CN101130952A - Packingless fast vacuum prepressing dynamic consolidation method - Google Patents

Packingless fast vacuum prepressing dynamic consolidation method Download PDF

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Publication number
CN101130952A
CN101130952A CNA2007100295455A CN200710029545A CN101130952A CN 101130952 A CN101130952 A CN 101130952A CN A2007100295455 A CNA2007100295455 A CN A2007100295455A CN 200710029545 A CN200710029545 A CN 200710029545A CN 101130952 A CN101130952 A CN 101130952A
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chimney filter
filter
vacuum
stratum
soil
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CN100549304C (en
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汤连生
梁永根
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汤连生
梁永根
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Abstract

The present invention relates to large area foundation treatment, and is especially process of treating large area soft foundation. The process includes the following steps: 1. arranging filter openings according to the stratum state; 2. inserting PVC filter pipes with filter pores in the calculated size into stratum, connecting the upper ends of the filter pipes beyond the soil layer to the main pipe and connecting the main pipe directly to the vacuumizing equipment; 3. vacuumizing based on the design requirement; and 4. withdrawing filter pipes after the soft soil layer consolidates and ramming to reach even high foundation strength. The process of the present invention has short construction period, less vacuum degree loss, saving in construction material and high foundation reinforcing effect.

Description

A kind of nothing sealing fast vacuum prepressing dynamic compaction
Technical field:
The present invention relates to a kind of large tracts of land ground processing method, particularly a kind of large tracts of land flexible foundation treatment method belongs to the innovative technology of large tracts of land flexible foundation treatment method.
Background technology:
Along with the quickening of China's modernization, in the process of (coastal) urban construction, a large amount of soft foundations needs to handle, and using more widely, flexible foundation treatment method has:
1, vacuum method: this method uses the atmosphere precompressed as the precompressed loading, lay earlier permeable sand of one deck and gravel on the ground, use board-plugging device to plug plastic draining board then by design pitch, cover one deck gas tight seal film more thereon, use vacuum pump to bleed then and make the higher vacuum of maintenance in the seepy material, be sucked out gradually and reach the precompressed effect thereby in the pore water of soil, produce negative pore water pressure, pore water.
But there is following limitation in traditional vacuum precompressed flexible foundation treatment method:
(1) the ancillary works measure to be arranged for the ditching press mold, could form vacuum, and tear film open and could continue to construct because of the antiskid stability requirement need unload, its complex procedures, the processing time is longer relatively, and cost is also higher.
(2) vacuum that provides of vacuum pump must be delivered in the weak soil layer by permeable sand and layer of gravel, and loss of vacuum is bigger.To after vacuumizing a period of time, could under film, produce higher stable vacuum.Cause the construction period to prolong.
(3) plastic draining board that plugs in work progress is retained in the soil layer after construction finishes, and can not reuse, and causes great waste on material, and the soil body is caused certain pollution.
(4) laying multi-layer sealed film and build envelope wall improves the cost of subgrade processing greatly.
(5) lay sand cushion and need consume a large amount of medium coarse sands, the cost height.
(6) for the weak soil layer at the bottom, if carry out the subgrade processing operation under water, owing to still do not reach requirement aspect sealing, the traditional vacuum preloading method can't carry out, carry out subgrade after having to water drained again and handle, the ecosystem of locality is produced certain influence.
2, dynamic compaction: this method be repeatedly will be very heavy hammer (being generally 10~40t) mentions eminence and it is freely fallen (fall and give ground with vibration with impact apart from being generally 10~40m), make the ground compression concretion, thereby improve the intensity of ground and reduce its compressibilty.
Dynamic compaction is widely used, but for the higher cohesive soil of saturation ratio, treatment effect is not good, mucky soil ground especially, and treatment effect is poorer.Need the united drainage concretion method to use and just can reach treatment effect preferably.
Summary of the invention:
The objective of the invention is to improve the deficiency of existing vacuum preloading method, provide a kind of duration short, loss of vacuum is little, saves construction material, the transverse drainage of layer of sand capable of blocking, economy, the nothing sealing fast vacuum prepressing dynamic compaction that consolidation effect is good.
The object of the present invention is achieved like this: nothing sealing fast vacuum prepressing dynamic compaction of the present invention includes following steps:
1) determines stratum condition according to the place exploration data, arrange filter opening according to stratum condition;
2) chimney filter is plugged into the stratum by projected depth, the chimney filter upper end is exposed soil layer and directly is connected with the person in charge, is responsible for then directly to be connected with vaccum-pumping equipment and carries out vacuum preloading construction;
3) vacuumize with vaccum-pumping equipment, under the effect of inside and outside differential pressure, the water in the weak viscous soil horizon is inhaled into chimney filter, and rises along chimney filter, discharges by being responsible for, up to meeting design requirement.
