CN108867715A - A kind of indoor model test device and method of vacuum-electric osmose-high pressure joint reinforcement soft clay - Google Patents
A kind of indoor model test device and method of vacuum-electric osmose-high pressure joint reinforcement soft clay Download PDFInfo
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- CN108867715A CN108867715A CN201810556826.4A CN201810556826A CN108867715A CN 108867715 A CN108867715 A CN 108867715A CN 201810556826 A CN201810556826 A CN 201810556826A CN 108867715 A CN108867715 A CN 108867715A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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Abstract
The invention discloses a kind of vacuum-electric osmose-high pressure joint reinforcement soft clay indoor model test devices and method; wherein vacuum-electric osmose-high pressure joint reinforcement soft clay indoor model test device includes model casing, low-pressure drainage system, electric osmose system and high-pressure aerated system, and the model casing is made of cylindrical body, model case lid, multiple high voltage protective system；The low-pressure drainage system includes vertical drainage body, sand bedding course, discharge pipe line, steam-water separation bottle, oil and gas separating bottle and the vacuum pump for being inserted into the soil body；The electric osmose system includes electrode, conducting wire and DC power supply；The high-pressure aerated system includes high-pressure inflating pump, gas tube and air-charged cap.Device through the invention can carry out the indoor model test of vacuum-electric osmose-high pressure joint reinforcement or independent role to soft clay sample, can be improved film internal and external pressure difference, while taking multiple protection measure to hyperbaric environment, make the uniform quick-discharging consolidation of soft clay.
Description
Technical field
The present invention relates to geotechnical engineering field, the indoor mould of especially a kind of vacuum-electric osmose-high pressure joint reinforcement soft clay
Type experimental rig and method, for accelerating the discharging consolidation of Soft Clay Foundation.
Background technique
A kind of limited resources of the soil as preciousness provide ecology for adjusting, purification, circulation and the buffering etc. of urban and rural environment
Service function, the mankind must sufficiently, reasonably develop and utilize every inch of land.It can not be kept away during developing and using soil
The meeting exempted from encounters Soft Clay Foundation geological conditions, and soft clay is distributed in coastal, river middle and lower reaches or lake in the neighbourhood more, has
The features such as natural moisture content is high, void ratio is big, compressibility is high, permeability is small.In recent years, Dredger Filling Engineering and dredging work day are cumulative
More, compared to the soft clay of crude sedimentation, water content is higher, intensity is lower, shows stronger deficient consolidation characteristics and compressible spy
Property.Many difficult and challenge is faced during developing and utilizing Soft Clay Foundation.
Draining concretion method is the common processing method of Soft Clay Foundation, including vacuum method, preloading, electro-osmosis method
Deng.Vacuum method is the draught head by being formed inside and outside film, and the soil body is made to generate consolidation pressure, film caused by existing research
The internal and external pressure difference atmospheric pressure that can not be above standard is about 100kPa, this makes vacuum method discharging consolidation rate-constrained in soft glutinous
The infiltration coefficient of soil, consolidation time is longer, limited to ground bearing power increase, is often only capable of forming one layer of crust layer.Preloading is pre-
Platen press is not enough to and easily leads to the problems such as Soft Clay Foundation unstability there are heap carrier material, and electric osmose rule, which exists, to be converged at cathode
Water not easily collecting the problems such as, existing Soft Clay Foundation processing method is difficult to obtain ideal consolidation effect.
Summary of the invention
Goal of the invention：Indoor model test device and the side of a kind of vacuum-electric osmose-high pressure joint reinforcement soft clay are provided
Method accelerates the discharging consolidation of soft clay, solves the above problem of the existing technology by improving film internal and external pressure difference.
