CN104895046B - A kind of different depth disturbance combines the soft-soil foundation treatment method of discharging consolidation - Google Patents
A kind of different depth disturbance combines the soft-soil foundation treatment method of discharging consolidation Download PDFInfo
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Abstract
The invention discloses a kind of different depth disturbance and combine the soft-soil foundation treatment method of discharging consolidation, including accelerating multiple displacement hulls of pending soft soil body discharging consolidation in squeezing into the pending soft soil body by projected depth requirement, and many disturbance media lines and the special-purpose machinery of disturbance medium is provided for disturbance media lines；Displacement hull is plastic draining board or sand wick；Having aperture on disturbance media lines, soft-soil foundation treatment method specifically includes following steps: levelling of the land, sets displacement hull, soil body initial disturbance, use piling prepressing or the pending soft soil body is pressurizeed by vacuum prepressing device, as required the pending soft soil body is carried out repeatedly disturbance and construction terminates.The present invention by disturbance different depth soil body raising infiltration coefficient, thus can accelerate soil solidifying speed, the intensification soil body process degree of depth, minimizing soil body long-term creep, reduce top preloading reduction expense.
Description
Technical field
The invention belongs to technical field of civil engineering, particularly relate to be applied to a kind of method for processing foundation of Soft Ground, a kind of different depth disturbance combines the soft-soil foundation treatment method of discharging consolidation.
Background technology
The process of soft soil foundation is frequently problem in Process of Engineering Construction, and wherein for soft soil foundation, high-moisture, high void ratio and the high flow plastic weak soil that particularly China's southeastern coast is common, draining concretion method is a kind of conventional method for processing foundation.Principle of effective stress and One-dimensional Consolidation Theory that draining concretion method proposes in nineteen twenty-five according to Tai Shaji (Terzaghi) grow up, its mechanism is by arranging the vertical drainage body such as sand drain or plastic draining board, the pore water in soil layer is made mainly to be discharged by vertical drainage body from horizontal direction, thus increase the draining water way of soil layer, shorten drainage distance, under load action, accelerate soil body discharging consolidation, make the soil body that bigger sedimentation to occur at short notice, thus improve soil strength as early as possible, reduce settlement after construction.According to this principle, engineering practice afterwards develops the concrete processing method such as drain bar (sand drain) piling prepressing, drain bar (sand drain) vacuum preloading in succession.This method is widely applied at airport, China's Coastal Areas, highway and enclosing in a large number in the basement process of painting place, seabeach, and achieves good effect.
Engineering practice shows, although preloading or vacuum preloading draining concretion method are a kind of relatively inexpensive and effective soft base processing methods, but also has bigger limitation.It being mainly manifested in: 1) prior art is a kind of technology processed to deep under ground by earth's surface, but owing to the index of additional stress transmission weakens again, the process degree of depth making prior art is limited, general discharging consolidation preloading method effectively processes the degree of depth less than 15m, the economic treatment degree of depth is typically within 10m, as deep soil to be processed, its fund cost and time cost will quickly increase.2) time is processed longer.Although discharging consolidation preloading method accelerates ground consolidation by precompressed, but owing to processing the reasons such as soil body osmotic coefficient is minimum, reach requirement sedimentation and generally require the time that some months is the most longer.3) the follow-up soil body still long-term creep, settlement after construction are bigger.Discharging consolidation preloading method settlement after construction, essentially from the deep layer weak soil that can not effectively process, causes project to build up rear lower weak soil still long Compression Settlement.The main cause causing drawbacks described above is: owing to preloading or vacuum preconsolidation method are a kind of processing methods from the superficial to the deep, therefore it as required effectively and the processing bottom soft layer that hope processes, cannot effectively process deep weak soil of low cost, thus cannot cause the problem that cost is high and treatment effect is the best.