Above-mentioned steps 3) finish after, if the treatment of soft foundation requirement for bearing capacity is not high, dismountable main chimney filter and vacuum extractor when meeting design requirement, construction of soft soil treatment finishes; If the treatment of soft foundation requirement for bearing capacity is higher, when the weak soil sedimentation tends towards stability, will pull out one section on the chimney filter, the perforate chimney filter is in the non-weak viscous soil horizon as far as possible; Layout at pipeline enclosure then and ram by force, chimney filter is used as the drainage channel of non-weak viscous soil horizon, thereby effectively reinforce non-weak viscous soil horizon, and make weak viscous soil horizon obtain further densification, soil layer reaches the bearing capacity of design.
The chimney filter section of above-mentioned chimney filter in weak viscous soil horizon opened filter opening, and wraps up with nonwoven, and reserves one section not perforate chimney filter according to the soil layer settling amount, the bottom sealing of chimney filter.
Above-mentioned chimney filter is when handling the more shallow stratum of mud buried depth, use the chimney filter of whole perforates, build envelope wall with colluding the method for mixing around in the place, perhaps bury one deck diaphragm seal underground reach sealing in the mud effect, in order to reach drainage effect preferably, also can be in weak soil layer upper berth one deck geotextiles.
Above-mentioned steps 2) uses and to collude machine or board-plugging device plugs chimney filter into the stratum by projected depth.
Above-mentioned chimney filter is made by pvc pipe.
The present invention is owing to adopt packingless vacuum preloading method, be responsible for and directly link to each other with chimney filter, according to the soil layer situation is that chimney filter is provided with filter opening, do not need to use sand cushion, therefore, not only the construction period is short for it, loss of vacuum is little, save construction material, and the transverse drainage of layer of sand capable of blocking, economy, consolidation effect is good.The present invention is that a kind of construction effect is good, convenient and practical nothing sealing fast vacuum prepressing dynamic compaction.
Description of drawings:
Fig. 1 is to use certain treatment of soft foundation project construction place sectional drawing of this method.
Fig. 2 is to use certain treatment of soft foundation project construction place plan view of this method.
Fig. 3 is to use certain treatment of soft foundation project construction place tamping point arrangement diagram of this method.
Among the figure: 1 is responsible for 2 chimney filters, 3 hydraulic reclamation layers of sand, 4 silt soil stratas, 5 layers of sand, 6 times overburden layers, 7 no perforate chimney filter sections, 8 perforate chimney filter sections, 9 stratigraphic boundaries, 10 flap valve, 11 vacuum meters, 12 vaccum-pumping equipments, 13 gutters.
The specific embodiment:
Embodiment:
The object of the present invention is achieved like this: nothing sealing fast vacuum prepressing dynamic compaction of the present invention includes following steps:
1) determines stratum condition according to the place exploration data, arrange filter opening according to stratum condition;
2) chimney filter 2 is plugged into the stratum by projected depth, chimney filter 2 upper ends are exposed soil layer and directly are connected with the person in charge 1, are responsible for 1 direct connection with vaccum-pumping equipment 12 and carry out vacuum preloading construction; Vaccum-pumping equipment is a vacuum pump.
3) vacuumize with vaccum-pumping equipment 12, under the effect of inside and outside differential pressure, the water in the weak viscous soil horizon is inhaled into chimney filter 2, and rises along chimney filter, discharges by being responsible for 1, up to meeting design requirement.
Above-mentioned steps 3) finish after, if the treatment of soft foundation requirement for bearing capacity is not high, dismountable main chimney filter and vacuum extractor when meeting design requirement, construction of soft soil treatment finishes; If the treatment of soft foundation requirement for bearing capacity is higher, when the weak soil sedimentation tends towards stability, will pull out one section on the chimney filter, the perforate chimney filter is in the non-weak viscous soil horizon as far as possible; Layout at pipeline enclosure then and ram by force, chimney filter is used as the drainage channel of non-weak viscous soil horizon, thereby effectively reinforce non-weak viscous soil horizon, and make weak viscous soil horizon obtain further densification, soil layer reaches the bearing capacity of design.
