CN108008116A - Vacuum heaping pre-compression combines electric osmose experimental rig - Google Patents

Vacuum heaping pre-compression combines electric osmose experimental rig Download PDF

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Publication number
CN108008116A
CN108008116A CN201711273687.6A CN201711273687A CN108008116A CN 108008116 A CN108008116 A CN 108008116A CN 201711273687 A CN201711273687 A CN 201711273687A CN 108008116 A CN108008116 A CN 108008116A
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compression
vacuum
storehouse
water
soil sample
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CN108008116B (en
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王柳江
王耀明
鲁洋
沈超敏
薛晨阳
刘斯宏
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Hohai University HHU
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Hohai University HHU
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/24Earth materials

Abstract

The invention discloses a kind of vacuum heaping pre-compression to combine electric osmose experimental rig, including experiment bucket, compression system, separating system for water, electrode loop and data collecting system;Experiment bucket includes staving and bung, and sand bedding course of the top surface covered with diaphragm seal;Compression system includes compression conduit, balancing gate pit, supply conduit and the pneumatic equipment being sequentially connected, and the first electronic balance;Separating system for water includes drainage duct, gas and water separator, suction catheters and the vacuum pump being sequentially connected, and the second electronic balance and vacuum meter;Electrode loop includes anode, ammeter, power supply and the cathode flexible drain combination body connected by conducting wire, and cathode flexible drain combination body is the packed graphite particle of internal layer, the double-deck non-woven geotextile pipe bag of outer layer bagged sand;Data collecting system includes various sensors and data collecting instrument and computer.The indoor exploratory experiment of vacuum preloading, piling prepressing, drainage by electroosmosis joint or independent role can be carried out to various soil mass sample.

Description

Vacuum heaping pre-compression combines electric osmose experimental rig
Technical field
The present invention relates to a kind of experimental rig, combines electric osmose experimental rig more particularly to a kind of vacuum heaping pre-compression, belongs to In technical field of test equipment.
Background technology
Southeastern coast and inland some areas in China, the deep weak stickiness soil layer of marine facies, lacustrine facies and river facies deposition are wide General distribution.Soft clay have water content is high, compressibility is big, permeability is low, shearing strength is low, bearing capacity is weak, thixotropy by force with And many unfavorable engineering characteristics such as structural difference.High-compressibility can cause ground to have sizable sedimentation and differential settlement;It is hypotonic Permeability causes the duration of consolidation settlement to lengthen, and influences the normal use of building;Low-intensity causes foundation bearing capacity and steady It is qualitative to tend not to meet engine request.
In recent years, with the rapid development of national economy and the increasingly expansion of regional population, substantial amounts of infrastructure project (Highway, railway, harbor approach engineering, engineering of reclaiming fields from the sea, dyke etc.)These soft clays and ultra-soft clay will be built in On ground, this proposes renewal, the requirement of higher to Soft Clay Foundation processing.
Draining concretion method is one of the effective ways for handling Soft Clay Foundation, including vacuum preloading, piling prepressing and true The common method for processing foundation such as empty preloading joint preloading.Vacuum preloading is developed rapidly and widely applied in recent years, but is being taken Good result while also expose many problems, as raising of the vacuum preloading to foundation bearing capacity is limited, to BORDER PROCESSING That constructs is more demanding, and discharging consolidation rate-constrained is in the hydraulic conductivity of clay, and vacuum passes in the high soil of sticky content It is low to pass efficiency, the processing used time is longer, is even difficult to reach expected reinforcing purpose sometimes.The main problem of piling prepressing is preloading Foundation instability caused by the source of material and possibility.Foundation soil easily produces during Combined Vacuum-surcharge Preloading overcomes preloading The shortcomings that lateral extrusion deforms and causes unstable failure, and stabilization zone can be made to vacuumize and produce pressure differential under Loading, So as to which the water accelerated in soft clay ejects.But when running into the Soft Clay Foundation that radii of soil particles is small, sticky content is high, vacuum It is slow that preloading joint preloading can not equally solve draining, the unconspicuous problem of consolidation effect.