Summary of the invention
The technical problem to be solved is the present situation for above-mentioned prior art, and provide and can improve effective stress in infiltration coefficient and soil by the initiative input disturbance medium disturbance different depth soil body, thus accelerate soil solidifying speed, deepen the soil body process the degree of depth, reduce soil body long-term creep, reduce top preloading, a kind of different depth disturbance of reducing expense combines the soft-soil foundation treatment method of discharging consolidation.
The present invention solves the technical scheme that above-mentioned technical problem used: a kind of different depth disturbance combines the soft-soil foundation treatment method of discharging consolidation, including accelerating multiple displacement hulls of pending soft soil body discharging consolidation in squeezing into the pending soft soil body by projected depth requirement, and many disturbance media lines for the ejection turbulence pending soft soil body of medium initiative disturbance and the special-purpose machinery of disturbance medium is provided for disturbance media lines；Displacement hull is plastic draining board or sand wick etc.；The aperture of disturbance medium orientation churning is had on disturbance media lines, the method of disturbance medium churning is to set according to clay distribution situation, makes disturbance medium form large range of spirality or cone or the Mach stem of other three-dimensional shapes or body in the pending soft soil body；Soft-soil foundation treatment method specifically includes following steps:
1), levelling of the land: carrying out smooth to pending soft soil body place, and excavate out the convenient gutter discharged in time by place water at place periphery simultaneously, place is most preferably formed with certain drainage grade；
2) displacement hull, is set: by design requirement uniform displacement hull distributed points position of choosing in place, then on each distributed points position, beat the displacement hull of plastic draining board or sand wick to projected depth；
3), sand bedding course is laid: the most uniformly laying sand bedding course, the thickness of sand bedding course is at 30cm to 50cm, and makes the draining termination of displacement hull extend into 10cm to 25cm in sand bedding course；
4), soil body initial disturbance: using special-purpose machinery to make disturbance medium by disturbance media lines churning, utilize disturbance medium that the soft soil body is carried out initiative disturbance, the initial depth of disturbance and the end degree of depth and disturbance pass are by design requirement；
5), use piling prepressing or vacuum prepressing device that the pending soft soil body is pressurizeed；
7), utilize disturbance medium that by transfer or pre-buried passage, the pending soft soil body is carried out repeatedly disturbance as required；
6), construction terminates.
For optimizing technique scheme, the measure taked also includes:
Above-mentioned special-purpose machinery is high-pressure pump, and above-mentioned disturbance medium is water under high pressure or other solid-liquid media.
Above-mentioned special-purpose machinery is air compressor, and above-mentioned disturbance medium is pressure-air.
The thickness of above-mentioned sand bedding course extend into 15cm to 20cm in sand bedding course in 30-50cm, the draining termination of displacement hull.
Above-mentioned sand bedding course is the drainage layer formed by the medium coarse sand laid.
When using vacuum prepressing device, sand bedding course is equipped with diaphragm seal.
Compared with prior art, the present invention can be according to pending soft soil body on-site actual situations, use the disturbance medium such as gases at high pressure or water under high pressure to the pending soil body, carry out the initiative disturbance of different depth, and combine conventional drainage consolidation preloading method define a kind of novel soft foundation treatment technology, by the present invention in that pressure-air or water or other media form large range of spirality or cone or the Mach stem of other three-dimensional shapes or body in the soft soil body, the Mach stem degree of depth, number of times can be according to field condition unrestricted choice.The soil mass crack face of disturbance formation or body, can be greatly improved the permeance property of Soft Soil Layer；The pore water pressure that gases at high pressure or other media will increase in the soil body in the soil body simultaneously, further speeds up the consolidation of the soil body；Can be greatly reduced in the most disturbed soil body mechanical performance index short time cut through, upper overburden layer deadweight can produce the effect that similar additional stress increases, and further accelerates the discharging consolidation of the cut soil body.The present invention effectively changes the former technology of soft soil body processing method from the superficial to the deep, and the soil body therefore can be selected neatly to process the degree of depth, can from the superficial to the deep, can also by go deep into shallow, even processed to upper and lower two ends by middle part, can unrestricted choice as required.The present invention by disturbance different depth soil body raising infiltration coefficient, thus can accelerate soil solidifying speed, the intensification soil body process degree of depth, minimizing soil body long-term creep, reduce top preloading reduction expense.