The chimney filter section of above-mentioned chimney filter in weak viscous soil horizon opened filter opening 8, and wraps up with nonwoven, and reserves one section not perforate chimney filter 7 according to the soil layer settling amount, the bottom sealing of chimney filter 2.
Above-mentioned chimney filter 2 uses the chimney filter of whole perforates when handling the more shallow stratum of mud buried depth, mix method build envelope wall with colluding around in the place, perhaps buries one deck diaphragm seal underground reach sealing in the mud 4 effect.
Above-mentioned steps 2) uses and to collude machine or board-plugging device plugs chimney filter into the stratum by projected depth.
Above-mentioned chimney filter 2 is made by pvc pipe.
Principle of the present invention is:
1, vacuum pump produces vacuum in the person in charge, and be delivered in the vertical chimney filter, vacuum in the chimney filter 2 produces a negative pore water pressure by filter opening in weak viscous soil horizon, vertical drain forms pressure differential and produces seepage force as the some and the pore water pressure in the soil mass consolidation of negative pressure source, seepage force impels pore water to discharge from the soil body, and the discharge of pore water causes the reduction of pore water pressure.Under the constant substantially situation of total stress in the soil body, the reduction value of pore water pressure is the value added of effective stress, impels soil solidifying under the effect of the effective stress that increases newly.Laterally not draining of chimney filter section in sand or layer of gravel, the loss of vacuum that in vacuum, can not cause owing to the good water-permeable and air permeable performance of layer of sand like this, thus reached the effect of sealing.
2, the chimney filter in weak viscous soil horizon should be reserved one section and not offer filter opening, can avoid like this in vacuum, and when the weak soil layer produced sedimentation, band filter opening section chimney filter entered sandy gravel stratum, and causes the loss of vacuum.
3, this method does not use sand mat of subgrade to transmit vacuum, but directly by main, in the weak soil layer, the loss of vacuum is less with vacuum transmission for chimney filter.
4, after weak soil is fully fixed, pull up one section chimney filter, make filter opening section chimney filter enter upper strata fill stratum or hydraulic reclamation layer of sand, carry out the low-energy strong-ramming construction this moment, the perforate chimney filter just in time can be used as the drainage channel of sand or layer of gravel, help to quicken the dissipation of excess pore water pressure in the dynamic consolidation construction like this, thereby reach better consolidation effect.
5, for the more shallow situation of mud buried depth, mud has reached the effect of sealing in fact to descending overburden layer, uses one deck diaphragm seal to bury underground in the mud, or uses to collude and mix the sealing that method build envelope wall can guarantee whole treatment of soft foundation place.
Detailed construction step of the present invention is as follows:
(1) before construction, removes mud or other foreign material of end face, in order to draining.In order to guarantee marching into the arena of later stage dynamic compaction machinery tool, under the softer situation of back fill course, can lay one deck woven cloth and one deck geo-grid earlier.
(2) calculate by design length and width gauge and be responsible for and the quantity of chimney filter.General chimney filter is laid along the person in charge with 1.5~3m spacing by person in charge of per 2~4m layout, and peripheral chimney filter spacing can suitably be dwindled, and arranges with 1~2m.The concrete layout according to the disposal field requires to decide.
(3) stratum condition according to the place designs the construction depth of chimney filter and the position and the length of filter opening.The zone that differs greatly for stratum condition can be divided into it the zone of several stratum conditions than homogeneous, designs construction depth respectively, and chimney filter will penetrate more than the pending weak argillic horizon 0.5m at least.
(4) chimney filter filter opening distribution design.Chimney filter is opened filter opening in weak viscous soil horizon, chimney filter is not opened filter opening in sandy gravel stratum, but in order to prevent that band filter opening section chimney filter enters sandy gravel stratum when soil layer produces sedimentation, thereby cause the loss of vacuum, must in weak viscous soil horizon, reserve the two sections chimney filter and not open filter opening.The length of not perforate of chimney filter section in the weak viscous soil horizon (reserving section) epimere equals this soil layer upper bottom surface settling amount and deducts chimney filter deflection (being the deflection of soil layer upper bottom surface with respect to chimney filter), the length of hypomere equals the chimney filter deflection and deducts soil layer bottom surface settling amount, illustrates computational process below:
If foundation soil is respectively hydraulic reclamation layer of sand 3, silt soil strata 4, sandy gravel stratum 5, silt soil strata 6 from top to bottom, bed thickness is respectively h 1, h 2, h 3, h 4, then available layerwise summation method calculates the settling amount of total settlement and each weak viscous soil horizon.
s = Σ i = 1 n Δs i - - - ( a )
Δs i = ϵ i H i = Δe i 1 + e 1 i H i = e 1 i - e 2 i 1 + e 1 i H i - - - ( b )
= a i ( p 2 i - p 1 i ) 1 + e 1 i H i - - - ( c )
= Δp i E si H i
(d)
According to known conditions, can select one in (b)~(c) to calculate.Wherein the subsidiary stress of each soil layer can vacuum obtain along the change in depth curve in the sealing fast vacuum prepressing dynamic compaction by having.