Drainage by electroosmosis consolidation is a kind of foundation reinforcement method having wide application prospects, because its drainage rates and soil particle are big It is small unrelated, proper drainage is remained in the very poor clay of permeability, but the excessively high factor of electrode corrosion, energy expenditure restricts The engineer application of electro-osmotic drainage method.
So, there is provided it is a kind of to improve the intensity of the soil body, and may also speed up consolidation rate, improve construction effect The experimental rig of the research Soft Clay Foundation reinforcement mechanism of rate, is beneficial to the promotion and application of engineering practice.
The content of the invention
It is a primary object of the present invention to overcome deficiency of the prior art, there is provided a kind of vacuum heaping pre-compression joint electricity Experimental rig is oozed, especially suitable for studying Soft Clay Foundation reinforcement mechanism.
The technical problems to be solved by the invention are to provide compact-sized, convenient for disassembly and assembly, making easily, securely and reliably, in fact Combine electric osmose experimental rig with the strong vacuum heaping pre-compression of property, various soil mass sample can be carried out vacuum preloading, piling prepressing, The indoor exploratory experiment of drainage by electroosmosis joint or independent role, and can in soil sample consolidation process its parameters of the real time measure, To carry out quantitative analysis to consolidation process, has the utility value in industry.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of vacuum heaping pre-compression combines electric osmose experimental rig, including experiment bucket, compression system, separating system for water, electrode return Road and data collecting system.
Wherein, the bung that the experiment bucket includes the staving of top surface opening and is placed in staving opening, the bucket of the staving Chamber includes being used for the soil sample storehouse for filling soil sample and the pressing Ioad storehouse for filling water body from bottom to top;The soil sample storehouse and preloading The sand bedding course being layed on soil sample surface is provided between pressurization storehouse, the top surface of the sand bedding course is the orlop in pressing Ioad storehouse, Covered with diaphragm seal, the bulkhead in the diaphragm seal along pressing Ioad storehouse is laid with and extends staving the orlop in pressing Ioad storehouse Turn up behind edge in staving edge, the bung being placed in staving opening make it that pressing Ioad storehouse is closed together with diaphragm seal;It is located at Diaphragm seal on the bulkhead in pressing Ioad storehouse is reserved with the pre- allowance of film.
Wherein, the compression system includes compression conduit, balancing gate pit, supply conduit and the pneumatic equipment being sequentially connected, with And first electronic balance;Water is stored with the balancing gate pit, one end of the compression conduit extends into bung and pressing Ioad storehouse Silo roof communicate, the other end of compression conduit extends into balancing gate pit and stretches under the water surface, positioned at the indoor supply conduit of pressure The mouth of pipe be located on the water surface;The balancing gate pit is placed on the first electronic balance, and first electronic balance is used to measure pressure The mass change of room.
Wherein, the separating system for water includes being sequentially connected drainage duct, gas and water separator, suction catheters and true Sky pump, and the second electronic balance and vacuum meter;One end of the drainage duct sequentially passed through bung, pressing Ioad storehouse and close Extend into sand bedding course after sealer to communicate with soil sample storehouse to sand bedding course bottom surface, the other end of drainage duct extends into gas-water separation dress Put;The gas and water separator is placed on the second electronic balance, and second electronic balance is used for the displacement for measuring the soil body;Position Drainage duct in pressing Ioad storehouse is reserved with the pre- allowance of pipe.
Wherein, the electrode loop includes anode, ammeter, power supply and the cathode flexible drain combination connected by conducting wire Body, the anode are some, and some anodes vertically arranged are smoothly connected and with soil sample etc. each along the inner wall in soil sample storehouse Height, the cathode flexible drain combination body are arranged between sand bedding course and soil sample storehouse orlop and are distributed in the center in soil sample storehouse and erect On axis, the ammeter and power supply are arranged at outside experiment bucket;The top of the cathode flexible drain combination body and drainage duct It is connected, cathode flexible drain combination body is double-deck non-woven geotextile pipe bag, and the inner layer bag of double-deck non-woven geotextile pipe bag fills stone Black particle, the outer bag of double-deck non-woven geotextile pipe bag fill sand, and the other end of drainage duct is extended into sand.
