CN107246983A - A kind of coarse-grained soil super-pressure Particle Breakage interior compression experimental rig - Google Patents
A kind of coarse-grained soil super-pressure Particle Breakage interior compression experimental rig Download PDFInfo
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- CN107246983A CN107246983A CN201710264398.3A CN201710264398A CN107246983A CN 107246983 A CN107246983 A CN 107246983A CN 201710264398 A CN201710264398 A CN 201710264398A CN 107246983 A CN107246983 A CN 107246983A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
Abstract
The invention discloses a kind of coarse-grained soil super-pressure Particle Breakage interior compression experimental rig, including forcing press top plate, pressure machine bottom board, force-transmitting block, work casing, super-pressure hard compression cylinder, displacement transducer, sensor for pore water pressure, pore pressure valve, lower ports valve, coarse-grained soil specimen, high pressure cylinder base, porous plate, geotechnological anti-filter cloth, levelling mattress, stiffness bearer, fixing bolt, sealing collar and ring-type shirt rim wing plate.The present invention can directly use chamber internal surface vibratory compaction instrument or the direct sample preparation cell cube sample of heavy compaction instrument in super-pressure hard compression cylinder, using room pressure machine platform oil circuit connection loading robot control system(RCS) with compression displacement from extraction system, the loading automatic control and data that super-pressure Particle Breakage compression test etc. can be achieved are adopted certainly.Sample prepares simple specification, and test operation is convenient, flexible, and test system data acquisition is complete, precision is improved, with good research value and future in engineering applications.
Description
Technical field
The present invention relates to Geotechnical Engineering indoor unit body experimental technique field, especially a kind of coarse-grained soil super-pressure particle is broken
Broken interior compression experimental rig.
Background technology
Modern Soil Mechanics experimental study starts to pay attention to soil particle Crushing Problem.The especially earth structure such as superelevation earth and rockfill dam,
Coarse soil particles high stress level crushes creep and stable problem；The Particle Breakage of soft coarse granule earth working material and its creep with
Stabilizing influence mechanism, has become one of contemporary Geotechnical Engineering field hot issue.In addition, for the critical condition soil of coarse-grained soil
In mechanics intrinsic compression line laboratory test research, Vertic features primary and secondary consolidates the middle and high stress of coupling mechanism experimental study to stream admittedly
During level in the accumulative plastic deformation experimental study of cyclic load, particle high-pressure breaking mechanism may relate to.In recent years harbour,
During the infrastructure engineerings such as airport are built, frequently encounter coarse-grained soil and fill superelevation earth structure correlation engineering problem, it is especially southern
In the engineering constructions such as sea island reef hydraulic reclamation airport, coral debris coarse grain soil material turns into indispensable and fills material with geotechnique that is substituting
Material, and coral debris coarse granule is typical soft special-shaped particle, particle is broken to have become influence coral debris thing geotechnique's knot
One of important mechanisms of structure performance.
At present, fine grained soil high-pressure consolidation apparatus stress level is actually rare more than 16MPa.However, broken on ultra high pressure compression
Broken cell cube shop test equipment, is not included in related earthwork test rule so far, and pressure reaches 100MPa super-pressure Particle Breakages
Compression set, is even more rarely reported.Soft frangible coarse soil particles are compressed to crush laboratory test and there is above mentioned problem, fail so far
Improved.
The content of the invention
The technical problems to be solved by the invention are that there is provided a kind of experiment of coarse-grained soil super-pressure Particle Breakage interior compression
Device, the loading automatic control and data that can realize super-pressure Particle Breakage compression test etc. is adopted certainly.
