CN106093348B - EKG layers of tubulose is into formula electrochemistry slip casting reinforcing soft foundation test method and device - Google Patents
EKG layers of tubulose is into formula electrochemistry slip casting reinforcing soft foundation test method and device Download PDFInfo
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Abstract
The invention discloses EKG layers of tubuloses into formula electrochemistry slip casting reinforcing soft foundation test method and device, this method combines vacuum preloading, electrochemistry grouting and reinforcing method, and using EKG pipes it is electrically conductive, can slip casting and corrosion-resistant function, second consolidation is carried out to the soil body, meanwhile slip casting is carried out using separated grouting mode.Apparatus of the present invention include organic glass model slot, EKG pipes are a novel conductive plastic drain-pipe, two groups of copper conductors run through and are symmetrically inserted into tube wall, can be used as electroosmosis electrode, vertical drainage channel and electrochemistry Grouting Pipe simultaneously, and a pvc pipe with holes is respectively arranged in anode and cathode and centre position；The sealing of hole blend rubber plug is provided on model trough floor cathode, the copper wire available wire in EKG pipes is connect with external power supply, and EKG pipes are arranged in the both sides of model slot along its length.The present invention can improve soil stabilization with the displacement of the accurate measurements soil body, potential curent change etc., improve soft base bearing capacity, consolidation effect is evenly.
Description
Technical field
The present invention relates to EKG layers of tubuloses into formula electrochemistry slip casting reinforcing soft foundation test method and device, belongs to soil stabilization
Technical field.
Background technology
China is although vast in territory, but the soil body is very uneven using being distributed.Most population aggravation is on east edge
Haiti area, and the most ground in the region is made of barged-in fill, marine soft soil, muddy soft soil etc..These soil property shapes
At the ground characteristics that have that water content is big, bearing capacity is small, compressibility is high etc. and frequently result in some foreseeable engineering problems.Mesh
The preceding reinforcing soft foundation method for above-mentioned ground has very much, for example, replacement cushion method, the close, compacting method that shakes, displacement method, reinforcement method,
Cementing method, freezing and heating etc..But such method for processing foundation is required to certain construction equipment and utensil, can expend a large amount of
Construction material, sometimes can also be insufficient because of foundation bearing capacity and lead to not meet construction.And such processing method is being applied
Working hour can give birth to ground local products certain disturbance, also will produce the pollutions such as noise and flyash, the production to periphery and resident's life
Work impacts.
Vacuum method is a kind of method of efficient and cost-effective environmental protection, it will be in the soil body using the vacuum environment formed
The substances such as water, gas are discharged outside the soil body, and numerous Engineering Projects over the past two decades demonstrate its high efficiency.But it utilizes this
The ground of method processing, foundation surface form crust layer, and crust layer is that deep soil drainage effect is poor particularly below, are carrying out work
It generally requires to carry out after-treatment before Cheng Jianshe.Electro-osmosis method is also a kind of effective method, it is by the way that conductive electrode to be inserted into
In Soft Clay Foundation, then direct current is passed to, the moisture in the soil body will be from anode to movable cathode.Its drainage rates are not by waterpower
The influence of infiltration coefficient, it is relatively high for sticky content, the lower Soft Clay Foundation treatment effect of osmotic coefficient ratio is particularly evident,
But above there are still some problems in popularization and application.For example, the metal electrode used during electric osmose easily corrodes, electro-osmosis method is utilized
Intensity improves limited when individually carrying out foundation stabilization.Although electrochemistry slip casting can improve soil strength to a certain extent, by
It is often carried out slowly in electric osmose process, so there is no expected good for simple electrochemistry slip casting effect.
Patent publication No. is that a kind of " the consolidating mud soil electrochemical modification hardened system " of CN 204676521U discloses
A kind of experimental rig for reinforcing muck soil using electrochemistry slip casting method, although the device can soil mass consolidation to a certain extent,
But it uses metal electrode first, does not consider the perishable disadvantage of metal electrode, furthermore electrode and Grouting Pipe are provided separately,
Complicated device, and the method that the device may be only available for electrochemistry slip casting, treated that intensity improves limited, effect for the soil body
Fruit is poor.
Invention content
The technical problem to be solved by the present invention is to：Tubulose EKG (Electrokinetic Geosynthetics) is provided
Layer is into formula electrochemistry slip casting reinforcing soft foundation test method and device, and solving existing method, soil strength is limited to ask to improving
Topic.