Wherein, the data collecting system includes potential stylus, pore pressure gauge, the gap gas being arranged in soil sample storehouse Pressure gauge and vacuum sensor, and the data collecting instrument and computer being arranged at outside experiment bucket;The potential stylus, hole Water pressure gauge, gap pressure gauge and vacuum sensor are connected by data collecting instrument with computer respectively.
The present invention is further arranged to:The staving includes base and the middle cylinder being vertically installed on base, the head cover It is provide with the top and bottom ends of middle cylinder respectively with base, is connected between head cover and base by some pull rods on the outside of middle cylinder It is fixed.
The present invention is further arranged to:The head cover, middle cylinder and base are made of insulation organic glass.
The present invention is further arranged to:The pull rod is 4, and 4 pull rods are uniformly distributed on the outside of middle cylinder.
The present invention is further arranged to:The bottom surface of the head cover and the top surface of base are provided with matches what is docked with middle cylinder Groove, the groove is interior to be equipped with rubber seal.
The present invention is further arranged to:The base is offered for potential stylus, pore pressure gauge, gap pressure gauge The guide hole in soil sample storehouse is penetrated with vacuum sensor.
The present invention is further arranged to:8 vertical grooves are evenly arranged with the inner wall in the soil sample storehouse, in the anode Embedded vertical groove.
The present invention is further arranged to:The diaphragm seal anti-package behind staving edge of turning up lives bucket outer wall, and diaphragm seal is Duplicature, is tightened between the drainage duct and diaphragm seal with rubber.
The present invention is further arranged to:The compression conduit and drainage duct are passed through by the seal being opened on head cover Through head cover, the seal carries out encapsulation process using sealing clamp nut.
The present invention is further arranged to:Air pressure adjustment controller is provided between the balancing gate pit and pneumatic equipment, it is described Valve is both provided between gas and water separator and vacuum pump between gas and water separator and experiment bucket;The balancing gate pit is gentle Water separation device is made of tempered glass.
Compared with prior art, the invention has the advantages that:
1st, can different soil sample samples be carried out with vacuum preloading experiment, piling prepressing experiment, drainage by electroosmosis experiment, and three kinds of consolidations Method experiment and vacuum heaping pre-compression joint electric osmose experiment in combination two-by-two.
2nd, the parameters of soil sample can be monitored in real time during experiment, mainly include soil sample surface settlement, displacement, Potential, pore water pressure, gap atmospheric pressure and vacuum;And analyzed by processing to parameters, can to preloading load, The influence that voltage, vacuum consolidate soil sample is evaluated.
3rd, the mass change of balancing gate pit Zhong Shui can be monitored by the first electronic balance, the volume for being then translated into water becomes Change, thus can learn the volume change in pressing Ioad storehouse, and then obtain the average settlement on soil sample surface;Due to soil sample sedimentation Inhomogeneities, can make measurement more smart compared to traditional using displacement meter or sedimentation target measuring method, the experimental rig It is true and extremely convenient.
4th, by the setting of data collecting system, to the surface settlement of soil sample, displacement, potential, pore water pressure, gap The monitoring of atmospheric pressure and vacuum is recorded, and without artificial measurement or reading, the degree of automation is high, and data are reliable.
5th, the soil sample in experimental rig is arranged to axial symmery shape, different radial directions, same radius, the soil at identical height The parameter all same such as sample, its potential, pore pressure, vacuum, therefore the soil sample at different radial directions, same radius, identical height is distinguished Measure potential, pore pressure, the parameter such as vacuum, you can while obtain the parameters on a certain specified point, get parms efficiently, can Lean on, accurately, easy to carry out quantitative analysis to consolidation process, suitable for the reason of vacuum heaping pre-compression joint electric osmose reinforcing flexible foundation mechanism By research.
The above is only the general introduction of technical solution of the present invention, in order to be better understood upon the technological means of the present invention, under With reference to attached drawing, the invention will be further described in face.
