depth.In conjunction with other deep level of processing technology, make soft foundation reach the required bearing capacity of designing requirement again.This method construction safety coefficient is big, cost is low, and the duration is short, soft foundation bearing capacity height after treatment.Be specially adapted to soft foundation particularly bearing capacity be lower than 40Kpa/m
2The place strengthening construction.
The present invention can solve the root problem that earth bag substitutes building stones by earth bag is arranged on the tamping point, can solve the intubate precipitation difficulty that layering divides time dewatering construction again; Be arranged on the tamping point by earth bag simultaneously, the soft foundation that needs to handle can arbitrarily be controlled according to designing requirement and geological conditions, reach treatment of soft foundation, can substitute building stones in conjunction with dynamic consolidation construction fully really controlled.
In sum, this worker method has a following advantage:
1, short construction period, cost performance height: the effect that this construction technology is directly reinforced owing to the soft foundation top layer that directly utilizes earth bag that need are handled, and draw materials conveniently, cost is low, short construction period; Simultaneously, because construction cost descends, quality improves, and the soft foundation behind the earth bag composite consolidation has formed " crust layer " of practical significance, makes soft foundation be fit to the needs of different designs fast; Its cost performance improves greatly.
2, be not subjected to the low restriction of soft foundation bearing capacity, can arbitrarily adjust the bearing capacity on soft foundation top layer as required: by adjusting the number of plies of earth bag, make it to be fit to differently the to verify demand of different bearer power of ground, thus effective guarantee provided for the consolidation process of soft foundation.And, reach final required reinforcing and render a service in conjunction with other processing methods to the soft foundation method.
3, because earth bag is arranged on the tamping point, for layering, divide and to insert the well point pipe all over precipitation and created condition, make treated construction plant precipitation equilibrium; , lay a good foundation in conjunction with dynamic consolidation construction technology by many wheels precipitation, place mat earth bag for large-area soft ground improves bearing capacity.
4, by last all over full the rammer after, repaving behind the required building stones of the thick surface layer structure of pad 30cm can the intake duct face or the building of place surface layer, for accelerate the construction period created condition.
5, in construction, can be according to different geological conditionss and different transmission coefficients in conjunction with multiple dewatering construction technology, adjust as electroosmosis dewatering, vacuum-dewatering and deep layer electric osmose well point pipe, shallow-layer vacuum well point pipe, also can adjust simultaneously, to obtain different precipitation requirements by electroosmosis dewatering time, vacuum-dewatering time.
Description of drawings
Fig. 1 is a construction flow chart of the present invention.
Fig. 2 is a work order of the present invention earth bag sketch.
Fig. 3 is that two earth bags of the present invention are to pricking schematic diagram.
Fig. 4 is an earth bag layer stack schematic diagram of the present invention.
The specific embodiment
Embodiment 1:
Referring to Fig. 1, adopt earth bag and dewatering construction technology composite consolidation to handle to large-area soft ground.
Deep layer well point pipe and shallow-layer well point pipe are arranged in step 1, the soft foundation subregion that need are handled, and length dark by adjusting, the shallow well pipe is carried out the well-points dewatering construction.Can reach by vacuum electroosmosis precipitation the less mucky soil of transmission coefficient and to apply the required optimum moisture content of power; Then can take the method for forced-ventilated water to reach best power source to the bigger opaque sandy soil of transmission coefficient and reinforce required optimum moisture content by vacuum-dewatering, light well point precipitation or excavation open drain; Also can be by the multiple precipitation worker of different geology condition composite method is reached the required optimum moisture content of dynamic reinforcement.
Step 2, after underground water level, water content reach design and the required the best of dynamic consolidation construction and require, pull out internal layer well point pipe, keep peripheral tube; Lay strong tamping point in the soft foundation zone that need are handled, and intersect up and down in the tamping point position and to stack multilayer earth bag (as Fig. 2,4) and carry out dynamic consolidation construction.Before strong the rammer with the light earth bag of banking up by tamping point of pressing of hammer ram, make it after the moulding by designing requirement the rammer energy, ram number and carry out dynamic consolidation construction.General earth bag has three layers, can make the original soil ground improve about 3～4 times of bearing capacity, because the existence of earth bag pressure makes the bearing capacity of earth bag layer reach the requirement that this earth bag layer can satisfy the top working load on the one hand; Because the pressure angle of flare of earth bag reaches 42 °, make the top working load after the pressure diffusion on the other hand, the load that really acts on the weak soil layer reduces significantly, to satisfy the requirement of weak substratum bearing capacity of foundation soil.