Technical solution：A kind of indoor model test device of vacuum-electric osmose-high pressure joint reinforcement soft clay, including：
Staving, with one for containing the accommodating chamber and an open port of soft clay, staving side wall is provided with power supply line outlet and row
Water through-hole；
Case lid is adapted to staving, and for sealing the open port, safety valve, exhaust valve and air-charged cap, case are provided on case lid
Sealing rubber ring is provided between lid and staving；
Inflation unit, including inflator pump, the inflator pump is extended on the inside of case lid by gas tube, and is connected to air cap；
Electric osmose unit, the electrode including being located at staving two sides are connected and through power supply line outlet with the electrode and extend to staving
The conducting wire in outside, and the power supply being connect with conducting wire；
Drainage cell, including being located at the drainpipe on the inside of staving, one end of drainpipe is horizontally extending in staving, another
End extends to drainage hole, and the steam-water separation bottle being connect by connecting tube with the drainpipe is connected to the steam-water separation bottle
Oil and gas separating bottle, and the vacuum pump being connected to the oil and gas separating bottle；
It is provided with sand bedding course above the soft clay layer, the drainpipe is located in the sand bedding course, the top of the sand bedding course
It is laid with one layer of vacuum sealing film, the end of the vacuum sealing film is pressed between case lid and staving.
In a further embodiment, be spirally connected fixation between the case lid and staving.
In a further embodiment, the side of the case lid is provided with security window.
In a further embodiment, the part that the pressure limiting valve is located on the inside of lid is equipped with Anti-stop cover, described anti-blocking
It is provide with and is equipped with several through-holes, periphery or inner circumferential are provided with the filter cloth for covering the through-hole.
In a further embodiment, several aeration apertures are provided on the air-charged cap.
In a further embodiment, the rubber stopper of sealing is provided on power supply line outlet and drainpipe outlet.
In a further embodiment, several permeable holes are provided on the drainpipe.
In a further embodiment, the working pressure range of the safety valve is 120~150kPa.
A kind of indoor model test device of vacuum-electric osmose-high pressure joint reinforcement soft clay, including：
Cylindrical body, ladle body offer several outlets, can fill in rubber stopper, for being pierced by the pipeline arranged in model casing.
Model case lid, is connected through a screw thread with model casing, and model casing, which covers, is provided with safety valve, security window and pressure limiting valve.
Sealing rubber ring is placed on model casing and model case lid junction, on the one hand for preventing gas leakage, is on the other hand filling
When setting interior pressure and being more than 180kPa, can not release stress, security window is opened, and plays explosion-proof.
Pressure limiting valve, inside are equipped with exhaust pipe, and exhaust bottom of the tube is equipped with Anti-stop cover, and the dismountable cleaning of Anti-stop cover prevents soil
Grain blocking exhaust pipe.Pressure limiting valve is adjustable, for pressure in control device within the scope of 120~150kPa, when air pressure in device
More than 120kPa, pressure limiting bonnet can be jacked up, and the gas inside device is by the exhaust pipe discharge inside pressure limiting valve, when in device
Air pressure is lower than 120kPa, and pressure limiting valve falls under the effect of gravity, the exhaust pipe of closed interior.
Safety valve is no more than design value 160kPa for pressure in limits device, when pressure is more than the value in device, silicon
The safety valve of glue is extruded, and exhaust valve is opened, and opens protection.
High-pressure aerated system, high-pressure inflating pump are connect by gas tube with the air-charged cap inside device, air-charged cap whole body cloth
Full aeration aperture.
A kind of indoor model test method of vacuum-electric osmose-high pressure joint reinforcement soft clay, dress described in any of the above embodiments
It sets and includes the following steps：
S1, prefabricated soft clay soil sample layering is packed into model casing, and dense extrusion, by experimental design requirement into the soil body
It is inserted into electrode and vertical drainage body, and buries miniature pore water pressure tester and potential stylus in soil sample；By electrode with lead
Line connection, junction need to carry out water-proofing treatment, and the route of conducting wire and test pore water pressure and potential is passed through model casing respectively
The rubber stopper that bottleneck is filled in is pierced by model casing；Again by the positive and negative anodes of conducting wire and DC power supply connect, pore water pressure p-wire with
Data collecting instrument connection；
S2, it is laid with one layer of sand bedding course on soil sample surface, drainpipe is buried in sand bedding course, drainage hole is made on this section of drainpipe whole body
And wrap up filter membrane, drainpipe is pierced by model casing by the rubber stopper that model casing bottleneck is filled in, then successively with steam-water separation bottle, oil and gas
Separating bottle is connected with vacuum pump；
S3, it is laid with two layers of vacuum sealing film on sand bedding course surface, vacuum sealing film edge is stretched out outside model casing, stayed in model casing
There is the vacuum sealing film of predetermined size, in case vacuum diaphragm is closely affixed with sand bedding course after soil sample sedimentation；
S4, gas tube one end be connected with high-pressure inflating pump, the other end is connect with the air-charged cap that model casing covers, finally by model
Case lid and model casing are screwed by screw thread, complete the installation of experimental rig；
S5, vacuum pump, DC power supply and high-pressure inflating pump are opened according to test requirements document, realizes vacuum-electric osmose-high pressure joint reinforcement
Soft clay indoor model test.