Brief description of the drawings
Fig. 1 is the positive structure diagram that vacuum heaping pre-compression of the present invention combines electric osmose experimental rig;
Fig. 2 is the overlooking the structure diagram that vacuum heaping pre-compression of the present invention combines base in electric osmose experimental rig;
Fig. 3 is the present invention looks up structural representation that vacuum heaping pre-compression of the present invention combines head cover in electric osmose experimental rig;
Fig. 4 is the structural decomposition diagram that vacuum heaping pre-compression of the present invention combines middle cylinder and base in electric osmose experimental rig;
Fig. 5 is the structure diagram that vacuum heaping pre-compression of the present invention combines cathode flexible drain combination body in electric osmose experimental rig.
Embodiment
With reference to Figure of description, the present invention is further illustrated.
As shown in Figures 1 to 4, a kind of vacuum heaping pre-compression joint electric osmose experimental rig, including experiment bucket, compression system, Separating system for water, electrode loop and data collecting system.
The bung 3 that the experiment bucket includes the staving of top surface opening and is placed in staving opening, the staving include base 2 With the middle cylinder 1 being vertically installed on base 2, the head cover 3 and base 2 are provide with the top and bottom ends of middle cylinder 1,3 He of head cover respectively Connected and fixed by some pull rods 29 positioned at the middle outside of cylinder 1 between base 2.The head cover 3, middle cylinder 1 and base 2 use Insulation organic glass is made;The pull rod 29 is 4, and 4 pull rods 29 are uniformly distributed in the middle outside of cylinder 1.
The bottom surface of the head cover 3 and the top surface of base 2 are provided with the groove 30 for matching with middle cylinder 1 and docking, the groove Rubber seal 31 is equipped with 30, it is ensured that tests the leakproofness of bucket.
1 barrel of chamber of middle cylinder of the staving includes being used to fill the soil sample storehouse of soil sample 4 and for filling water body from bottom to top Pressing Ioad storehouse 6;The sand bedding course 5 being layed on 4 surface of soil sample is provided between the soil sample storehouse and pressing Ioad storehouse 6, it is described The top surface of sand bedding course 5 is the orlop in pressing Ioad storehouse 6, and the orlop in pressing Ioad storehouse 6 is described close covered with double-deck diaphragm seal 10 The bulkhead in sealer 10 along pressing Ioad storehouse 6 be laid with and extend middle cylinder 1 edge turn up behind middle 1 edge of cylinder anti-package live in cylinder 1 outer wall, is placed on the bung 3 in the middle opening of cylinder 1 together with diaphragm seal 10 so that pressing Ioad storehouse 6 is closed;Positioned at pressing Ioad storehouse 6 Bulkhead on diaphragm seal 10 be reserved with the pre- allowance of film(As shown in Figure 1 along 10 bending section of diaphragm seal of middle 1 inner wall of cylinder), This is the settlement factors for considering the soil sample 4 during experiment.
The compression system includes compression conduit 11, balancing gate pit 12, supply conduit 13 and the pneumatic equipment 14 being sequentially connected, And first electronic balance 34;Water is stored with the balancing gate pit 12, one end of the compression conduit 11 extends into bung 3 and heap The silo roof for carrying pressurization storehouse 6 communicates, and the other end of compression conduit 11 extends into balancing gate pit 12 and stretches under the water surface, positioned at balancing gate pit The mouth of pipe of supply conduit 13 in 12 is located on the water surface;The balancing gate pit 12 is placed on the first electronic balance 34, and described first Electronic balance 34 is used for the mass change for measuring balancing gate pit 12.
The compression conduit 11 and drainage duct 22 penetrate head cover 3, institute by the seal 36 being opened on head cover 3 State seal 36 and encapsulation process is carried out using sealing clamp nut 32, prevent air water from revealing.The balancing gate pit 12 and pneumatic equipment Be provided with air pressure adjustment controller between 14, between the gas and water separator 23 and experiment bucket and gas and water separator 23 with very Valve is both provided between sky pump 26;Experiment process needs to bear high pressure, and the balancing gate pit 12 is made of tempered glass.