In order to solve the above technical problems, the present invention provides a kind of coarse-grained soil super-pressure Particle Breakage interior compression experiment dress
Put, including：Forcing press top plate 1, pressure machine bottom board 2, force-transmitting block 3, work casing 4, super-pressure hard compression cylinder 5, displacement sensing
Device 6, sensor for pore water pressure 7, pore pressure valve 8, lower ports valve 9, coarse-grained soil specimen 10, high pressure cylinder base 11, porous plate 12, geotechnological anti-filter cloth
13rd, mattress levelling 14, stiffness bearer 15, fixing bolt 16, sealing collar 17 and ring-type shirt rim wing plate 26；Super-pressure hard compression cylinder
5 are welded as a whole with ring-type shirt rim wing plate 26, and porous plate 12 and geotechnological anti-filter cloth 13 are equipped with ring-type shirt rim wing plate 26, is surpassed
High-pressure rigid compression cylinder 5 and coarse-grained soil specimen 10, porous plate 12, geotechnological anti-filter cloth 13 are arranged on high pressure cylinder base 11 in the lump,
Ring-type shirt rim wing plate 26 is fastenedly connected with high pressure cylinder base 11, and sealing collar 17 is set on ring-type shirt rim wing plate 26；High pressure cylinder base
Pore pressure valve 8 and lower ports valve 9 are provided with 11, displacement transducer 6, ring-type shirt rim are installed between force-transmitting block 3 and pressure machine bottom board 2
The both sides of wing plate 26 are provided with sensor for pore water pressure 7, and the top of super-pressure hard compression cylinder 5 is provided with work casing 4, force-transmitting block 3
Top is provided with forcing press top plate 1.
It is preferred that, the high pressure cover plate 18 with sealing collar 17 and geotechnological anti-filter cloth 13 are fastened by fixing bolt 16
In high pressure cylinder top surface, it is ensured that the top of super-pressure hard compression cylinder 5 is sealed.
It is preferred that, three connection water routes and its block valve are set in high pressure cylinder base 11, and ports valve works respectively under base
Water route and two are arranged symmetrically pore pressure valve water route；Lower ports valve water route is connected with degassing water pot 19 and vacuum tank 21；Deaerate water pot 19
After water filling, a pair of pore pressure valves 8 are in connected state, open lower ports valve 9 and air bleeding valve 24, carry out head pressure seepage flow degassing, hole
During 8 seepage stability of pressure valve, close, proceeded to after the seepage stability of vacuum tank 21 in advance, close air bleeding valve 24；Start vavuum pump 23,
Extraction valve 22 is opened, progress vacuumizes saturation, after vacuum seepage is stable, closes extraction valve 22；When needing, one can be opened again
To pore pressure valve 8, the secondary degassing in water route for carrying out head pressure seepage pore pressure sensor 7 by degassing water pot 19 is oozed out after stabilization, is closed
Closed pore pressure valve 8；Coordinated in real time using water compensating valve 20, extraction valve 22 and draining valve 25, adjustment degassing water pot 19 and vacuum tank 21
Working water level.
It is preferred that, displacement transducer 6 and sensor for pore water pressure 7 access together automatic control with from extraction system.
Beneficial effects of the present invention are：Can in super-pressure hard compression cylinder directly use chamber internal surface vibratory compaction instrument or
The direct sample preparation cell cube sample of heavy compaction instrument, using room pressure machine platform oil circuit connection loading robot control system(RCS) and compressed-bit
Extraction system is moved from, the loading automatic control and data that super-pressure Particle Breakage compression test etc. can be achieved are adopted certainly.Sample prepares simple rule
Model, test operation is convenient, flexible, and test system data acquisition is complete, precision is improved, with good research value and work
Journey application prospect.
Brief description of the drawings
Fig. 1 is apparatus of the present invention front view.
Fig. 2 is apparatus of the present invention left view.
Fig. 3 is high pressure cylinder understructure schematic diagram of the invention.
Fig. 4 is sample saturation device structural representation of the invention.
Embodiment
As illustrated in fig. 1 and 2, a kind of coarse-grained soil super-pressure Particle Breakage interior compression experimental rig, including：Forcing press top
Plate, pressure machine bottom board, force-transmitting block, work casing, super-pressure hard compression cylinder, displacement transducer, sensor for pore water pressure, pore pressure valve,
Lower ports valve, coarse-grained soil specimen, high pressure cylinder base, porous plate, geotechnological anti-filter cloth, levelling mattress, stiffness bearer, fixing bolt, only
Hydrosphere and ring-type shirt rim wing plate；Super-pressure hard compression cylinder is welded as a whole with ring-type shirt rim wing plate, ring-type shirt rim wing plate
Interior outfit porous plate and geotechnological anti-filter cloth, super-pressure hard compression cylinder and coarse-grained soil specimen, porous plate, geotechnological anti-filter cloth are pacified in the lump
On high pressure cylinder base, ring-type shirt rim wing plate is fastenedly connected with high pressure cylinder base, and sealing collar is set on ring-type shirt rim wing plate；It is high
Pore pressure valve and lower ports valve are provided with pressure cylinder base, displacement transducer, ring-type skirt are installed between force-transmitting block and pressure machine bottom board
The both sides of side wing plate are provided with sensor for pore water pressure, and super-pressure hard compression cylinder top is provided with work casing, the top of force-transmitting block
It is provided with forcing press top plate.