Step 3, rammer pusher are put down, and carry out intubate precipitation between the tamping point weak soil second time, and second time precipitation reaches requirement in groundwater table, water content, after the excess pore water pressure dissipation 90%, pull out internal layer well point pipe, keep peripheral tube, carry out the tamping point layout second time; Second time tamping point is arranged between the first pass tamping point, becomes blossom type to arrange with the first pass tamping point; Intersection is stacked 2～3 layers of earth bag in the tamping point position.Can carry out dynamic consolidation construction second time according to required rammer after the hammer ram contraposition.
Step 4, through many wheel precipitation, how take turns a little ram after last time expire rammer.
After step 5, full rammer finish, treat more than the pore pressure dissipation to 90%, i.e. referable.
According to reinforcing requirement, the soft foundation that can handle need as stated above carries out the multipass composite consolidation to be handled, and makes it the requirement for bearing capacity that reaches required.
In by this worker method work progress, should note following some:
1, can't be fit to entering of dynamic compaction machinery at soft foundation before the rammer, for this reason, dynamic compaction machinery enters the big iron plate that construction area need be equipped with subgrade case or 2.0 * 6.0m, to guarantee the safety of construction machinery, generally after two times strong rammers, the soft foundation that needs to handle promptly just can directly enter without subgrade case or iron plate.
2, all over all over noticing that super quiet pore pressure dissipation can carry out next all over constructing 90% or more in the dynamic consolidation construction process.
3, carrying out last after the wheel point rams rams all over full.Owing to after full the rammer, do not need to carry out again the dewatering construction in the zone, therefore, before expiring rammer, the need processing region completely spread cross layered 2～3 layers of the earth bags of completely spreading; Carry out full rammer according to designing requirement then.
4, should keep peripheral tube continuation precipitation in construction period finishes to dial except that peripheral well point pipe all over strong the rammer until last.
The method for making of described earth bag is: earth bag adopts conventional woven bag, requirement according to soil property and required bearing capacity, specification, the size of sack and the number of plies of piling up earth bag are set, directly be filled into bag with the on-the-spot weak soil that needs to handle, sack tighten (also can be when stacking construction by two earth bags to being bundled into the disjunctor shape, as Fig. 3, to strengthen group effect).
Claims (6)
1, a kind of compound reinforcing method for large-area soft ground, be on large-area soft ground, to adopt precipitation worker method to carry out the soft foundation composite consolidation to handle in conjunction with dynamic compaction, it is characterized in that: tamping point position in dynamic compaction elder generation's place mat earth bag and then carry out dynamic consolidation construction, wherein:
Described precipitation worker method is meant: one or more in big open drain dewatering construction worker method, well-points dewatering worker method and the sand drain precipitation worker method;
Described earth bag is meant: directly be filled into bag with the on-the-spot weak soil that needs to handle, sack is tightened;
Described earth bag branch multilayer is intersected stacked arrangement up and down on tamping point.
2, a kind of compound reinforcing method for large-area soft ground according to claim 1 is characterized in that: adopt well-points dewatering worker method to carry out the large-area soft ground composite consolidation in conjunction with dynamic compaction, described method mainly comprises following processing step:
Step 1, the soft foundation area arrangements first pass well point pipe that need are handled carry out dewatering construction, and first pass well point pipe is arranged and divided internal layer well point pipe and peripheral tube;
Step 2, pull out internal layer well point pipe, keep peripheral tube, carry out first pass and arrange tamping point, and intersect the stacked multilayer earth bag in the tamping point position up and down, carry out the first pass dynamic consolidation construction after the hammer ram contraposition;
Step 3, rammer pusher straight tamper hole arrange that between the tamping point weak soil second time well point pipe carries out dewatering construction, and second time the well point pipe is arranged branch internal layer well point pipe and peripheral tube;
Step 4, pull out internal layer well point pipe, keep peripheral tube, carry out second time tamping point and arrange, second time tamping point is arranged between the first pass tamping point, become blossom type to arrange with the first pass tamping point, intersect the stacked multilayer earth bag in the tamping point position up and down, carry out dynamic consolidation construction after the hammer ram contraposition second time; Step 5, through the well-points dewatering of above-mentioned many wheels, many wheels are strong ram after, completely spread earth bag in the soft foundation zone that need are handled, carry out the construction of full rammer or vibroroller cmpacting.
