CN105649005B - GSZ joint grouting ultra-soft soil electric osmose construction method - Google Patents
GSZ joint grouting ultra-soft soil electric osmose construction method Download PDFInfo
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- CN105649005B CN105649005B CN201610052022.1A CN201610052022A CN105649005B CN 105649005 B CN105649005 B CN 105649005B CN 201610052022 A CN201610052022 A CN 201610052022A CN 105649005 B CN105649005 B CN 105649005B
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- gsz
- slip casting
- electric osmose
- iron pipe
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/005—Soil-conditioning by mixing with fibrous materials, filaments, open mesh or the like
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/11—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0084—Geogrids
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of GSZ joint grouting ultra-soft soil electric osmose construction method.Using Dredger Filling Engineering machinery blowing-filling sludge soil, reinforcement, top layer laying geotextiles are carried out to soft mud on mud top layer using GSZ；Slip casting iron pipe is laid as anode, negative electrode；Grouting pump and horizontal grouting conduit are connected by connecting valve, and horizontal grouting conduit and negative electrode, the slip casting iron pipe top of anode are connected；Lay main sewer and pumping equipment in the side for laying negative electrode in ultra-soft soil site；Switching on power carries out electric osmose.The present invention can improve the disengagement present situation of electrode and the soil body, effectively improve the effective electromotive force in electric osmose later stage, overall current intensity can be made to increase, drainage rates should also increase, compared with conventional electro-osmosis method treatment ultra-soft soil, GSZ strengthens the globality of the soil body, and slurry injection technique improves electric osmose later stage efficiency, and space filling can also effectively reduce differential settlement.
Description
Technical field
Reduce electric osmose the invention belongs to super soft ground processing technology field, more particularly to a kind of joint grouting of GSZ
Space and the drain reinforcing method of soil body globality and bearing capacity is improved between electrode and the soil body, be primarily suitable for coastal sludge matter
The field of engineering technology such as soil, reclaimed ground treatment.
Background technology
Coastal sludge matter soil, barged-in fill water content high, poor permeability, compressibility big, low bearing capacity and consolidation time is long.
With the demand of economy development of coastal area, the consolidation process demand of ultra-soft soil is also more and more.Compared to other traditional treatment
Method, electro-osmosis method possesses significant advantage, so being obtained extensively in coastal area when coastal soft clay and barged-in fill are reinforced in treatment
General application.
During the electric osmose practice of construction voltage-drop loading for a period of time after, larger sky can be formed between anode and the soil body
Gap, such that voltage of the practical function in soil body two ends is much smaller than electric power output voltage, so that strong influence electric osmose
The effect of reinforcing.Crack can excessively influence the globality of the soil body between the soil body and electrode after electric osmose, and then cause at soil stabilization
Differential settlement substantially, soil body globality poor after electric osmose is solved the problems, such as so needing badly and finding suitable method after reason.
In addition, GSZ technology gives birth to mutual rubbing action using muscle material as tension member with local products, limits the soil body
Lateral deformation, strengthen the globality of the soil body, so as to improve the shearing strength of the soil body, obtain extensively should in soil stabilization field
With.But when being used in the ultra-softs such as blowing-filling sludge soil soil, usually laid wherein as the course of construction surface with it
Using the consolidation method of precompressed after vertical drainage and horizontal drainage passage, but only GSZ cannot carry big machinery work
Industry, causes this method duration very long, and consolidation effect is difficult to meet time and design requirement.
The content of the invention
It is an object of the invention to overcome drawbacks described above, consider Fill Reinforced With Geogrids method and electro-osmosis method processes soft base skill
The advantage and disadvantage of art, while using grouting technique, a kind of GSZ joint grouting ultra-soft soil electric osmose construction method is proposed, to improve
Electro-osmosis method treatment effect.