As shown in Figures 3 and 4, three connection water routes and its block valve, respectively ports valve under base are set in high pressure cylinder base
Work water route, two be arranged symmetrically pore pressure valve water route.Lower ports valve water route and degassing water pot, the connection of vacuum tank.Deaerate water pot note
After water, when a pair of pore pressure valves are in UNICOM's state, lower ports valve and air bleeding valve are opened, head pressure seepage flow degassing, pore pressure valve is carried out
During seepage stability, close, proceeded to after vacuum tank seepage stability in advance, close air bleeding valve；Start vavuum pump, open extraction valve,
Progress vacuumizes saturation, after vacuum seepage is stable, closes extraction valve；When needing, a pair of pore pressure valves can be opened again, by deaerating
Water pot carries out the secondary degassing in head pressure seepage pore pressure sensor water route, oozes out after stabilization, closes pore pressure valve.Aforesaid operations step
In, water compensating valve, extraction valve and draining valve should be used to coordinate in good time, adjustment degassing water pot and vacuum tank working water level.
After sample saturation deaerates with water route, remove after high pressure cover plate, be attached to as shown in Figure 1 on pressure machine bottom board, and
Centering；Sand mattress in high pressure cylinder top work casing, the specimen surface that paves is installed levelling, installation stiffness bearer and force-transmitting block, with
Forcing press top plate contact；Displacement transducer between force-transmitting block and pressure machine bottom board is installed, access computer automatic control is complete from extraction system
Preparation before into loading.Facility is adopted in displacement, sensor for pore water pressure data certainly, and its is loaded in combination certainly with pressure machine hydraulic system
Control system, belongs to the basic problem in hydraulic self-control field, repeats no more.
Further illustrate that different tests operating procedure of the present invention is as follows：
Prepared by sample, DN150 super-pressure hard compression cylinder is placed on the closely knit instrument base of surface vibration in the present invention, as
Compaction cylinder, porous plate and geotechnological anti-filter cloth are placed in DN150 super-pressure hard compression cylinder bottom, the closely knit preparation Φ of layered vibration
150 coarse grain soil unit samples, sample nominal upper limit particle size is 30mm, is not repeated.
Base is connected, and installs sealing collar on high pressure cylinder base, then DN150 super-pressure hard compression cylinder is tried together with coarse-grained soil
Sample, porous plate and geotechnological anti-filter cloth, are attached on high pressure cylinder base, fixing bolt fastening；
Sample saturation, installs high pressure cover plate and sealing collar, fixing bolt fit sealing；Connect high pressure cover plate and vacuum
Tank draining water route, connects ports valve water route and degassing water pot under high pressure cylinder base；Then proceed as follows：
Sensor for pore water pressure water route deaerates, and deaerate water pot water filling, opens lower ports valve, pore pressure valve, carries out pore pressure valve water route degassing,
After the seepage stability of water route, a pair of pore pressure valves of base are closed；
Coarse-grained soil specimen head degassing saturation, deaerate the in good time moisturizing of water pot, opens extraction valve, air bleeding valve, carries out head thick
Grain soil sample degassing saturation, to vacuum tank seepage stability, closes air bleeding valve；
Coarse-grained soil specimen vacuumizes saturation, and deaerate the in good time moisturizing of water pot, and opens draining valve adjustment vacuum tank as needed
Water level, opens vavuum pump and extraction valve, vacuumizes after saturation, closes vavuum pump, extraction valve and lower ports valve.