The present invention uses following technical scheme to solve above-mentioned technical problem：
For EKG layers of tubulose into formula electrochemistry slip casting reinforcing soft foundation test method, this method includes that tubulose EKG straight-lines are true successively
Empty precompressed and tubulose EKG electrochemistry two stages of slip casting；
Wherein, in the tubulose EKG directly discharging type vacuum prepressing stages：The vacuum degree of Control experiment soil sample is 60kPa, in experiment soil
The anode and cathode of sample is symmetrically inserted into an EKG pipe with holes, and preliminary reinforcing drainage position is carried out to experiment soil sample using vacuum method
Reason is transferred to the tubulose EKG electrochemistry slip casting stages when being remained unchanged when the displacement continuous 3 for testing soil sample is small；
In the tubulose EKG electrochemistry slip casting stages：An EKG with holes is symmetrically inserted into the anode and cathode of experiment soil sample to manage, and
The anode and cathode and centre position for testing soil sample are respectively inserted into a pvc pipe with holes, using electrochemistry slip casting method to testing soil sample again
Reinforcing drainage sunk well is carried out, when electrochemistry slip casting method starts, calcium chloride solution is injected in anode EKG pipes with holes, when discharge
When containing calcium chloride solution in water, at the same it is molten toward injection sodium metasilicate in the pvc pipe with holes of anode, centre position, cathode is arranged in
Liquid, when being remained unchanged when the displacement continuous 3 for testing soil sample is small, you can terminate experiment.
As a kind of preferred embodiment of the method for the present invention, in the tubulose EKG vacuum preloading stages, vacuum equipment control is utilized
The vacuum degree of system experiment soil sample is 60kPa, and vacuum equipment is connect by drain header with EKG pipes with holes, and the water of soil sample is tested
Lease making drain header is discharged.
As a kind of preferred embodiment of the method for the present invention, in the tubulose EKG electrochemistry slip casting stage, in EKG pipes with holes
Two strands of copper wire are enclosed with, copper wire is connect by conducting wire with DC power supply, and the calcium chloride solution and the ratio of experiment soil sample of injection are
1:120000, and the calcium chloride solution that injects and be arranged in the pvc pipe with holes of anode, centre position, cathode and inject sodium metasilicate
The ratio of solution is 10:3:3:4.
EKG layers of tubulose is into formula electrochemistry slip casting reinforcing soft foundation experimental rig, including organic glass model slot, organic glass mould
Anode and cathode is symmetrically inserted into two EKG pipes with holes along its length inside type groove, and two strands of copper wire are enclosed in EKG pipes with holes；
At the tubulose EKG directly discharging type vacuum prepressing stages, which further includes drain header, vacuum tube, vacuum meter, electronics
Scale, bottle,suction, vacuum pump and multifunctional water pump control cabinet, EKG pipes with holes are connected by one end of drain header and vacuum tube, very
The blank pipe other end is connect with bottle,suction, and vacuum meter is provided on vacuum tube, and bottle,suction is placed on electronic scale, and bottle,suction connects vacuum
Pump, vacuum pump connect multifunctional water pump control cabinet；
At the tubulose EKG electrochemistry slip casting stages, the device further include conducting wire, DC power supply, collection bottle, three it is with holes
Pvc pipe, copper wire are connect by conducting wire with DC power supply, and a pvc pipe with holes, cathode side band are respectively inserted into anode and cathode and centre position
Organic glass model slot corresponding position is provided with draining hole below the EKG pipes of hole, and collection bottle is placed with below hole.
As a kind of preferred embodiment of apparatus of the present invention, the tubulose EKG directly discharging type vacuum prepressing stages, which also wraps
The geomembrane, sand bedding course, vacuum diaphragm for leakage test soil sample are included, the surface of the experiment soil sample is from bottom to top equipped with successively
Geomembrane, sand bedding course, vacuum diaphragm.
As a kind of preferred embodiment of apparatus of the present invention, the tubulose EKG electrochemistry slip casting stage, which further includes three
Group potential probe throws anode and cathode and the centre position of experiment soil sample into, is used for the potential of detection test soil sample respectively.
The present invention has the following technical effects using above technical scheme is compared with the prior art：
1, the present invention uses tubulose EKG directly discharging type vacuum prepressing method combination electrochemistry slip casting methods, compared to Conventional electrochemical
Slip casting method, soil stabilization level is apparent, and consolidation effect is more preferable, and the soft soil foundation after reinforcing has higher bearing capacity；Using point
Region grouting method, reinforcing mode is more reasonable, and soil stabilization intensity distribution is evenly.