To achieve the above object, present invention employs following technical scheme：
A kind of GSZ joint grouting ultra-soft soil electric osmose construction method,
（1）Using the silt soil of Dredger Filling Engineering machinery hydraulic reclamation design height half, existed using bamboo screen frame posture GSZ
Mud top layer carries out reinforcement, top layer laying geotextiles to soft mud；
（2）Using the silt soil of Dredger Filling Engineering machinery hydraulic reclamation one half height of residue, again using bamboo screen frame posture geotechnique's lattice
Grid carry out reinforcement to soft mud and lay geotextiles on top layer on mud top layer；
（3）Slip casting iron pipe is laid as anode according to design spacing in ultra-soft soil site side, in opposite side according to design
Spacing lays slip casting iron pipe as negative electrode；
（4）Grouting pump and horizontal grouting conduit connected by connecting valve, and by horizontal grouting conduit and negative electrode, anode
Slip casting iron pipe top connects, and when electrode is powered, slip casting iron pipe and grouting pump is disconnected；
（5）Main sewer and pumping equipment are laid in the side for laying negative electrode in ultra-soft soil site, and by inside GSZ
Horizontal aqueduct be connected with main sewer；
（6）Distinguish jointed anode and negative electrode to programmable power supply case with cable；
（7）Switching on power carries out electric osmose, when whiting, cracking and electrode occurs in the electrode perimeter soil body disengages phenomenon, temporarily
Close power supply, the space that the clay slurries that connection horizontal grouting conduit and grouting pump will have been configured are filled between electrode and the soil body
In；
（8）Repeat step（7）, until current reduction stops electric osmose to after threshold value.
In described clay slurries, clay is taken from outside construction site, and moisture content improves empty beneficial to the slurries presetting period is reduced
Gap filling effect.
Described GSZ is provided with the flexible water drainage pipe of water seepage hole, and adjacent flexible water drainage pipe interconnects composition
Grid.
The power supply is dc source, according to job site soil mass property, clay concentration of slurry, it is determined that the voltage for using and
Current strength.
Described slip casting iron pipe is vertically squeezed into the soil body perpendicular to Soft Clay Foundation surface, and driving depth is that basement process will
The depth asked.
Integrated welding connection technology is used between the horizontal grouting conduit and slip casting iron pipe, slip casting is provided with slip casting iron pipe
Hole, injected hole interlaced arrangement ensures that the filling of clay slurries is abundant.
Advantages of the present invention and effect are：
First：By using Fill Reinforced With Geogrids technology, the lateral deformation of the soil body is limited, strengthen the globality of the soil body, from
And improve treatment effect.Fortune of the moisture from anode to negative electrode when the horizontal drainage passage of integration is conducive to electric osmose in GSZ
Move, effectively improve place drainage by electroosmosis consolidation effect.
Second：Electrode is used as by iron Grouting Pipe, after producing space between electric osmose later stage iron pipe and the soil body, will be prepared
Clay slurries slip casting iron pipe is injected and by injected hole into space between electrode and the soil body by horizontal grouting conduit,
The disengagement present situation of electrode and the soil body can be improved, the effective electromotive force in electric osmose later stage is effectively improved, overall current intensity can be made to increase,
Drainage rates should also increase.
3rd：Clay slurries of the present invention, the moisture content of configuration rationally, reduces the slurries presetting period, improves empty
Gap filling effect.Clay take from construction site outside, using field resources reduces cost, and be not required to consider additive chemistry into
Divide the electric osmose effect and ambient influnence brought.
4th：Compared with conventional electro-osmosis method treatment ultra-soft soil, GSZ strengthens the globality of the soil body, and slurry injection technique is improved
Electric osmose later stage efficiency, space filling can also effectively reduce differential settlement.
The construction method is workable, is easy to quality control, GSZ joint grouting to improve electric osmose treatment ultra-soft soil
Effect is significant.
Brief description of the drawings
Fig. 1 is the construction scene graph of one embodiment of the present of invention；
Fig. 2 is the profile of horizontal grouting conduit and slip casting iron pipe；
In figure：1- ultra-soft soil sites, 2- anodes, 3- negative electrodes, 4- suction pumps, 5- programmable power supply casees, 6- grouting pumps, 7- clays
Mud, 8- GSZs, the horizontal aqueducts of 9-, 10- main sewers, 11- horizontal grouting conduits, 12- injected holes, 13- connection valves
Door.
Specific embodiment
Specific embodiment of the invention is described below in conjunction with accompanying drawing.Protection scope of the present invention is not limited to the present embodiment
Description.