General assembly is tested, DN150 super-pressure hard compression cylinder is placed in pressure together with coarse-grained soil specimen and high pressure cylinder base
On machine bottom board, high pressure cover plate is removed, high pressure cylinder work casing, stiffness bearer and force-transmitting block contact connection are installed；Displacement is installed
Sensor accesses automatic control with from extraction system, completing experiment preparation in the lump with sensor for pore water pressure.
Test operation, the present invention proposes a kind of 100MPa super-pressure Particle Breakage compression test device, sample super-pressure
Grain composition change before and after loading compression, describes Particle Breakage feature.Due to using standard surface vibratory compaction instrument, during experiment
Two parts of identical coarse-grained soils of parallel preparation are got the raw materials ready, and portion is used for routine DN150 surface vibration compaction tests；Portion is used for DN150
High pressure cylinder super-pressure Particle Breakage compression test.The Grading feature of the closely knit sample of surface vibration can be used as super-pressure Particle Breakage pressure
Contracted the grain composition initial value tested, and the level after high-pressure breaking compression test is contrasted with test result with grain composition initial value
Analysis, discloses coarse-grained soil super-pressure Particle Breakage mechanism, and specific soil test method is pressed related code and performed, repeats no more.
In addition, super-pressure Particle Breakage compression Vertic features include：Compression lasts feature, compression and resilience
Feature and circulating plastic deformation behaviour, are described below：
I compressions last feature, and super-pressure is once loaded, can be using load speed and rate of displacement controlled loading speed
Rate；It is loaded onto after predetermined value, steady load is maintained using corresponding servo techniques, until compression displacement is stable；Then control unloading
Speed is unloaded.Compression-loaded stage, sustained loading stage and unloading phase overall process, automatic data collection sample compression.
After off-test, device is removed, sample is exited, Particle Breakage rear class is carried out with experiment.In addition, saturated sample need to be by said sample
Saturation is operated, and the above-mentioned whole reading super quiet pore pressure of base of surveying is gathered and dissipation data；Unsaturation sample, can cancel above-mentioned step
Suddenly.
II compresses and resilience feature, using multi-stage loading and unloading manner, consolidates, no longer goes to live in the household of one's in-laws on getting married similar to conventional high-pressure
State.Other steps, with above-mentioned I.
III cyclic load accumulating plastic deformations, are once loaded onto setting dead load, maintain after servo-stabilization；By setting width
Value applies low frequency cyclic load, until accumulating compression stabilization；Unloading, and terminate experiment.Other steps, with above-mentioned I.
Although the present invention is illustrated and described with regard to preferred embodiment, it is understood by those skilled in the art that
Without departing from scope defined by the claims of the present invention, variations and modifications can be carried out to the present invention.
Claims (4)
1. a kind of coarse-grained soil super-pressure Particle Breakage interior compression experimental rig, it is characterised in that including：Forcing press top plate (1),
Pressure machine bottom board (2), force-transmitting block (3), work casing (4), super-pressure hard compression cylinder (5), displacement transducer (6), pore pressure are passed
Sensor (7), pore pressure valve (8), lower ports valve (9), coarse-grained soil specimen (10), high pressure cylinder base (11), porous plate (12), geotechnological anti-filter
Cloth (13), mattress levelling (14), stiffness bearer (15), fixing bolt (16), sealing collar (17) and ring-type shirt rim wing plate (26)；It is super
High-pressure rigid compression cylinder (5) is welded as a whole with ring-type shirt rim wing plate (26), is equipped with ring-type shirt rim wing plate (26) porous
Plate (12) and geotechnological anti-filter cloth (13), super-pressure hard compression cylinder (5) and coarse-grained soil specimen (10), porous plate (12), geotechnique are anti-
Filter cloth (13) is arranged on high pressure cylinder base (11) in the lump, and ring-type shirt rim wing plate (26) is fastenedly connected with high pressure cylinder base (11),
Sealing collar (17) is set on ring-type shirt rim wing plate (26)；Pore pressure valve (8) and lower ports valve (9) are provided with high pressure cylinder base (11),
Displacement transducer (6) is installed, the both sides of ring-type shirt rim wing plate (26) are provided between force-transmitting block (3) and pressure machine bottom board (2)
Work casing (4) is installed above sensor for pore water pressure (7), super-pressure hard compression cylinder (5), force-transmitting block is provided with above (3)
Forcing press top plate (1).
