CN101514548B - Method for increasing the bearing capacity of consolidated soil - Google Patents
Method for increasing the bearing capacity of consolidated soil Download PDFInfo
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- CN101514548B CN101514548B CN2009100480277A CN200910048027A CN101514548B CN 101514548 B CN101514548 B CN 101514548B CN 2009100480277 A CN2009100480277 A CN 2009100480277A CN 200910048027 A CN200910048027 A CN 200910048027A CN 101514548 B CN101514548 B CN 101514548B
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Abstract
The invention relates to a method for increasing the bearing capacity of consolidated soil. Firstly, the sealing anti seepage treatment is carried out on the periphery of a region to be treated according to the need, and then a drain bar is inserted, beaten and fixed with an electrical conductor in advance. After that, a vacuum system is laid, after the surface is leveled and cleared, a diaphragm seal is paved, and then a luting layer is bow-filled for complex closeness. Finally, evacuation precompression is carried out. After the evacuation negative pressure operation is carried out for 30-40 days, the electro-osmosis operation is carried out, and simultaneously the evacuation negative pressure operation is continously carried out. The method causes that the pore water in sludge which is difficult to be exhausted by the conventional negative pressure flows to a cathode from an anode under the action of electric field force, and then the water is discharged from the cathode by a plastic drain bar rather than to be supplemented in the anode. A majority of pore water can be quickly discharged out of the sludge by the method, thus effectively shortening the consolidation time of the sludge and increasing the bearing capacity of consolidated soil.
Description
The method field
The present invention relates to the correlation technique field of engineerings such as Soft Ground, the fixed soil building processing of mud (or dregs), a kind of specifically method that improves bearing capacity of consolidated soil.
Background method
At present domestic mainly fixed at soft foundation, what often adopted in engineering fields such as the fixed soil building of mud (or dregs) is low-position vacuum method or electroosmotic drainage.
The low position vacuum preloading method is gained the name because of horizontal pipe network is located under the hydraulic reclamation mudding layer.Utilize the low-position vacuum system to vacuumize and make and under the mudding layer, keep about 80kN/m for a long time
2The high vacuum negative pressure, under the synergy of the additional prefabricating load that huge suction that negative pressure of vacuum causes and mudding layer cause, the most of pore water in the weak soil is more promptly discharged by plastic draining board, horizontal chimney filter net, ground weak soil generation compression concretion, simultaneously, the mudding layer is also finished the fixed of self gradually, reaches two big purposes of consolidated subsoil weak soil and barged-in fill.General vacuum suction can be finished the fixed of mud in 2～3 months.
The characteristics of low position vacuum preloading method are that technology is simple, the method maturation, cost is relatively low, and consolidation process does not change soil mass property, can not cause secondary pollution, but the mud bearing capacity that this method was disposed all can only reach 60～70kpa (about 90 days of pumpdown time), the fixed soil after the disposal can only be confined to the lower greening of requirement for bearing capacity, the depression is filled and led up with aspects such as soil, and can not be used to fill out base and building lot etc., but availability is not high.
Electroosmotic drainage is meant to be inserted metal electrode and passes to direct current in the saturated soft clay ground, because the DC electric field effect, the moisture in the soil flows to negative electrode from anode.Water is got rid of (adopt well-points dewatering as negative electrode usually, and carry out vacuum by the well point and draw water) from negative electrode, and do not allow water near anode, replenish, can get rid of water in soil gradually by electroosmosis.Thereby strengthen the fixed of ground, improve foundation strength.According to the character of soft subgrade soil, select electrode material, the optional reinforcing bar of electrode material, aluminium bar, iron staff etc., the anode of iron and aluminium is decomposed and participates in the electrochemistry sclerous reaction in the electric osmose process, and the gain in strength of soil is surpassed only by the fixed intensity that can increase.But the electroosmotic drainage power consumption is high.
Given this, in fact be necessary to provide a kind of new method to be used to improve bearing capacity of consolidated soil, energy conservation when shortening fixed duration.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of raising bearing capacity of consolidated soil, the job practices of energy conservation when shortening fixed duration.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of method that improves bearing capacity of consolidated soil, and this method may further comprise the steps:
At first, the zone that handle being sealed antiseepage to periphery as required handles;
Then, insert and to beat plastic draining board, predetermined fixed electric conductor or plastic draining board and electric conductor produced the zone that the composite material insertion will be handled in advance on each plastic draining board;
After electric conductor and electrode network connected, electrode network one end was connected with the electric osmose instrument;
Then lay vacuum system, vacuum diaphragm is laid in the region surface leveling cleaning back that will handle, and hydraulic reclamation mudding layer carries out compound airtight again;
Vacuumize precompressed at last, vacuumize negative-pressure operation after, beginning electric osmose operation connects both positive and negative polarity respectively to the electric conductor on every adjacent two plastic removal material band drains; After energising a period of time, give the electrode of the electric conductor exchange on the two whenever adjacent plastic removal material band drains.