ε in the formula i--the mean pressure shrinkage strain of-----Di i stratified soil;
H i--the thickness of-----Di i stratified soil;
e 1i-----corresponding to the i stratified soil average of aspect selfweight stress value up and down
p 1 i = σ c ( i - 1 ) + σ ci 2 The void ratio that obtains from the compression curve of soil.
e 2i-----corresponding to i stratified soil selfweight stress average p 1iWith the average of aspect subsidiary stress value up and down Δp i = σ z ( i - 1 ) + σ zi 2 Sum p 2i=p 1i+ Δ p iThe void ratio that obtains from the compression curve of soil;
--------the i layering is corresponding to p for α 1i~p 2iThe compression coefficient of section;
E Si--------the i layering is corresponding to p 1i~p 2iThe modulus of compressibility of section.
Can calculate the decrement s of soil layer 4 and soil layer 6 by said method 2, s 4, then soil layer 4 chimney filters reservation segment length is:
Epimere: l=s 2+ s 4-h
Hypomere: l=h-s 4
Soil layer 6 chimney filters are reserved segment length:
Epimere: l=s 4-h
Hypomere: l=h
H is the deflection of chimney filter in the formula, and it is relevant with the chimney filter construction depth with soil layer property, can draw by the field observation curve of chimney filter slippage when constructing in the past, and when the following overburden layer of weak viscous soil horizon is firm ground, h ≈ 0.When calculate 1<0 the time, then do not reserve.
(5) preparation of main chimney filter.Be responsible for and adopt pvc pipe, not perforate, latus rectum is 50~70mm.Chimney filter is combined by the plurality of sections pvc pipe, latus rectum is 40~50mm, the length of segmentation has five kinds of 5m, 2m, 1m, 0.5m, 0.2m, the chimney filter section of every kind of length has out filter opening again and does not open two types of filter openings, wherein open the outer wrapping of the pvc pipe layer of non-woven fabric of filter opening and block, can be combined into the chimney filter of random length by the pvc pipe of these length to prevent filter opening.
(6) according to the result of calculation stringing figure that draws, the axis of every row stake should should be normal direction perpendicular to the route center line on the curve, emits concrete stake position according to the figure that lays out pile ground on the scene, makes tangible sign.The long reinforcing bar of general available 15cm is inserted on the stake position, and the most handy red paint in stake top is smeared red.
(7) set chimney filter.Vertically place the chimney filter section and use colluding of the machine of colluding to mix bucket then it is plugged in the underground layer on design stake position, one section enters behind the soil layer immediately that another section pvc pipe continues construction on the last period, the pvc pipe tail end connected, and reaches the degree of depth of design up to the chimney filter bottom.
(8) lay the person in charge, each top of arranging chimney filter all is connected with the person in charge by three-way interface.Peripheral adopt a circle be responsible for the place around, note during laying guaranteeing the sealing of whole main chimney filter system preventing gas leakage.
(9) build gutter 13.Build gutter, ditch width 1~2m around along the place.
(10) vacuum extractor 12 is installed.Use the centrifugal pump vacuum extractor, separate unit vacuum pump processing area is decided according to the power of disposal field requirement for bearing capacity and vacuum pump, generally speaking can be according to per 1500~2000m 2Use a vacuum pump (power 7.5kW) to calculate the usage quantity of vacuum pump.Vacuum pump is connected with the person in charge by linkage, notes the uniformity that vacuum pump is arranged in the whole construction place.
(11) vacuum meter 11 is installed.On vacuum pump and chimney filter, lay vacuum meter respectively, with the variation of reflection stabilization zone vacuum, every corresponding vacuum meter of pump, the chimney filter vacuum meter is then by per 1500~2000m 2Corresponding one.
(12) power supply unit is installed, is comprised generator, switch board and cable.