Preferably, the infiltration coefficient of Soft Clay Foundation is 10-6~10-8cm/s。
Beneficial effect：Indoor model test device and processing method of the invention can carry out vacuum-to soft clay sample
The indoor model test of electric osmose-high pressure joint reinforcement or independent role has good sealing performance, can be improved external pressure in film
Power is poor, while taking multiple protection measure to hyperbaric environment, makes the uniform quick-discharging consolidation of soft clay.The configuration of the present invention is simple,
It is easy to operate, new approaches are provided for Soft Clay Foundation processing.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the structural schematic diagram of Anti-stop cover of the present invention.
Fig. 3 is the structural schematic diagram of safety valve of the present invention.
In figure, each appended drawing reference is：Soft clay 1, staving 2, electrode 3, conducting wire 4, rubber stopper 5, sand bedding course 6, vacuum sealing
Film 7, safety valve 8, air-charged cap 9, gas tube 10, steam-water separation bottle 11, oil and gas separating bottle 12, high-pressure inflating pump 13, vacuum pump 14,
DC power supply 15, sealing rubber ring 16, security window 17, pressure limiting valve 18, filter cloth 19, Anti-stop cover 20, stomata 21, exhaust pipe 22, nut
23, exhaust valve 24.
Specific embodiment
As shown in Figure 1, indoor model test device of the invention mainly includes two components, i.e. cylindrical body 2 and mould
Molding box lid.Several bottlenecks are offered on staving 2, Innex cork of bottleneck enters rubber stopper 5.Model casing is covered equipped with multiple protection measure,
Including pressure limiting valve 18, safety valve 8 and security window 17.Pressure limiting valve 18 is adjustable, has Telescopic, for pressure in control device
Within the scope of 120~150kPa, when air pressure is more than 120kPa in device, pressure limiting valve 18 can be jacked up, and the gas inside device is logical
The exhaust pipe 22 crossed inside pressure limiting valve 18 is discharged, and when air pressure is lower than 120kPa in device, pressure limiting valve 18 falls under the effect of gravity,
The exhaust pipe 22 of closed interior.22 bottom of exhaust pipe inside pressure limiting valve 18 is equipped with Anti-stop cover 20, and Anti-stop cover 20 is installed on model
The inside of case lid, dismountable cleaning prevent soil particle from blocking exhaust pipe 22, and pressure limiting valve 18 is installed with Anti-stop cover 20 by nut 23
In model case lid.Safety valve 8 is no more than design value 160kPa for pressure in limits device, when pressure is more than the value in device
When, the safety valve 8 of silica gel is extruded, and exhaust valve 24 is opened, and opens protection.High-pressure inflating pump 13 passes through gas tube 10 and device
Internal air-charged cap 9 connects, and 9 whole body of air-charged cap is covered with aeration aperture 21.Model case lid is connected through a screw thread with cylindrical body 2,
Sealing rubber ring 16 is placed in junction, and on the one hand for preventing gas leakage, on the other hand pressure is more than 180kPa, can not release in the device
When bleeding off pressure power, security window 17 is opened, and plays explosion-proof.
Fig. 2 is the structural schematic diagram of Anti-stop cover 20, and Anti-stop cover 20 is fixed on model case lid by nut 23, and there is exhaust in inside
Pipe 22.The gas vent 21 of several thin-and-longs is begun on the side wall of Anti-stop cover 20, is disposed with filter cloth 19 at gas vent 21, is prevented soil
Particle blocks exhaust passage.