Accompanying drawing explanation
Fig. 1 is the principle schematic that the present invention combines piling prepressing；
Fig. 2 is the principle schematic that the present invention combines vacuum prepressing device；
Fig. 3 is the displacement hull floor plan with disturbance point of the square distribution of the present invention；
Fig. 4 be the present invention be the floor plan of displacement hull and the disturbance point of equilateral triangle distribution.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
Fig. 1 to Fig. 4 is the structural representation of the present invention.
Reference therein is: pending soft soil body T, displacement hull 1, draining termination 11, disturbance point 2, sand bedding course 3, preloading 4, vacuum prepressing device 5, pre-buried passage 6, diaphragm seal 7, gutter 8.
As shown in Figures 1 to 4, a kind of different depth disturbance of the present invention combines the soft-soil foundation treatment method of discharging consolidation, including accelerating multiple displacement hulls 1 of pending soft soil body T discharging consolidation in squeezing into pending soft soil body T by projected depth requirement, and many disturbance media lines for the pending soft soil body T of ejection turbulence medium initiative disturbance and the special-purpose machinery of disturbance medium is provided for disturbance media lines；Displacement hull 1 is plastic draining board or sand wick；The aperture of disturbance medium orientation churning is had on disturbance media lines, the method of disturbance medium churning is to set according to clay distribution situation, makes disturbance medium form large range of spirality or cone or the Mach stem of other three-dimensional shapes or body in pending soft soil body T；Soft-soil foundation treatment method specifically includes following steps:
1), levelling of the land: carrying out smooth to pending soft soil body T place, and excavate out the convenient gutter 8 discharged in time by place water at place periphery simultaneously, place is most preferably formed with certain drainage grade；
2) displacement hull, is set: by design requirement uniform displacement hull 1 distributed points position of choosing in place, then on each distributed points position, by the displacement hull 1 dozen of plastic draining board or sand wick to projected depth；
3) sand bedding course, is laid: the most uniformly laying sand bedding course 3, the thickness of sand bedding course 3 is at 30cm to 50cm, and makes the draining termination 11 of displacement hull 1 extend into 10cm to 25cm in sand bedding course 3；
4), soil body initial disturbance: using special-purpose machinery to make disturbance medium by disturbance media lines churning, utilize disturbance medium that the soft soil body is carried out initiative disturbance, the initial depth of disturbance and the end degree of depth and disturbance pass are by design requirement；
5), use preloading 4 precompressed or vacuum prepressing device 5 that the pending soft soil body is pressurizeed；
6), utilize disturbance medium that by transfer or pre-buried passage 6, pending soft soil body T is carried out repeatedly disturbance as required；
7), construction terminates.
The present invention can be according to pending soft soil body T on-site actual situations, use disturbance medium that the pending soil body carries out the initiative disturbance of different depth, making disturbance medium form large range of spirality or cone or the Mach stem of other three-dimensional shapes or body in the soft soil body, the Mach stem degree of depth, number of times can be according to field condition unrestricted choice.The soil mass crack face of disturbance formation or body, can be greatly improved the permeance property of Soft Soil Layer；The pore water pressure that gases at high pressure or other media will increase in the soil body in the soil body simultaneously, further speeds up the consolidation of the soil body.The present invention effectively changes the former technology of soft soil body processing method from the superficial to the deep, and the soil body therefore can be selected neatly to process the degree of depth, can from the superficial to the deep, can also by go deep into shallow, even processed to upper and lower two ends by middle part, can unrestricted choice as required.The present invention by disturbance different depth soil body raising infiltration coefficient, thus can accelerate soil solidifying speed, the intensification soil body process degree of depth, minimizing soil body long-term creep, reduce top preloading reduction expense.Disturbance point 2 described in figure of the present invention is the some position of follow-up repeatedly disturbance pre-buried pre-buried passage when being piling prepressing.