As one of preferred version of the present invention, electric conductor is identical with plastic draining board length.
As one of preferred version of the present invention, the bending of electric conductor exposed parts is used to prevent to poke vacuum diaphragm.
As one of preferred version of the present invention, described vacuumize negative-pressure operation 30-40 days after, beginning electric osmose operation.
The present invention is on the basis of low position vacuum preloading method, when the pore water in the mud can not be discharged by conventional negative-pressure operation, every two adjacent electric conductors of arranging on the band drains (electric conductor is fixed on each band drain in advance, inserts in the mud together with band drain) are connect both positive and negative polarity respectively; After energising a period of time, give every two adjacent electric conductor exchange electrodes of arranging on the band drains.Under the electric field force effect, the water in the soil flows to cathode from anode, then water is discharged by plastic draining board from cathode, and does not allow water replenish at anode.Most of pore water can be discharged outside the mud fast by the method.
Characteristics of the present invention are:
(1) combine electroosmotic drainage and low position vacuum preloading method simultaneously, this method is disposed about 60～80 days of mud time, has effectively shortened the silt consolidation processing time, makes the soil that takies to utilize as early as possible again.
(2) band drain and electric conductor can be used as a kind of composite material, and this composite material has the dual-use function of draining and conduction simultaneously.This material technology is simple, band drain and electric conductor insert in the mud together in the time of can realizing large-scale mass production and construction in processing factory, reduce other electroosmosis method so on the one hand and produced the production link of electric conductor separately, also saved the cost of manually burying electric conductor separately underground on the other hand.
(3) compare with simple low position vacuum preloading method, change under the little situation in cost, bearing capacity is corresponding to improve a lot, with respect to present domestic chemosetting method, investment reduces greatly, and does not change soil mass property, it is more extensive to dispose the bed mud purposes, good economy performance.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
The specific embodiment
Further specify concrete implementation step of the present invention below in conjunction with accompanying drawing:
Please refer to shown in Figure 1, a kind of method that improves bearing capacity of consolidated soil, at first, construction box dam 3 is (when the sealant end face flushes with ground on original ground 1, can not establish box dam), periphery is sealed antiseepage handle, insert the mud that needs to handle, dregs 2 etc. then, when plugging plastic draining board 4, will be fixed in advance on the band drain 4 with the common electric conductor 8 of length and insert together in the mud 2.The bending of electric conductor 8 exsertion part places prevents to poke vacuum diaphragm 12.Lay the horizontal drainage pipe network, described drainage pipeline networks comprises arm 6 and main 7, and electric conductor 8 usefulness electrode networks 9 are connected, and joint insulation processing, and be connected with electric osmose instrument 11 is blown mudding layer 5 at last, tests whether operate as normal of electric osmose instrument 11.Utilize negative pressure of vacuum system 10 to carry out the common negative-pressure operation that vacuumizes earlier during fixed beginning, 30～40 days pumpdown times, when Free water is discharged when reaching 60%～70% substantially, the operation of beginning electric osmose, negative pressure of vacuum operation is simultaneously proceeded.About about 20 days of electric osmose engineering time.
Wherein, also can be with band drain 4 and electric conductor 8 as a kind of composite material production, this composite material has the dual-use function of draining and conduction simultaneously; This material technology is simple, in processing factory can realize large-scale mass production and when construction band drain and electric conductor insert in the mud together, reduce other electroosmosis method so on the one hand and produced the production link of electric conductor separately, also saved the cost of manually burying electric conductor separately underground on the other hand.
The present invention is on the basis of low position vacuum preloading method, when the pore water in the mud can not be discharged by conventional negative-pressure operation, every two adjacent electric conductors of arranging on the band drains (electric conductor is fixed on each band drain in advance, inserts in the mud together with band drain) are connect both positive and negative polarity respectively; After energising a period of time, give every two adjacent electric conductor exchange electrodes of arranging on the band drains.Under the electric field force effect, the water in the soil flows to cathode from anode, then water is discharged by plastic draining board from cathode, and does not allow water replenish at anode.Most of pore water can be discharged outside the mud fast by the method.