3, a kind of compound reinforcing method for large-area soft ground according to claim 1 is characterized in that described method adopts layering to divide all over compound construction method, wherein:
Layering is meant: precipitation well point pipe is managed by zone branch deep layer well point pipe and shallow-layer well point and is arranged,
Divide all over being meant: after arranging that by first pass the well point pipe carries out dewatering construction, it is flat to pull out well point pipe → lay in tamping point position earth bag → ram, ram pusher by force; Spread all over and put the well point pipe and carry out dewatering construction after the compound construction of first pass, carrying out second, dark, the shallow-layer position of second time precipitation well point pipe and dark, the shallow-layer position transposition layout of first pass precipitation well point pipe; Pull out second time tamping point position of second time well point pipe → layout, second time tamping point location arrangements is between the first pass tamping point, and tamping point laying earth bag → rammer, rammer pusher are put down by force to carry out second time at second time then; So repeat multipass precipitation → tamping point place mat earth bag-strong rammer;
Through above-mentioned take turns a little more ram after, carry out full rammer or vibroroller cmpacting at last, ram or the vibroroller cmpacting zone is cross layered rams by force or vibroroller cmpacting after completely spreading the multilayer earth bag full.
4, according to claim 1,2 or 3 described a kind of compound reinforcing method for large-area soft ground, it is characterized in that described earth bag by two sacks to being bundled into the disjunctor shape, to strengthen group effect.
5, according to claim 1,2 or 3 described a kind of compound reinforcing method for large-area soft ground, the diameter that it is characterized in that described earth bag layout is less than the hammer ram diameter.
6, according to claim 1,2 or 3 described a kind of compound reinforcing method for large-area soft ground, it is characterized in that described well-points dewatering worker method is meant: a kind of in light well point precipitation worker method, vacuum well-point dewatering worker method, high vacuum well-points dewatering worker method, negative pressure well-points dewatering worker's method and the electric osmose well-points dewatering worker method or several.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100252784A CN100497840C (en) | 2007-07-16 | 2007-07-16 | Compound reinforcing method for large-area soft ground |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100252784A CN100497840C (en) | 2007-07-16 | 2007-07-16 | Compound reinforcing method for large-area soft ground |
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| CN101130951A CN101130951A (en) | 2008-02-27 |
| CN100497840C true CN100497840C (en) | 2009-06-10 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101260665B (en) * | 2008-04-15 | 2010-06-23 | 叶凝雯 | Sand bag well point composite light well point deep rapid-draining dynamic consolidation method |
| CN104727295B (en) * | 2015-03-26 | 2016-10-26 | 中化岩土工程股份有限公司 | Preexisting hole filler displacement hammer flattener heavy-tamping method |
| CN113605359B (en) * | 2021-08-13 | 2022-06-21 | 中冶集团武汉勘察研究院有限公司 | Multilayer complex soft soil foundation rapid dewatering consolidation construction structure and construction method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1168437A (en) * | 1997-04-14 | 1997-12-24 | 杨世基 | Reinforcement of mollisol foundation through impact rolling and drainage concretion |
| CN1566539A (en) * | 2003-06-12 | 2005-01-19 | 梁闽 | Self-anchoring vacuum compaction method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1168437A (en) * | 1997-04-14 | 1997-12-24 | 杨世基 | Reinforcement of mollisol foundation through impact rolling and drainage concretion |
| CN1566539A (en) * | 2003-06-12 | 2005-01-19 | 梁闽 | Self-anchoring vacuum compaction method |
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