Embodiment 1
A kind of different depth disturbance of the present invention combines the soft-soil foundation treatment method of discharging consolidation, including accelerating multiple displacement hulls 1 of pending soft soil body T discharging consolidation in squeezing into pending soft soil body T by projected depth requirement, and many disturbance media lines for the pending soft soil body T of ejection turbulence medium initiative disturbance and the special-purpose machinery of disturbance medium is provided for disturbance media lines；Displacement hull 1 is plastic draining board or sand wick；Disturbance medium is according to pending soft soil body T on-site actual situations, select water under high pressure or other solid-liquid medium or pressure-air, when disturbance medium selects water under high pressure or other solid-liquid media, the special-purpose machinery providing disturbance medium is then high-pressure pump, when disturbance medium is pressure-air, it is provided that the special-purpose machinery of disturbance medium is then air compressor.Disturbance media lines is a kind of special conduit, disturbance medium is sprayed by disturbance media lines, pending soft soil body T is carried out the initiative disturbance of different depth, the aperture of disturbance medium orientation churning is had on disturbance media lines, the method of disturbance medium churning is to set according to clay distribution situation, makes the disturbance medium such as water under high pressure or pressure-air form large range of spirality or cone or the Mach stem of other three-dimensional shapes or body in pending soft soil body T；The Mach stem degree of depth and disturbance number of times can be according to field condition unrestricted choice, and soft-soil foundation treatment method specifically includes following steps:
1), levelling of the land: carrying out smooth to pending soft soil body T place, and excavate out the convenient gutter 8 discharged in time by place water at place periphery simultaneously, place is most preferably formed with certain drainage grade；Drainage grade can be at 5 degree to 10 degree.
2), displacement hull is set: requirement is uniform in place chooses displacement hull 1 distributed points position by designing, displacement hull 1 is made to be distributed in equilateral triangle in place, then on each distributed points position, by the displacement hull 1 dozen of plastic draining board or sand wick to projected depth；Projected depth is the degree of depth that pending soft soil body T needs discharging consolidation；
3) sand bedding course, is laid: the most uniformly laying sand bedding course 3, the thickness of sand bedding course 3 is at 40cm, and makes the draining termination 11 of displacement hull 1 extend into 15cm to 20cm in sand bedding course 3；Sand bedding course 3 is to use medium coarse sand to lay the drainage layer formed；
4), soil body initial disturbance: use high-pressure pump or air compressor to make water under high pressure or pressure-air or other media through disturbance media lines churning, utilizing water under high pressure or pressure-air that the soft soil body is carried out initiative disturbance, the initial depth of disturbance and the end degree of depth and disturbance pass are by design requirement；
5), use preloading 4 precompressed or vacuum prepressing device 5 that the pending soft soil body is pressurizeed.When using vacuum prepressing device 5, sand bedding course 3 is equipped with diaphragm seal 7.
6), utilize disturbance medium that by transfer or pre-buried passage, pending soft soil body T is carried out repeatedly disturbance as required；
7), construction terminates.