2, experimental rig of the present invention is simple and reasonable, easy to operate, can be used to carry out indoor tubulose EKG directly discharging type vacuums
Precompressed model test, tubulose EKG electrochemistry grouting model test and vacuum-slip casting Combined Trials, before ensureing leakproofness
The potential that can accurately measure inside soil body and the variation of monitoring current value are put, monitors displacement variation in real time.
3, the present invention is injected separately into calcium chloride on tubulose ekg electrode and PVC Grouting Pipes and sodium metasilicate slurries can be abundant
Electrode and the slip casting for playing EKG pipes act on, and avoid in EKG pipes while injecting calcium chloride and sodium silicate solution causes to block up
Plug, influences slip casting effect, while avoiding the perishable disadvantage of metal electrode.
4, the present invention connects vacuum pump using multifunctional water pump control cabinet, and vacuum degree in model slot is kept to design vacuum degree
In range, the switch of vacuum pump is controlled, it is energy saving.
Description of the drawings
Fig. 1 is the structural schematic diagram of tubulose EKG vacuum preloading subtraction units in the present invention.
Fig. 2 is the organigram of tubulose EKG in the present invention.
Fig. 3 is the structural schematic diagram of tubulose EKG electrochemistry grouting devices in the present invention.
Fig. 4 is the vertical view of tubulose EKG electrochemistry grouting devices in the present invention.
Fig. 5 is the organigram of pvc pipe with holes in the present invention.
Wherein, 1 is multifunctional water pump control cabinet, and 2 be vacuum pump, and 3 be bottle,suction, and 4 be electronic scale, and 5 be vacuum meter, and 6 are
Vacuum tube, 7 be organic glass model slot, and 8 manage for EKG with holes, and 9 be potential probe, and 10 be sand bedding course, and 11 be vacuum diaphragm, and 12 are
Drain header, 13 be conducting wire, and 14 be DC power supply, and 15 be draining hole, and 16 collection bottles, 17 be pvc pipe with holes, and 18 be experiment soil
Sample.
Specific implementation mode
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the present invention, and is not construed as limiting the claims.
As shown in Fig. 1, Fig. 3, Fig. 4, tests for tubulose EKG layers provided by the invention and fill into formula electrochemistry slip casting reinforcing soft foundation
It sets, including organic glass model slot 7,7 bottom plate cathode side of model slot is opened there are one draining 15 blend rubber plug of hole sealing, with holes
Be enclosed with two strands of copper wire in EKG pipes 8 (as shown in Figure 2), copper wire can use insulation joint head by conducting wire 13 connect again with direct current
Source 14 connects, and upper both sides can be inserted vertically into EKG pipes 8 with holes along its length inside model slot 7, in anode and cathode and middle position
A respectively piece pvc pipe 17 (as shown in Figure 5) with holes of arrangement, cathode side EKG pipes 8 with holes are placed on draining hole 15, and anode is with holes
EKG pipes 8 are symmetrically placed；EKG pipes 8 with holes are directly connect with vertical drainage supervisor 12, and 6 upside of vacuum tube is provided with vacuum meter 5, supervises
Under-membrance vacuum degree variation is surveyed, drain header 12 is connect with vacuum tube 6 by three-way connection and connect again with bottle,suction 3, and bottle,suction 3 is set
In on electronic scale 4, bottle,suction 3 connects vacuum pump 2, and multifunctional water pump control cabinet 1 connects vacuum pump 2 and connects power supply.
Organic glass model slot 7 is suitable for not being laid with directly discharging type vacuum prepressing method, electro-osmosis method or the pipe of horizontal drain pipe
The compound straight-line vacuum method of shape EKG electro-osmosis methods, electrochemistry slip casting method.
When carrying out tubulose EKG directly discharging type vacuum prepressing methods, select outer diameter size equal with 8 inner diameter size of EKG pipes with holes
Drain header 12 be connected directly with EKG pipes 8 with holes, be used in combination raw material band winding interface to ensure air-tightness, drain header 12 passes through
Vacuum diaphragm 11 connect composition vacuum system with vacuum tube 6；When carrying out electrochemistry slip casting, then arrange pvc pipe 17 with holes and
7 bottom plate of model slot is drained the rubber stopper on hole 15 and taken out by potential probe 9, and the water in the soil body is discharged from draining hole 15,
Two strands of copper wire on EKG pipes 8 with holes are connect by insulating clamp with conducting wire 13 connect composition electrochemistry note with DC power supply 14 again
Slurry system.