2. coarse-grained soil super-pressure Particle Breakage interior compression experimental rig as claimed in claim 1, it is characterised in that will carry
The high pressure cover plate (18) of sealing collar (17) and geotechnological anti-filter cloth (13), high pressure cylinder top surface is fastened on by fixing bolt (16),
Ensure to seal at the top of super-pressure hard compression cylinder (5).
3. coarse-grained soil super-pressure Particle Breakage interior compression experimental rig as claimed in claim 1, it is characterised in that high pressure cylinder
Three connection water routes and its block valve, ports valve work water route and two symmetrical arrangement of holes respectively under base are set in base (11)
Pressure valve water route；Lower ports valve water route is connected with degassing water pot (19) and vacuum tank (21)；After degassing water pot (19) water filling, a pair of pore pressures
Valve (8) is in connected state, opens lower ports valve (9) and air bleeding valve (24), carries out head pressure seepage flow degassing, pore pressure valve (8) is oozed
When stream is stable, closes, proceeded to after vacuum tank (21) seepage stability in advance, close air bleeding valve (24)；Start vavuum pump (23), beat
Extraction valve (22) is opened, progress vacuumizes saturation, after vacuum seepage is stable, closes extraction valve (22)；When needing, it can open again
A pair of pore pressure valves (8), the secondary degassing in water route of head pressure seepage pore pressure sensor (7) is carried out by degassing water pot (19), is oozed out
After stable, pore pressure valve (8) is closed；Coordinated in real time using water compensating valve (20), extraction valve (22) and draining valve (25), adjust de aerated water
The working water level of tank (19) and vacuum tank (21).
4. coarse-grained soil super-pressure Particle Breakage interior compression experimental rig as claimed in claim 1, it is characterised in that displacement is passed
Sensor (6) and sensor for pore water pressure (7) access together automatic control with from extraction system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710264398.3A CN107246983A (en) | 2017-04-21 | 2017-04-21 | A kind of coarse-grained soil super-pressure Particle Breakage interior compression experimental rig |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710264398.3A CN107246983A (en) | 2017-04-21 | 2017-04-21 | A kind of coarse-grained soil super-pressure Particle Breakage interior compression experimental rig |
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| CN107246983A true CN107246983A (en) | 2017-10-13 |
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| CN201710264398.3A Pending CN107246983A (en) | 2017-04-21 | 2017-04-21 | A kind of coarse-grained soil super-pressure Particle Breakage interior compression experimental rig |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896372A (en) * | 2018-07-24 | 2018-11-27 | 武汉科技大学 | A kind of CT scan sample preparation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2532480Y (en) * | 2002-03-22 | 2003-01-22 | 中国矿业大学 | Auxiliary device for cracked rock and non-consolidation porous material permeability test |
| CN1687739A (en) * | 2005-05-11 | 2005-10-26 | 中国矿业大学 | Testing method of polyphase coupling creep of fragmented rock body and equipment thereof |
| CN102175529A (en) * | 2011-01-26 | 2011-09-07 | 徐州师范大学 | Creep permeation full-distance coupling test system for broken rock sample |
| CN205246498U (en) * | 2015-12-28 | 2016-05-18 | 石家庄经济学院 | Infiltration consolidation apparatus |
-
2017
- 2017-04-21 CN CN201710264398.3A patent/CN107246983A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2532480Y (en) * | 2002-03-22 | 2003-01-22 | 中国矿业大学 | Auxiliary device for cracked rock and non-consolidation porous material permeability test |
| CN1687739A (en) * | 2005-05-11 | 2005-10-26 | 中国矿业大学 | Testing method of polyphase coupling creep of fragmented rock body and equipment thereof |
| CN102175529A (en) * | 2011-01-26 | 2011-09-07 | 徐州师范大学 | Creep permeation full-distance coupling test system for broken rock sample |
| CN205246498U (en) * | 2015-12-28 | 2016-05-18 | 石家庄经济学院 | Infiltration consolidation apparatus |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896372A (en) * | 2018-07-24 | 2018-11-27 | 武汉科技大学 | A kind of CT scan sample preparation device |
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Application publication date: 20171013 |
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