In design/production, organic glass production, the material of model casing and model case lid is can be used in model casing and model case lid
Matter is organic glass, and model casing internal diameter is 30-80cm, and wall thickness 2-5mm, the bottleneck diameter that model casing is opened up is 6-10cm；
20 internal diameter of Anti-stop cover is 2-3cm, is highly 2-3cm, wall thickness 1-2mm；The length of security window 17 is 8-10cm, is highly 1-
2cm；10 internal diameter of gas tube is 2-3cm, wall thickness 1.5-3mm.
A kind of indoor model test method of vacuum-electric osmose-high pressure joint reinforcement soft clay 1 is based on any of the above-described implementation
Device described in example and including following rapid：
S1, prefabricated 1 soil sample of soft clay layering is packed into model casing, and dense extrusion, by experimental design requirement to the soil body
Interior insertion electrode 3 and vertical drainage body, and the elements such as miniature pore water pressure tester, potential stylus are buried in soil sample；It will
Electrode 3 is connect with conducting wire 4, and junction need to carry out water-proofing treatment, and the route of conducting wire 4 and test pore water pressure and potential is distinguished
The rubber stopper 5 filled in by model casing bottleneck is pierced by model casing；Conducting wire 4 is connect with the positive and negative anodes of DC power supply 15 again, hole
Water pressure p-wire is connect with data collecting instrument；
S2, it is laid with the sand bedding course 6 of one layer of 10cm thickness on soil sample surface, drainpipe is buried in sand bedding course 6, this section of drainpipe whole body is beaten
Filter membrane is simultaneously wrapped up in set solid water hole, and the rubber stopper 5 that drainpipe is filled in by model casing bottleneck is pierced by model casing, then successively divides with carbonated drink
It is connected from bottle 11, oil and gas separating bottle 12 and vacuum pump 14；
S3, it is laid with two layers of vacuum sealing film 7 on 6 surface of sand bedding course, 7 edge of vacuum sealing film stretches out outside model casing, need to be in model
Plentiful vacuum sealing film 7 is reserved in case, in case vacuum diaphragm is closely affixed with sand bedding course 6 after soil sample sedimentation；
S4, gas tube 10 one end be connected with high-pressure inflating pump 13, the other end is connect with the air-charged cap 9 that model casing covers, finally
Model case lid and model casing are screwed by screw thread, complete the installation of experimental rig；
S5, vacuum pump 14, DC power supply 15 and high-pressure inflating pump 13 are opened according to test requirements document, realizes vacuum-electric osmose-high pressure connection
It closes and reinforces 1 indoor model test of soft clay.
It should be noted that in step sl, the bottleneck of the model casing need to be sealed with rubber stopper 5,5 center of rubber stopper is beaten
In case the pipeline in model casing is pierced by, a bottleneck can be pierced by several pipelines in hole, be pierced by position and play sealant sealing.
In step s 2, the bottleneck of steam-water separation bottle 11 and oil and gas separating bottle 12 still uses rubber stopper 5 to seal, and drainpipe is logical
It crosses rubber stopper 5 and traverses into or out bottleneck.There is scale that can measure displacement on steam-water separation bottle 11.
In step s 4, there is screw thread in 10 end of gas tube, and there is screw thread on 9 top of air-charged cap, the spiral shell with side inside and outside model case lid
Mother 23 connects, and external nut 23 is connect with gas tube 10, and internal nut 23 is connect with air-charged cap 9.
In step s 5, after high-pressure aerated system is opened, the multiple protection measure that model casing covers installation helps to prevent
Hypertonia in locking apparatus needs to be then turned on model case lid after air pressure in device drops to standard atmospheric pressure after the test.This dress
Though setting has multiple protection measure to high-pressure system, still require that user and device take precautions against jointly in use, safe makes
Use the present apparatus.
In a further embodiment, it is provided with water quantity detector on steam-water separation bottle, volume is detected according to water and is calculated
The variation of water water time, to calculate the parameter with regulation experiment device, the efficiency of more each drainaging scheme.