The separating system for water includes drainage duct 22, gas and water separator 23,25 and of suction catheters being sequentially connected Vacuum pump 26, and the second electronic balance 35 and vacuum meter 24;One end of the drainage duct 22 sequentially passed through bung 3, heap Extend into sand bedding course 5 after carrying pressurization storehouse 6 and diaphragm seal 10 and communicated to 5 bottom surface of sand bedding course with soil sample storehouse, drainage duct 22 it is another One end extends into gas and water separator 23;The gas and water separator 23 is placed on the second electronic balance 35, second electronics Balance 35 is used for the displacement for measuring the soil body 4;Drainage duct 22 in pressing Ioad storehouse 6 is reserved with the pre- allowance of pipe(Such as Fig. 1 Shown in be located at pressing Ioad storehouse 6 in 22 spiral section of drainage duct), this is also consider during experiment soil sample 4 heavy Drop factor.Experiment process needs to bear high pressure, and the gas and water separator 23 is also made of tempered glass;The drainage duct 33 are pricked with rubber to tighten, prevent air water from revealing between 22 and diaphragm seal 10.
The electrode loop includes anode 27, ammeter 8, power supply 9 and the cathode flexible drain combination connected by conducting wire Body 7,8 vertical grooves 28 contour with soil sample 4 are evenly arranged with the inner wall in the soil sample storehouse, and the anode 27 is also 8, 8 anodes 27 are embedded in vertical groove 28 each along the inner wall in soil sample storehouse and are smoothly connected, and can so make anode 27 in soil sample 4 It is unaffected in infall process;The cathode flexible drain combination body 7 is arranged between sand bedding course 5 and soil sample storehouse orlop and divides It is distributed on the center vertical axis in soil sample storehouse, the ammeter 8 and power supply 9 are arranged at outside experiment bucket;Test the center vertical axis of bucket Cathode flexible drain combination body 7 is equipped with i.e. at 4 center vertical axis of soil sample, thus can in test form axisymmetric potential point Cloth so that pore water is converged by four circumferential axis.
As shown in figure 5, the top of the cathode flexible drain combination body 7 is connected with drainage duct 22, cathode flexible draining Assembly 22 is double-deck non-woven geotextile pipe bag 37, and double-deck non-woven geotextile pipe bag 37 is placed in by a less tubular bag of diameter Sew and form in one tubular bag being relatively large in diameter;The inner layer bag of double-deck non-woven geotextile pipe bag 37 fills graphite particle 38, double The outer bag of layer non-woven geotextile pipe bag 37 fills sand 39, and the other end of drainage duct 22 is extended into sand 39.Drainage duct 22 After being inserted into outer layer sand 39, the top of double-deck non-woven geotextile pipe bag 37 and drainage duct 22 are tied up together, it is ensured that leakproofness.
The data collecting system includes potential stylus 16, pore pressure gauge 17, the gap gas being arranged in soil sample storehouse Pressure gauge 18 and vacuum sensor 19, and the data collecting instrument 20 and computer 21 being arranged at outside experiment bucket;The potential Stylus 16, pore pressure gauge 17, gap pressure gauge 18 and vacuum sensor 19 pass through data collecting instrument 20 and meter respectively Calculation machine 21 is connected.The base 2 is offered for potential stylus 16, pore pressure gauge 17, gap pressure gauge 18 and vacuum Sensor 19 penetrates the guide hole 15 in soil sample storehouse, to carry out closed processes to guide hole 15, prevent air water from revealing;For guide hole 15 Quantity can be adjusted accordingly according to the sensing station sum number amount specific requirement of experiment.Pass through the setting of these above-mentioned sensors Potential, pore water pressure, gap atmospheric pressure and each parameter of vacuum of soil sample 4 can be monitored in real time during experiment.