The present invention successively lays GSZ in blowing-filling sludge soil, limits the lateral deformation of the soil body, strengthens the whole of the soil body
Body, so as to improve treatment effect.Hydraulic reclamation compensate for quick-discharging consolidation is carried out to ground using electro-osmosis method after certain altitude
GSZ and the time-consuming problem more long of preloading method are simply used, construction period has been ensured.Anodic-cathodic uses iron note simultaneously
Slurry pipe, after producing space between electric osmose later stage iron pipe and the soil body, the clay slurries that will be prepared are injected by horizontal grouting conduit
Slip casting iron pipe is simultaneously entered in the space between electrode and the soil body by injected hole, can effectively improve the effective electromotive force in electric osmose later stage
And electric current, improve electric osmose effect.
Embodiment
As shown in Figure 1, 2, a kind of GSZ joint grouting ultra-soft soil electric osmose construction method, first, according to project planning
The site area for needing construction is designed, is also included：
（1）Using the silt soil of Dredger Filling Engineering machinery hydraulic reclamation design height half, existed using bamboo screen frame posture GSZ 8
Mud top layer carries out reinforcement, top layer laying geotextiles to soft mud；
（2）Using the silt soil of Dredger Filling Engineering machinery hydraulic reclamation one half height of residue, again using bamboo screen frame posture geotechnique's lattice
Grid 8 carry out reinforcement to soft mud and lay geotextiles on top layer on mud top layer；
（3）Certain amount slip casting iron pipe is laid as anode 2 according to design spacing in the side of ultra-soft soil site 1, in offside
Certain amount slip casting iron pipe is laid as negative electrode 3 according to design spacing, and wherein electrode spacing connects electricity between 1-5m with wire
Pole, negative electrode and anode slip casting iron pipe are connected with a wire respectively；
（4）Grouting pump 6 and horizontal grouting conduit 11 are connected by connecting valve 13, and by horizontal grouting conduit 11 and slip casting
Iron pipe top connects, and when slip casting iron pipe is powered, it is disconnected with grouting pump 6；
（5）Main sewer 10 and suction pump 4 are laid in the side for laying negative electrode in ultra-soft soil site 1, and by GSZ 8
The horizontal aqueduct 9 in portion is connected with main sewer 10；
（6）Enclosing warning mark is set up on construction area periphery, jointed anode 2 is distinguished with cable and negative electrode 3 is arrived program control
Power supply box 5；
（7）Switching on power carries out electric osmose, and the phenomenons such as whiting, cracking and electrode disengagement occurs in the periphery soil body near electrode
When, temporary close power supply connects horizontal grouting conduit 11 and grouting pump 6, and the clay slurries 7 that will be prepared are led by horizontal grouting
Pipe 11 injects slip casting iron pipe and by the space between the entrance electrode of injected hole 12 and the soil body.
（8）Repeat step（7）, until current reduction stops electric osmose to after certain value.
As the DC electric field that the preferred embodiment of the present invention, the present invention are used, according to job site soil mass property, contain
The difference of the characteristics such as water, clay concentration of slurry, it is determined that use voltage and current, general voltage probably 90-220 V it
Between, electric current is between 50-150 A.
Used as the preferred embodiment of the present invention, the electroosmosis electrode is perpendicular to Soft Clay Foundation surface and vertically squeezes into soil
In body, a diameter of 100mm of iron pipe used by electrode, specific driving depth is exactly the depth of basement process requirement.
As the preferred embodiment of the present invention, welded using integration between the horizontal grouting conduit and slip casting iron pipe
Technology, injected hole is provided with slip casting iron pipe.
Used as the preferred embodiment of the present invention, the aperture direction of neighbouring injected hole 12 is mutually staggered.
In sum, it is of the invention to be had the following advantages that compared with existing reinforcement technique and effect：
By using Fill Reinforced With Geogrids technology, the lateral deformation of the soil body is limited, strengthen the globality of the soil body, so as to improve
Treatment effect.Migration of the moisture from anode to negative electrode, has when the horizontal drainage passage of integration is conducive to electric osmose in GSZ
Effect improves place drainage by electroosmosis consolidation effect.
Secondly, electrode is used as by iron Grouting Pipe, after producing space between electric osmose later stage iron pipe and the soil body, will be prepared
Clay slurries slip casting iron pipe is injected and by injected hole into space between electrode and the soil body by horizontal grouting conduit,
The disengagement present situation of electrode and the soil body can be improved, the effective electromotive force in electric osmose later stage is effectively improved, overall current intensity can be made to increase,
Drainage rates should also increase.