Tubulose EKG layers provided by the invention include the following steps into formula electrochemistry slip casting reinforcing soft foundation method：
Tubulose EKG directly discharging type vacuum prepressing stage etch：
1) prepare organic glass model slot 7, and smear epoxy resin on 7 surrounding inner wall of model slot, reduce experiment process
In boundary effect.
2) the draining hole 15 on 7 bottom plate of model slot is blocked with rubber stopper, vertical arrangement is with holes in model slot 7
EKG pipes 8 cover 15 top of draining hole with Woven geofabric, and the EKG pipes 8 with holes at cathode are placed on draining hole 15,
EKG pipes 8 with holes at anode and EKG pipes with holes at cathode are symmetrically placed.
3) the experiment soil sample 18 configured is loaded at model slot 7 to sand bedding course 10, arranging soil sample just keeps its smooth in face.
4) arrange that sealing system, 18 surface of experiment soil sample are laid with geomembrane, after inspection is errorless, in model slot 7 equably
The sand bedding course 10 of about 3cm thickness is loaded, arranging its surface keeps it smooth as possible, is finally laid with vacuum diaphragm 11, vacuum diaphragm 11 is pressed into
In the soil body of 7 surrounding of model slot, soft clay is used in combination to be backfilling and compacted, ensures leakproofness, carry out the sealing at 12 membrane of drain header.
5) arrange drainage system, EKG pipes 8 with holes are connect with drain header 12, drain header 12 pass through sand bedding course 10 and
Vacuum diaphragm 11 is connect with vacuum tube 6, and 6 upside of vacuum tube arranges that vacuum meter 5, vacuum tube 6 are connect with bottle,suction 3, multifunctional water pump
Control cabinet 1 is connect with vacuum pump 2, forms the low-pressure drainage system of directly discharging type vacuum prepressing, and bottle,suction 3 is placed on electronic scale 4,
For measuring pump-out in real time.
6) directly the soil body is handled with tubulose EKG directly discharging type vacuum prepressings method, when experiment proceeds to displacement continuous 3
When hour remains unchanged, the step-by-step test can be terminated.
Electrochemistry slip casting stage etch：
1) turn off vacuum pump 2, EKG pipes 8 with holes and drain header 12 separated, remove vacuum diaphragm 11, remove sand bedding course 10,
And the remaining sand on 18 surface of experiment soil sample is cleaned out, pull out the rubber stopper on 7 bottom plate of model slot draining hole 15.
2) measuring system and filling system are arranged, prepares three groups of potential probes 9 respectively, along away from cathode drain duct 2.5cm,
The distance of 10cm, 17.5cm are set into soil sample 3cm, 6cm, 9cm depths, and copper conductor is connected by insulating clamp on EKG pipes 8 with holes
Conducting wire 13 is connect again to be connected with DC power supply 14；It is inserted vertically into band respectively at experiment 18 anode of soil sample, centre position, cathode site
Hole pvc pipe 17.
3) toward injecting 50ml calcium chloride solutions in anode EKG pipes when the step-by-step test starts, when containing chlorine in the water of discharge
When changing calcium solution simultaneously toward be arranged in the pvc pipe with holes at anode, centre position and cathode site injection 15ml, 15ml,
20ml sodium silicate solutions, the corresponding earth volume of amount of solution injected in the present embodiment are 200mm × 250mm × 120mm, work as the soil body
Displacement can terminate to test when remaining unchanged within continuous 3 hours.
At the initial stage of reinforcing, moisture content is larger in the soil body, using tubulose EKG directly discharging type vacuum prepressing methods to the soil body at
Reason, be discharged the soil body in moisture, with experiment carry out, soil moisture content reduce, vacuum degree in inside soil body along depth attenuation, very
Empty precompressed effect declines, then uses electrochemistry slip casting method instead and handled again the soil body, and moisture, soil mass consolidation, by dividing is discharged
Region slip casting ensures soil strength uniformity.
Above example is merely illustrative of the invention's technical idea, and protection scope of the present invention cannot be limited with this, every
According to technological thought proposed by the present invention, any change done on the basis of technical solution each falls within the scope of the present invention
Within.