Embodiment two
It is by utilizing the disturbance medium such as gases at high pressure or water under high pressure or other solid-liquid medium that pending soft soil body T carries out the initiative disturbance of different depth according to on-site actual situations that a kind of different depth disturbance of the present invention combines the soft-soil foundation treatment method of discharging consolidation, and combine conventional drainage consolidation preloading method, realize the soft soil body and accelerate a kind of Novel foundation treatment method of discharging consolidation, it accelerates multiple displacement hulls 1 of pending soft soil body T discharging consolidation in including squeezing into pending soft soil body T by projected depth requirement, and many for spray gases at high pressure or the disturbance media lines of the pending soft soil body T of water under high pressure disturbance medium initiative disturbance and for disturbance media lines provide disturbance medium special-purpose machinery；Displacement hull 1 is plastic draining board or sand wick；The special-purpose machinery providing disturbance medium is air compressor or high-pressure pump, disturbance media lines is a kind of special conduit, water under high pressure or pressure-air carry out the initiative disturbance of different depth by disturbance media lines to pending soft soil body T, the aperture of disturbance medium orientation churning is had on disturbance media lines, the method of disturbance medium churning is to set according to clay distribution situation, makes water under high pressure or pressure-air form large range of spirality or cone or the Mach stem of other three-dimensional shapes or body in pending soft soil body T；The Mach stem degree of depth and disturbance number of times can be according to field condition unrestricted choice, and soft-soil foundation treatment method specifically includes following steps:
1), levelling of the land: carrying out smooth to pending soft soil body T place, and excavate out the convenient gutter 8 discharged in time by place water at place periphery simultaneously, place is most preferably formed with certain drainage grade；Drainage grade can be below 5 degree.
2) displacement hull, is set: requirement is uniform in place chooses displacement hull 1 distributed points position by designing, and makes displacement hull 1 square distribution in place, then on each distributed points position, by the displacement hull 1 dozen of plastic draining board or sand wick to projected depth；Projected depth is the degree of depth that pending soft soil body T needs discharging consolidation；
3) sand bedding course, is laid: the most uniformly laying sand bedding course 3, the thickness of sand bedding course 3 is at 40cm, and makes the draining termination 11 of displacement hull 1 extend into 15cm to 20cm in sand bedding course 3；Sand bedding course 3 is to use medium coarse sand to lay the drainage layer formed；
4), soil body initial disturbance: use high-pressure hydraulic pump or air compressor to make water under high pressure or pressure-air through disturbance media lines churning, utilizing water under high pressure or pressure-air that the soft soil body is carried out initiative disturbance, the initial depth of disturbance and the end degree of depth and disturbance pass are by design requirement；
5), use preloading 4 precompressed or vacuum prepressing device 5 that the pending soft soil body is pressurizeed, should be the pre-buried passage of subsequent perturbations when using piling prepressing；When using vacuum prepressing device 5, sand bedding course 3 is equipped with diaphragm seal 7.
6), utilize disturbance medium that by transfer or pre-buried passage, pending soft soil body T is carried out repeatedly disturbance as required；
7), construction terminates.
By the present invention in that pressure-air or water or other media form large range of spirality or cone or the Mach stem of other three-dimensional shapes or body in the soft soil body, the Mach stem degree of depth, number of times can be according to field condition unrestricted choice.The soil mass crack face of disturbance formation or body, can be greatly improved the permeance property of Soft Soil Layer；The pore water pressure that gases at high pressure or liquid will increase in the soil body in the soil body simultaneously, further speeds up the consolidation of the soil body；Can be greatly reduced in the most disturbed soil body mechanical performance index short time cut through, upper overburden layer deadweight can produce the effect that similar additional stress increases, and further accelerates the discharging consolidation of the cut soil body.The present invention effectively changes the former technology of soft soil body processing method from the superficial to the deep, and the soil body therefore can be selected neatly to process the degree of depth, can from the superficial to the deep, can also by go deep into shallow, even processed to upper and lower two ends by middle part, can unrestricted choice as required.The present invention efficiently solves the deficiency of former technology, and this is the basic innovation in theory；Meanwhile, this technical costs is cheap, can spread, the present invention can improve infiltration coefficient by the disturbance different depth soil body, thus accelerate soil solidifying speed, deepen the soil body and process the degree of depth, reduce soil body long-term creep, reduce top preloading and reduce expense.
Highly preferred embodiment of the present invention is elucidated with, those of ordinary skill in the art the various changes made or remodeling are all without departing from the scope of the present invention.