(13) vacuumize construction.Incipient stage, cause moment to destroy for preventing vacuum preloading to the stabilization zone surrounding soil, must strictly control evacuation rate, can open the half vacuum pump earlier, increase vacuum pump workbench number then gradually.Treat that beginning the dead load timing when vacuum meter 11 readings reach 80kPa (or design load) on the chimney filter vacuumizes.
(14) remove vacuum prepressing device 12.When the Design of Soft Soil requirement for bearing capacity not Gao Shike when reaching following standard, directly remove all main chimney filter and vacuum extractors, construction of soft soil treatment finishes.Satisfy following all conditions and can think that construction of soft soil treatment finishes:
1) ground consolidation degree 〉=85%;
2) rate of settling of observation in continuous 10 days is less than 2mm/d;
3) reach the characteristic value of foundation bearing capacity of designing requirement.
When the Design of Soft Soil requirement for bearing capacity is higher, when reaching following standard, removes a side vacuum extractor and march into the arena to make things convenient for the dynamic compaction machinery tool:
1) ground consolidation degree 〉=85%;
2) rate of settling of observation in continuous 10 days is less than 2mm/d;
And carry out the construction of following steps
1) pulls out on the chimney filter.To pull out one section on the chimney filter, make band filter opening section chimney filter enter that banket in the upper strata or the hydraulic reclamation layer of sand, the draining of soil layer when promoting to ram by force.
2) the low-energy strong-ramming construction is carried out in the place.Tamping point between two row's chimney filters, adopts twice rammer and a general rammer construction by 1.5~3m arranged in squares, must reach more than 85% and can carry out at the pore water pressure dissipation degree at interval between first pass and second time strong rammer.If but the time allows the proper extension time, the strong rammer finished the back leveling, and measures absolute altitude.
3) remove vacuum extractor and main chimney filter, smooth place, construction finishes, and carries out an acceptance inspection.For the more shallow situation of weak viscous soil horizon buried depth, under the weak soil water content condition with higher, also can use the chimney filter of whole perforates, build envelope wall with colluding the method for mixing around in the place, perhaps bury one deck diaphragm seal underground reach sealing in the weak viscous soil horizon effect, this moment can be in weak soil layer upper berth one deck geotextiles for helping draining.
No sealed vacuum pre-pressing and strong tamping method is applicable to the large-area soft ground reinforcing, can be used for the construction of airfield runway, highway, harbour, bunding, particularly the soil layer to weak viscous soil horizon deep folder thin sand has good consolidation effect, can be used for Soft Ground under water under the situation that does not adopt strong rammer.Compare with traditional technique of soft soil foundation treatment, have the construction period short, save that material, consolidation effect are good, advantage such as cleanliness without any pollution, cost are low.
Concrete application example of the present invention is as follows:
Be treated to example with the safe chemical project subgrade in new Jiang Hua, Yingkou City, Shandong.This project district is the rectangular area, long 275m, wide 222m.Be on the verge of the Bohai Sea, apart from the about 500m in sea.This object of construction production zone be on former mud matter silty clay soil layer hydraulic reclamation one deck silty clay soil, thickness is 2~3m, intends this hydraulic reclamation soil body is reinforced, the silty clay soil layer is weak, can not allow large-scale construction equipment to march into the arena and construct, and construction period is very tight.In order to guarantee carrying out smoothly of project, through multi-argument, discussion, decision adopts no sealed vacuum pre-pressing and strong tamping method to handle, because the place design bearing capacity is less demanding, so do not adopt dynamic consolidation construction after the vacuum preloading processing finishes.
The place is provided with is responsible for spacing 2.5m, and chimney filter spacing 1.5m is for water, the gas of blocking stabilization zone and non-stabilization zone are got in touch, and guarantee the retaining of sealing ditch, and must build the cofferdam all around in the place, highly about 50~80cm is built in the cofferdam, employing is filled the sand hill of barged-in fill and is built, cofferdam total length 1000m.Because the weak soil layer is positioned at top layer, and buried depth is more shallow, has taked to lay one deck vacuum diaphragm and then vacuum diaphragm has been buried underground method in the weak soil layer.The whole district has arranged 110 vacuum pumps altogether.
Examination vacuumizes 4d increases vacuum pump workbench number then gradually.After vacuum reaches 60kPa, does not have gas leak phenomenon on inspection, begin to build cofferdam face retaining, and drive all vacuum pumps of foot, vacuum under the film is brought up to greater than 80kPa.At this moment, the timing of beginning dead load vacuumizes 16d.Handle the groundwork characteristic load bearing capacity greater than 60kPa.