Again, compared with conventional electro-osmosis method treatment ultra-soft soil, GSZ strengthens the globality of the soil body, and slurry injection technique is improved
Electric osmose later stage efficiency, space filling can also effectively reduce differential settlement.
Described previously is only one embodiment of the present of invention, but is not intended to limit itself, the research of any this area and
Engineering staff, in the change and change without departing from the spirit of the invention, done, all within the scope of the present invention.
Claims (6)
1. a kind of GSZ combines grouting ultra-soft soil electric osmose construction method, it is characterised in that
（1）Using the silt soil of Dredger Filling Engineering machinery hydraulic reclamation design height half, using bamboo screen frame posture GSZ in mud
Top layer carries out reinforcement, top layer laying geotextiles to soft mud；
（2）Using the silt soil of Dredger Filling Engineering machinery hydraulic reclamation one half height of residue, existed using bamboo screen frame posture GSZ again
Mud top layer carries out reinforcement to soft mud and lays geotextiles on top layer；
（3）Slip casting iron pipe is laid as anode according to design spacing in ultra-soft soil site side, in opposite side according to design spacing
Slip casting iron pipe is laid as negative electrode；
（4）Grouting pump and horizontal grouting conduit are connected by connecting valve, and by horizontal grouting conduit and negative electrode, the slip casting of anode
Iron pipe top connects, and when electrode is powered, slip casting iron pipe and grouting pump is disconnected；
（5）Main sewer and pumping equipment are laid in the side for laying negative electrode in ultra-soft soil site, and by the water inside GSZ
Flat aqueduct is connected with main sewer；
（6）Distinguish jointed anode and negative electrode to programmable power supply case with cable；
（7）Switching on power carries out electric osmose, when there is whiting, cracking and electrode in the electrode perimeter soil body disengages phenomenon, temporary close
Power supply, the clay slurries that connection horizontal grouting conduit and grouting pump will have been configured are filled into the space between electrode and the soil body；
（8）Repeat step（7）, until current reduction stops electric osmose to after threshold value.
2. method according to claim 1, it is characterised in that
In described clay slurries, clay is taken from outside construction site, and moisture content improves space and fill out beneficial to the slurries presetting period is reduced
Fill effect.
3. method according to claim 1, it is characterised in that
Described GSZ is provided with the flexible water drainage pipe of water seepage hole, and adjacent flexible water drainage pipe interconnects composition grid
Net.
4. method according to claim 1, it is characterised in that
The power supply is dc source, according to job site soil mass property, clay concentration of slurry, it is determined that the voltage and current for using
Intensity.
5. method according to claim 1, it is characterised in that
Described slip casting iron pipe is vertically squeezed into the soil body perpendicular to Soft Clay Foundation surface, and driving depth is basement process requirement
Depth.
6. method according to claim 1, it is characterised in that
Integrated welding connection technology is used between the horizontal grouting conduit and slip casting iron pipe, injected hole is provided with slip casting iron pipe, noted
Slurry hole interlaced arrangement ensures that the filling of clay slurries is abundant.
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| CN201610052022.1A CN105649005B (en) | 2016-01-27 | 2016-01-27 | GSZ joint grouting ultra-soft soil electric osmose construction method |
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| CN107882013A (en) * | 2017-12-21 | 2018-04-06 | 广东赣鸿建设有限公司 | A kind of sludge solidification device and method of vacuum injection joint resistance heating |
| CN109577122A (en) * | 2018-12-07 | 2019-04-05 | 哈尔滨工业大学 | A kind of vertical drainage road structure based on electro-osmosis method |
| CN110424449B (en) * | 2019-07-16 | 2021-06-15 | 河海大学 | Microorganism control method for long-term stability of reinforced retaining wall |
| CN110670574B (en) * | 2019-10-13 | 2021-04-23 | 南通大学 | Enhanced electroosmosis method and system for reinforcing soft clay foundation |
| CN113897943B (en) * | 2021-11-15 | 2022-07-19 | 江苏科技大学 | Device and method for treating soft soil foundation through electroosmosis combined grouting |
| CN115045299B (en) * | 2022-07-26 | 2024-02-02 | 杭州市西站枢纽开发有限公司 | Deep foundation pit side wall reinforcing structure with electroosmosis drainage function and construction method |
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