Specifically used and experiment process is that potential stylus 16 and cathode flexible drain combination body 7 are set in middle cylinder, so After insert soil sample 4, pore pressure gauge 17, gap pressure gauge 18 and vacuum sensor are set when being filled to relevant position 19;Sand bedding course 5 is laid with 4 surface of soil sample filled in, diaphragm seal 10 is laid with sand bedding course 5;By compression conduit 11 and draining Conduit 22 is connected with head cover 3, and drainage duct 22 will be connected to cathode flexible drain combination body 7;Then by 6 note of pressing Ioad storehouse Full water, then top cover 3 and fixed with pull rod 29;It should be noted that reserved before head cover 3 covers it is noted that leaving sedimentation (Diaphragm seal 10 and drainage duct 22 are required to reserve), and to experiment bucket extraction wire, sensor data cable and balancing gate pit 12 Encapsulation process is carried out using sealing clamp nut with the inlet and outlet on gas and water separator 23;Connect compression system and air water Each connecting conduit in piece-rate system, installs in balancing gate pit 12 and meets that the appropriate of 4 settlement request of soil sample uses water;Finally, open The power supply 9 of pneumatic equipment 14, vacuum pump 26 and/or electrode can start to test.
During experiment, pressing Ioad storehouse 6 is further applied load by hydraulic pressure, balancing gate pit 12 be placed in the first electronic balance 34 it On, the mass change of throughput measuring pressure room 12 can convert the surface settlement of soil sample 4.Vacuumized by vacuum pump 26 by cathode Gas and water in flexible water drainage assembly 7 is together extracted out, and after gas and water enters gas and water separator 23, water will be stored in the air water point From in device 23, gas is then pumped by suction catheters 25, and gas and water separator 23 is placed on the second electronic balance 35, passes through The data variation of two electronic balances 35 can measure the displacement of the soil body 4;Wherein, it is desirable to which drainage duct 22 and suction catheters 25 are stretched Enter the mouth of pipe in gas and water separator 23 to be required to more than the extraction water surface.
The present invention can carry out various soil mass sample vacuum preloading, piling prepressing, drainage by electroosmosis triple combination or independent The indoor exploratory experiment of effect, and can in soil sample consolidation process its parameters of the real time measure, to determine consolidation process Amount analysis, suitable for the theoretical research of vacuum heaping pre-compression joint electric osmose reinforcing flexible foundation mechanism.
Basic principle, the main features and advantages of the present invention have been shown and described above.The technical staff of the industry should Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe the original of the present invention Reason, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes and improvements It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle It is fixed.

Claims (10)

1. a kind of vacuum heaping pre-compression combines electric osmose experimental rig, it is characterised in that:Including experiment bucket, compression system, air water point From system, electrode loop and data collecting system;
The bung that the experiment bucket includes the staving of top surface opening and is placed in staving opening, the bucket chamber of the staving is from bottom to top Including for filling the soil sample storehouse of soil sample and pressing Ioad storehouse for filling water body;Between the soil sample storehouse and pressing Ioad storehouse It is provided with the sand bedding course being layed on soil sample surface, the top surface of the sand bedding course is the orlop in pressing Ioad storehouse, pressing Ioad storehouse Orlop covered with diaphragm seal, the bulkhead in the diaphragm seal along pressing Ioad storehouse is laid with and turns up after extending the edge of staving In staving edge, the bung being placed in staving opening make it that pressing Ioad storehouse is closed together with diaphragm seal;Positioned at pressing Ioad storehouse Bulkhead on diaphragm seal be reserved with the pre- allowance of film;
The compression system includes compression conduit, balancing gate pit, supply conduit and the pneumatic equipment being sequentially connected, and the first electronics Balance;Water is stored with the balancing gate pit, one end of the compression conduit extends into bung and is communicated with the silo roof in pressing Ioad storehouse, The other end of compression conduit extends into balancing gate pit and stretches under the water surface, and the mouth of pipe positioned at the indoor supply conduit of pressure is located at water On face;The balancing gate pit is placed on the first electronic balance, and first electronic balance is used for the mass change for measuring balancing gate pit;
The separating system for water includes drainage duct, gas and water separator, suction catheters and the vacuum pump being sequentially connected, and Second electronic balance and vacuum meter;Prolonged after sequentially passing through bung, pressing Ioad storehouse and diaphragm seal one end of the drainage duct Stretch into sand bedding course to communicate with soil sample storehouse to sand bedding course bottom surface, the other end of drainage duct extends into gas and water separator;It is described Gas and water separator is placed on the second electronic balance, and second electronic balance is used for the displacement for measuring the soil body;Positioned at preloading Drainage duct in pressurization storehouse is reserved with the pre- allowance of pipe;
The electrode loop includes anode, ammeter, power supply and the cathode flexible drain combination body connected by conducting wire, the sun Extremely some, some anodes vertically arranged are smoothly connected and, described the moon contour with soil sample each along the inner wall in soil sample storehouse Pole flexible water drainage assembly is arranged between sand bedding course and soil sample storehouse orlop and is distributed on the center vertical axis in soil sample storehouse, institute State ammeter and power supply is arranged at outside experiment bucket;The top of the cathode flexible drain combination body is connected with drainage duct, cathode Flexible water drainage assembly is double-deck non-woven geotextile pipe bag, and the inner layer bag of double-deck non-woven geotextile pipe bag fills graphite particle, double The outer bag of layer non-woven geotextile pipe bag fills sand, and the other end of drainage duct is extended into sand;
The data collecting system include being arranged at potential stylus in soil sample storehouse, pore pressure gauge, gap pressure gauge and Vacuum sensor, and the data collecting instrument and computer being arranged at outside experiment bucket;The potential stylus, pore water pressure Meter, gap pressure gauge and vacuum sensor are connected by data collecting instrument with computer respectively.