In short, a kind of indoor model test device of vacuum-electric osmose-high pressure joint reinforcement soft clay provided by the invention has
It has the advantage that：First, the indoor mould of vacuum-electric osmose-high pressure joint reinforcement or independent role can be carried out to soft clay sample
Type test, has good sealing performance, can be improved film internal and external pressure difference, while taking multiple protective to arrange hyperbaric environment
It applies, makes the uniform quick-discharging consolidation of soft clay 1.Second, the configuration of the present invention is simple is easy to operate, mentions for Soft Clay Foundation processing
New approaches are supplied.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail a variety of equivalents can be carried out to technical solution of the present invention within the scope of the technical concept of the present invention, this
A little equivalents all belong to the scope of protection of the present invention.
Claims (9)
1. a kind of vacuum-electric osmose-high pressure joint reinforcement soft clay indoor model test device, which is characterized in that including：
Staving, with one for containing the accommodating chamber and an open port of soft clay, staving side wall is provided with power supply line outlet and row
Pipe outlet；
Case lid is adapted to staving, and for sealing the open port, safety valve, exhaust valve and air-charged cap, case are provided on case lid
Sealing rubber ring is provided between lid and staving；
Inflation unit, including inflator pump, the inflator pump is extended on the inside of case lid by gas tube, and is connected to air cap；
Electric osmose unit, the electrode including being located at staving two sides are connected and through power supply line outlet with the electrode and extend to staving
The conducting wire in outside, and the power supply being connect with conducting wire；
Drainage cell, including being located at the drainpipe on the inside of staving, one end of drainpipe is horizontally extending in staving, another
End extends to drainage hole, and the steam-water separation bottle being connect by connecting tube with the drainpipe is connected to the steam-water separation bottle
Oil and gas separating bottle, and the vacuum pump being connected to the oil and gas separating bottle；
It is provided with sand bedding course above the soft clay layer, the drainpipe is located in the sand bedding course, the top of the sand bedding course
It is laid with one layer of vacuum sealing film, the end of the vacuum sealing film is pressed between case lid and staving.
2. vacuum-electric osmose according to claim 1-high pressure joint reinforcement soft clay indoor model test device, special
Sign is that be spirally connected fixation between the case lid and staving.
3. vacuum-electric osmose according to claim 1-high pressure joint reinforcement soft clay indoor model test device, special
Sign is that the side of the case lid is provided with security window.
4. vacuum-electric osmose according to claim 1-high pressure joint reinforcement soft clay indoor model test device, special
Sign is that the part that the pressure limiting valve is located on the inside of lid is equipped with Anti-stop cover, and the Anti-stop cover is provided with several through-holes, periphery
Or inner circumferential is provided with the filter cloth for covering the through-hole.
5. vacuum-electric osmose according to claim 1-high pressure joint reinforcement soft clay indoor model test device, special
Sign is, several aeration apertures are provided on the air-charged cap.
6. vacuum-electric osmose according to claim 1-high pressure joint reinforcement soft clay indoor model test device, special
Sign is, the rubber stopper of sealing is provided in the power supply line outlet and drainage hole.
7. vacuum-electric osmose according to claim 1-high pressure joint reinforcement soft clay indoor model test device, special
Sign is that the part that the drainpipe is embedded in sand bedding course is provided with several permeable holes.
8. vacuum-electric osmose according to claim 1-high pressure joint reinforcement soft clay indoor model test device, special
Sign is that the working pressure range of the safety valve is 120~150kPa.