Claims (1)
1. a different depth disturbance combines the soft-soil foundation treatment method of discharging consolidation, it is characterized in that: include squeezing into the multiple displacement hulls (1) accelerating the pending soft soil body (T) discharging consolidation in the pending soft soil body (T) by projected depth requirement, and many disturbance media lines being used for spraying the water under high pressure disturbance pending soft soil body of medium initiative disturbance (T) and the special-purpose machinery of disturbance medium is provided for disturbance media lines；Displacement hull (1) is plastic draining board or sand wick；The special-purpose machinery providing disturbance medium is high-pressure hydraulic pump, water under high pressure carries out the initiative disturbance of different depth by disturbance media lines to the pending soft soil body (T), the aperture of disturbance medium orientation churning is had on disturbance media lines, the method of disturbance medium churning is to set according to clay distribution situation, makes water under high pressure form large range of spirality or cone interfering body in the pending soft soil body (T)；The Mach stem degree of depth and disturbance number of times can be according to field condition unrestricted choice, and soft-soil foundation treatment method specifically includes following steps:
1), levelling of the land: carrying out smooth to the pending soft soil body (T) place, and excavate out the convenient gutter (8) discharged in time by place water at place periphery simultaneously, place is formed with certain drainage grade；Drainage grade is below 5 degree；
2), displacement hull is set: requirement is uniform in place chooses displacement hull (1) distributed points position by designing, make displacement hull (1) square distribution in place, then, on each distributed points position, displacement hull (1) is beaten to projected depth；Projected depth is the degree of depth that the pending soft soil body (T) needs discharging consolidation；
3), sand bedding course is laid: the most uniformly lay sand bedding course (3), the thickness of sand bedding course (3) is at 40cm, and makes the draining termination (11) of displacement hull (1) extend into 15cm to 20cm in sand bedding course (3)；Sand bedding course (3) is to use medium coarse sand to lay the drainage layer formed；
4), soil body initial disturbance: using high-pressure hydraulic pump to make water under high pressure through disturbance media lines churning, utilize water under high pressure that the soft soil body is carried out initiative disturbance, the initial depth of disturbance and the end degree of depth and disturbance pass are by design requirement；
5), use preloading (4) precompressed or vacuum prepressing device (5) that the pending soft soil body is pressurizeed, should be the pre-buried passage of subsequent perturbations (6) when using piling prepressing；When using vacuum prepressing device (5), sand bedding course (3) is equipped with diaphragm seal (7)；
6), utilize disturbance medium that by transfer or pre-buried passage, the pending soft soil body (T) is carried out repeatedly disturbance as required；
7), construction terminates.
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| CN109056694B (en) * | 2018-08-10 | 2021-05-18 | 吴慧明 | Method for treating dredger fill through combination of shearing pressurization and vacuum preloading |
| CN109653186B (en) * | 2019-01-21 | 2020-12-22 | 吴慧明 | Soft soil foundation treatment method combining local vacuum with high-pressure aerosol disturbance |
| CN112081090A (en) * | 2020-06-12 | 2020-12-15 | 山西机械化建设集团有限公司 | Foundation treatment method for sludge layer under deep backfilled gravel soil by high-pressure water-gas replacement |
| CN112176806B (en) * | 2020-10-16 | 2021-10-29 | 于胜泉 | Stable road soft foundation treatment method and matched soft foundation treatment construction system |
| CN112459043A (en) * | 2020-12-10 | 2021-03-09 | 中铁四局集团第一工程有限公司 | Three-dimensional disturbance type vacuum preloading foundation treatment system |
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| JP5433885B1 (en) * | 2012-12-11 | 2014-03-05 | 強化土株式会社 | Ground improvement method |
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| CN1683718A (en) * | 2004-08-05 | 2005-10-19 | 铁道科学研究院 | Draining and reinforcing treating method for soft soil foundation |
| CN1664245A (en) * | 2005-04-01 | 2005-09-07 | 东南大学 | Operation method for consolidating soft soil foundation by pneumatic flerry vacuum preloading method |
| CN103437338A (en) * | 2013-08-28 | 2013-12-11 | 东南大学 | Reinforcing dredger fill foundation construction method combining drainage well and air pressure splitting |
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