2. vacuum heaping pre-compression according to claim 1 combines electric osmose experimental rig, it is characterised in that:The staving includes Base and the middle cylinder being vertically installed on base, the head cover and base are provide with the top and bottom ends of middle cylinder respectively, push up lid and bottom Connected and fixed by some pull rods on the outside of middle cylinder between seat.
3. vacuum heaping pre-compression according to claim 2 combines electric osmose experimental rig, it is characterised in that:The head cover, in Cylinder and base are made of insulation organic glass.
4. vacuum heaping pre-compression according to claim 2 combines electric osmose experimental rig, it is characterised in that:The pull rod is 4 Root, 4 pull rods are uniformly distributed on the outside of middle cylinder.
5. vacuum heaping pre-compression according to claim 2 combines electric osmose experimental rig, it is characterised in that:The bottom of the head cover The top surface of face and base is provided with the groove for matching with middle cylinder and docking, and rubber seal is equipped with the groove.
6. vacuum heaping pre-compression according to claim 2 combines electric osmose experimental rig, it is characterised in that:The base opens up There is the guide hole penetrated for potential stylus, pore pressure gauge, gap pressure gauge and vacuum sensor in soil sample storehouse.
7. vacuum heaping pre-compression according to claim 1 combines electric osmose experimental rig, it is characterised in that:The soil sample storehouse 8 vertical grooves are evenly arranged with inner wall, the anode is embedded in vertical groove.
8. vacuum heaping pre-compression according to claim 1 combines electric osmose experimental rig, it is characterised in that:Outside the diaphragm seal Turn over the anti-package behind staving edge and live bucket outer wall, diaphragm seal is duplicature, is pricked between the drainage duct and diaphragm seal with rubber Tighten.
9. vacuum heaping pre-compression according to claim 1 combines electric osmose experimental rig, it is characterised in that:The compression conduit Head cover is penetrated by the seal being opened on head cover with drainage duct, the seal is carried out using sealing clamp nut Encapsulation process.
10. vacuum heaping pre-compression according to claim 1 combines electric osmose experimental rig, it is characterised in that:The balancing gate pit Air pressure adjustment controller is provided between pneumatic equipment, between the gas and water separator and experiment bucket and gas and water separator Valve is both provided between vacuum pump;The balancing gate pit and gas and water separator are made of tempered glass.
CN201711273687.6A 2017-12-06 2017-12-06 Vacuum preloading and electroosmosis combined test device Active CN108008116B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108226446A (en) * 2018-01-27 2018-06-29 福州大学 Dredged mud negative pressure is transmitted and rate of decay measures experimental rig
CN108867715A (en) * 2018-06-01 2018-11-23 南通大学 A kind of indoor model test device and method of vacuum-electric osmose-high pressure joint reinforcement soft clay
CN109270109A (en) * 2018-08-16 2019-01-25 温州大学 Soft clay hot consolidation experimental model device

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