9. a kind of vacuum-electric osmose-high pressure joint reinforcement soft clay indoor model test method, which is characterized in that be based on right
It is required that 1 to 8 described in any item devices and including the following steps：
S1, prefabricated soft clay soil sample layering is packed into staving, and dense extrusion, by experimental design requirement to soil body interpolation
Enter electrode and vertical drainage body, and buries miniature pore water pressure tester and potential stylus in soil sample；By electrode and conducting wire
Connection, junction need to carry out water-proofing treatment, and the route of conducting wire and test pore water pressure and potential is passed through staving power supply respectively
The rubber stopper that line outlet is filled in is pierced by staving；Again by the positive and negative anodes of conducting wire and DC power supply connect, pore water pressure p-wire with
Data collecting instrument connection；
S2, it is laid with one layer of sand bedding course on soil sample surface, drainpipe is buried in sand bedding course, drainage hole is made on this section of drainpipe whole body
And wrap up filter membrane, drainpipe is pierced by staving by the rubber stopper that staving drainpipe outlet is filled in, then successively with steam-water separation bottle, oil
Vapour separating bottle is connected with vacuum pump；
S3, it is laid with two layers of vacuum sealing film on sand bedding course surface, vacuum sealing film edge stretches out outside staving, and there are pre- in staving
The vacuum sealing film of scale cun, in case vacuum diaphragm is closely affixed with sand bedding course after soil sample sedimentation；
S4, gas tube one end be connected with high-pressure inflating pump, the other end is connect with the air-charged cap on case lid, finally by case lid and bucket
Body is screwed by screw thread, completes the installation of experimental rig；
S5, vacuum pump, DC power supply and high-pressure inflating pump are opened according to test requirements document, realizes vacuum-electric osmose-high pressure joint reinforcement
Soft clay indoor model test.
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| CN201810556826.4A CN108867715A (en) | 2018-06-01 | 2018-06-01 | A kind of indoor model test device and method of vacuum-electric osmose-high pressure joint reinforcement soft clay |
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| CN201810556826.4A CN108867715A (en) | 2018-06-01 | 2018-06-01 | A kind of indoor model test device and method of vacuum-electric osmose-high pressure joint reinforcement soft clay |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109465290A (en) * | 2019-01-07 | 2019-03-15 | 南通大学 | System and processing method for repairing heavy metal pollution soil |
| CN110031400A (en) * | 2019-05-05 | 2019-07-19 | 中交疏浚技术装备国家工程研究中心有限公司 | For dredging the multi-function device of cutter tooth and the measurement of clay adhesion strength and cutter tooth optimization |
| CN112946238A (en) * | 2021-01-29 | 2021-06-11 | 天津大学 | Seabed soft clay consolidation test method |
| CN112985936A (en) * | 2021-01-29 | 2021-06-18 | 天津大学 | Seabed soft clay consolidation test system |
| CN113123316A (en) * | 2021-04-08 | 2021-07-16 | 南通大学 | Device and method for testing effective potential of soil body in real time in soft clay electroosmosis process |
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| CN104988956A (en) * | 2015-05-20 | 2015-10-21 | 河海大学 | Device for testing stress condition of pile group under asymmetric edge loads |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109465290A (en) * | 2019-01-07 | 2019-03-15 | 南通大学 | System and processing method for repairing heavy metal pollution soil |
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| CN110031400B (en) * | 2019-05-05 | 2024-01-02 | 中交疏浚技术装备国家工程研究中心有限公司 | Multifunctional device for measuring adhesion force between dredging cutter tooth and clay and optimizing cutter tooth |
| CN112946238A (en) * | 2021-01-29 | 2021-06-11 | 天津大学 | Seabed soft clay consolidation test method |
| CN112985936A (en) * | 2021-01-29 | 2021-06-18 | 天津大学 | Seabed soft clay consolidation test system |
| CN112985936B (en) * | 2021-01-29 | 2022-04-22 | 天津大学 | Seabed soft clay consolidation test system |
| CN112946238B (en) * | 2021-01-29 | 2022-05-03 | 天津大学 | Seabed soft clay consolidation test method |
| CN113123316A (en) * | 2021-04-08 | 2021-07-16 | 南通大学 | Device and method for testing effective potential of soil body in real time in soft clay electroosmosis process |
| CN113123316B (en) * | 2021-04-08 | 2022-03-08 | 南通大学 | Device and method for testing effective potential of soil body in real time in soft clay electroosmosis process |
| WO2022105103A1 (en) * | 2021-04-08 | 2022-05-27 | 南通大学 | Apparatus and method for testing effective electric potential of soil mass in real time using soft clay electroosmosis process |
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