Characteristics of the present invention are:
(1) combine electroosmotic drainage and low position vacuum preloading method simultaneously, this method is disposed about 60～80 days of mud time, has effectively shortened the silt consolidation processing time, makes the soil that takies to utilize as early as possible again.
(2) band drain and electric conductor can be used as a kind of composite material, and this composite material has the dual-use function of draining and conduction simultaneously.This material technology is simple, band drain and electric conductor insert in the mud together in the time of can realizing large-scale mass production and construction in processing factory, reduce other electroosmosis method so on the one hand and produced the production link of electric conductor separately, also saved the cost of manually burying electric conductor separately underground on the other hand.
(3) compare with simple low position vacuum preloading method, change under the little situation in cost, bearing capacity is corresponding to improve a lot, with respect to present domestic chemosetting method, investment reduces greatly, and does not change soil mass property, it is more extensive to dispose the bed mud purposes, good economy performance.
The foregoing description is the unrestricted method scheme of the present invention in order to explanation only.Any method scheme that does not break away from spirit and scope of the invention all should be encompassed in the middle of the patent claim of the present invention.
Claims (4)
1. a method that improves bearing capacity of consolidated soil is characterized in that, this method may further comprise the steps:
At first, the zone that handle being sealed antiseepage to periphery as required handles;
Then, insert and to beat plastic draining board, predetermined fixed electric conductor or plastic draining board and electric conductor produced the zone that the composite material insertion will be handled in advance on each plastic draining board;
After electric conductor and electrode network connected, electrode network one end was connected with the electric osmose instrument;
Then lay vacuum system, vacuum diaphragm is laid in the region surface leveling cleaning back that will handle, and hydraulic reclamation mudding layer carries out compound airtight again;
Vacuumize precompressed at last, vacuumize negative-pressure operation after, beginning electric osmose operation connects both positive and negative polarity respectively to the electric conductor on every adjacent two plastic removal material band drains; After energising a period of time, give the electrode of the electric conductor exchange on the two whenever adjacent plastic removal material band drains.
2. a kind of method that improves bearing capacity of consolidated soil according to claim 1 is characterized in that: electric conductor is identical with plastic draining board length.
3. a kind of method that improves bearing capacity of consolidated soil according to claim 1 is characterized in that: the bending of electric conductor exposed parts is used to prevent to poke vacuum diaphragm.
4. a kind of method that improves bearing capacity of consolidated soil according to claim 1 is characterized in that: described vacuumize negative-pressure operation 30-40 days after, beginning electric osmose operation.
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| CN2009100480277A CN101514548B (en) | 2009-03-23 | 2009-03-23 | Method for increasing the bearing capacity of consolidated soil |
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| CN2009100480277A CN101514548B (en) | 2009-03-23 | 2009-03-23 | Method for increasing the bearing capacity of consolidated soil |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101787691B (en) * | 2010-03-04 | 2011-04-27 | 张志铁 | Vacuum electrodynamics composite reinforced soil repairing method |
| CN102140793B (en) * | 2011-03-15 | 2012-07-25 | 中交天津港湾工程研究院有限公司 | Filter pipe tread-in vacuum drainage super-soft soil reinforcing technical method |
| CN102352621B (en) * | 2011-09-06 | 2013-03-27 | 南京瑞迪建设科技有限公司 | Three-dimensional circular water replenishing and repairing method of water-shortage polluted filed |
| CN102704463B (en) * | 2012-06-27 | 2015-02-18 | 河海大学 | Vacuum pre-compaction and electro-osmosis combined reinforcing device and method for muck foundation |
| CN104499497B (en) * | 2014-11-21 | 2017-01-18 | 朱奎 | Concrete brick-sandwiched folded plate foundation |
| CN107012854A (en) * | 2017-05-22 | 2017-08-04 | 江苏绿畅路面新材料有限公司 | A kind of batch production heavy metal mud water discharge method |
| CN112962571A (en) * | 2021-02-08 | 2021-06-15 | 广州市盛洲地基基础工程有限公司 | Device and method for reinforcing soft soil foundation by combining strong drainage and prepressing with electroosmosis |
| CN115140913A (en) * | 2022-08-01 | 2022-10-04 | 江苏省农业科学院 | Silt storage yard normal position dewatering system |
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