This project adopts no sealed vacuum preloading, and the duration shortens nearly 1/2~2/3 than conventional construction method, and cost is saved 1/2 of former budget.

Claims (8)

1. one kind is not had sealing fast vacuum prepressing dynamic compaction, it is characterized in that including following steps:
1) determines stratum condition according to the place exploration data, arrange filter opening according to stratum condition;
2) chimney filter is plugged into the stratum by projected depth, the chimney filter upper end is exposed soil layer and directly is connected with the person in charge, is responsible for then directly to be connected with vaccum-pumping equipment and carries out vacuum preloading construction.
3) vacuumize with vaccum-pumping equipment, under the effect of inside and outside differential pressure, the water in the weak viscous soil horizon is inhaled into chimney filter, and rises along chimney filter, discharges by being responsible for, up to meeting design requirement.
2. nothing according to claim 1 sealing fast vacuum prepressing dynamic compaction is characterized in that above-mentioned steps 3) finish after, if the treatment of soft foundation requirement for bearing capacity is not high, dismountable main chimney filter and vacuum extractor when meeting design requirement, construction of soft soil treatment finishes; If the treatment of soft foundation requirement for bearing capacity is higher, when the weak soil sedimentation tends towards stability, will pull out one section on the chimney filter, the perforate chimney filter is in the non-weak viscous soil horizon as far as possible; Layout at pipeline enclosure then and ram by force, chimney filter is used as the drainage channel of non-weak viscous soil horizon, thereby effectively reinforce non-weak viscous soil horizon, and make weak viscous soil horizon obtain further densification, soil layer reaches the bearing capacity of design.
3. nothing sealing fast vacuum prepressing dynamic compaction according to claim 1, it is characterized in that the chimney filter section of above-mentioned chimney filter in weak viscous soil horizon open filter opening, and with nonwoven parcel, and reserve one section not perforate chimney filter, the bottom sealing of chimney filter according to the soil layer settling amount.
4. nothing sealing fast vacuum prepressing dynamic compaction according to claim 1, it is characterized in that above-mentioned chimney filter handling more shallow stratum of mud buried depth or stratum water content height constantly, can use the chimney filter of whole perforates, build envelope wall with colluding the method for mixing around in the place, perhaps bury one deck diaphragm seal underground reach sealing in the mud effect.
5. nothing sealing fast vacuum prepressing dynamic compaction according to claim 1 is characterized in that above-mentioned steps 2) machine is colluded in use or board-plugging device plugs chimney filter into the stratum by projected depth.
6. nothing according to claim 1 sealing fast vacuum prepressing dynamic compaction is characterized in that above-mentioned chimney filter made by pvc pipe.
7. nothing sealing fast vacuum prepressing dynamic compaction according to claim 1 is characterized in that the treatment effect of subgrade can be realized by adjusting master, chimney filter spacing and changing vacuum pump quantity.
8. nothing sealing fast vacuum prepressing dynamic compaction according to claim 1 is characterized in that not needing to lay sand cushion in the subgrade processing procedure.
CNB2007100295455A 2007-08-01 2007-08-01 A kind of nothing sealing fast vacuum prepressing method Expired - Fee Related CN100549304C (en)

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CN101818494A (en) * 2010-04-28 2010-09-01 郭艳景 Soft soil foundation treatment method by three-dimensional drainage power pre-pressing consolidation
CN101871209A (en) * 2010-07-07 2010-10-27 广州市盛洲地基基础工程有限公司 Vacuum preloading method without sealing film
CN101886384A (en) * 2010-07-07 2010-11-17 广州市盛洲地基基础工程有限公司 Vacuum and dynamic compaction synchronization method
CN102330424A (en) * 2011-07-05 2012-01-25 浙江广川咨询有限公司 Vacuum preloading consolidation method for duplex vacuum tube well of blowing filling soft soil
CN103243703A (en) * 2013-04-18 2013-08-14 浙江大学宁波理工学院 Soft soil consolidation processing method by utilizing hard hollow tubes with pores reserved on side walls
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CN101871209A (en) * 2010-07-07 2010-10-27 广州市盛洲地基基础工程有限公司 Vacuum preloading method without sealing film
CN101886384A (en) * 2010-07-07 2010-11-17 广州市盛洲地基基础工程有限公司 Vacuum and dynamic compaction synchronization method
CN102330424B (en) * 2011-07-05 2013-11-13 浙江广川工程咨询有限公司 Vacuum preloading consolidation method for duplex vacuum tube well of blowing filling soft soil
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