Claims (6)
1. EKG layers of tubulose is into formula electrochemistry slip casting reinforcing soft foundation test method, which is characterized in that this method includes tubulose successively
EKG directly discharging type vacuum prepressings and tubulose EKG electrochemistry two stages of slip casting；
Wherein, in the tubulose EKG directly discharging type vacuum prepressing stages：The vacuum degree of Control experiment soil sample is 60kPa, in experiment soil sample
Anode and cathode is symmetrically inserted into an EKG pipe with holes, and preliminary reinforcing drainage sunk well is carried out to experiment soil sample using vacuum method, when
When the displacement of experiment soil sample remains unchanged for continuous 3 hours, it is transferred to the tubulose EKG electrochemistry slip casting stages；
In the tubulose EKG electrochemistry slip casting stages：It is symmetrically inserted into an EKG pipe with holes in the anode and cathode of experiment soil sample, and is being tested
A pvc pipe with holes is respectively inserted into the anode and cathode of soil sample and centre position, is carried out again to experiment soil sample using electrochemistry slip casting method
Drainage sunk well is reinforced, when electrochemistry slip casting method starts, calcium chloride solution is injected in anode EKG pipes with holes, when in the water of discharge
When containing calcium chloride solution, while sodium silicate solution is injected toward being arranged in the pvc pipe with holes of anode, centre position, cathode, when
When the displacement of experiment soil sample remains unchanged for continuous 3 hours, you can terminate experiment.
2. tubulose EKG layers into formula electrochemistry slip casting reinforcing soft foundation test method according to claim 1, which is characterized in that institute
It states in the tubulose EKG directly discharging type vacuum prepressing stages, the vacuum degree using vacuum equipment Control experiment soil sample is 60kPa, and vacuum
Equipment is connect by drain header with EKG pipes with holes, and the moisture for testing soil sample is discharged through drain header.
3. tubulose EKG layers into formula electrochemistry slip casting reinforcing soft foundation test method according to claim 1, which is characterized in that institute
It states in the tubulose EKG electrochemistry slip casting stages, two strands of copper wire is enclosed in EKG pipes with holes, copper wire is connected by conducting wire and DC power supply
It connects, the calcium chloride solution of injection and the ratio of experiment soil sample are 1:120000, and inject calcium chloride solution and be arranged in anode,
Centre position, cathode pvc pipe with holes in injection sodium silicate solution ratio be 10:3:3:4.
4. EKG layers of tubulose is into formula electrochemistry slip casting reinforcing soft foundation experimental rig, which is characterized in that including organic glass model slot,
Anode and cathode is symmetrically inserted into two EKG pipes with holes along its length inside organic glass model slot, and two strands are enclosed in EKG pipes with holes
Copper wire；
At the tubulose EKG directly discharging type vacuum prepressing stages, the device further include drain header, vacuum tube, vacuum meter, electronic scale,
Bottle,suction, vacuum pump and multifunctional water pump control cabinet, EKG pipes with holes are connected by one end of drain header and vacuum tube, vacuum
The pipe other end is connect with bottle,suction, and vacuum meter is provided on vacuum tube, and bottle,suction is placed on electronic scale, and bottle,suction connects vacuum
Pump, vacuum pump connect multifunctional water pump control cabinet；
At the tubulose EKG electrochemistry slip casting stages, which further includes conducting wire, DC power supply, collection bottle, three pvc pipes with holes,
Copper wire is connect by conducting wire with DC power supply, and a pvc pipe with holes, cathode side EKG with holes are respectively inserted into anode and cathode and centre position
Organic glass model slot corresponding position is provided with draining hole below pipe, and collection bottle is placed with below hole.
5. tubulose EKG layers into formula electrochemistry slip casting reinforcing soft foundation experimental rig according to claim 4, which is characterized in that institute
The tubulose EKG directly discharging type vacuum prepressing stages are stated, which further includes the geomembrane, sand bedding course, vacuum for leakage test soil sample
The surface of film, the experiment soil sample is from bottom to top equipped with geomembrane, sand bedding course, vacuum diaphragm successively.
6. tubulose EKG layers into formula electrochemistry slip casting reinforcing soft foundation experimental rig according to claim 4, which is characterized in that institute
The tubulose EKG electrochemistry slip casting stages are stated, which further includes three groups of potential probes, throws the anode and cathode of experiment soil sample into respectively in
Between position, be used for detection test soil sample potential.
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| CN107724379B (en) * | 2017-09-21 | 2019-06-21 | 河海大学 | A kind of method of electrochemistry-vacuum prepressing reinforcement soft base |
| CN113106963A (en) * | 2021-03-26 | 2021-07-13 | 中煤科工集团沈阳研究院有限公司 | Electrochemical grouting treatment method for side slope based on pile forming effect |
| CN114858895B (en) * | 2022-05-07 | 2023-09-22 | 江苏科技大学 | Test device and test method for electrochemical consolidation drainage circulation heating cathode local soil body |
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