CN109655391A - A kind of material of rock and soil breakthrough of gas/Penetration Signature double Mode Control test macro - Google Patents
A kind of material of rock and soil breakthrough of gas/Penetration Signature double Mode Control test macro Download PDFInfo
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- CN109655391A CN109655391A CN201811376102.8A CN201811376102A CN109655391A CN 109655391 A CN109655391 A CN 109655391A CN 201811376102 A CN201811376102 A CN 201811376102A CN 109655391 A CN109655391 A CN 109655391A
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- 238000012360 testing method Methods 0.000 title claims abstract description 134
- 239000000463 material Substances 0.000 title claims abstract description 53
- 239000011435 rock Substances 0.000 title claims abstract description 49
- 239000002689 soil Substances 0.000 title claims abstract description 48
- 230000035515 penetration Effects 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 40
- 239000010959 steel Substances 0.000 claims abstract description 40
- 230000035699 permeability Effects 0.000 claims abstract description 23
- 239000012530 fluid Substances 0.000 claims abstract description 9
- 238000013022 venting Methods 0.000 claims abstract description 5
- 230000008859 change Effects 0.000 claims description 9
- 230000004888 barrier function Effects 0.000 abstract description 4
- 238000012512 characterization method Methods 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 76
- 238000004088 simulation Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 11
- 238000005259 measurement Methods 0.000 description 8
- 239000000440 bentonite Substances 0.000 description 7
- 229910000278 bentonite Inorganic materials 0.000 description 7
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000008595 infiltration Effects 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- 239000012466 permeate Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012857 repacking Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 230000009919 sequestration Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A kind of material of rock and soil breakthrough of gas/Penetration Signature double Mode Control test macro, including gas source, booster pump, high pressure fracturing/breakthrough test module is 1., 2. and mass spectrograph low-pressure permeability test module, 1. high pressure fracturing/breakthrough test module includes sequentially connected valve A, first steel cylinder, upper gas exhaust piping, valve C, test table M1, valve E, first pressure room, test table M3 and upper tail end venting mouth, it includes sequentially connected pressure regulator valve that low pressure, which simulates branch, valve B, second steel cylinder, lower gas exhaust piping, valve D, test table M2, valve F, second pressure room and lower end exhaust outlet, M1, the all built-in pressure of M2 and M3 and thermal module are simultaneously separately connected the first computer and the second computer, 1. gas source splits into test module after connecting a booster pump, 2. two-way is ultimately connected to matter to test module again Spectrometer.The breakthrough of gas characteristic or gas permeation property and material of rock and soil that the present invention can accurately test out material of rock and soil under this condition are to barrier/characterization of adsorption of different fluid.
Description
Technical field
The present invention relates to a kind of gas infiltration experiment device of Rock And Soil, especially a kind of material of rock and soil breakthrough of gas/
Penetration Signature double Mode Control test macro.
Background technique
In fields such as geotechnical engineering, shale gas exploitation, the buried geological storage of nuke rubbish and carbon dioxide geologic sequestrations, exist
Fluid migration problem.By taking nuclear waste disposal as an example (but being not limited only in this respect), during long-term evolution, repository can be generated
A large amount of gas, therefore, how to evaluate and test the air-tightness of padded coaming (such as bentonite) and country rock is one extremely important
The problem of.
Currently used research method is to obtain Rock And Soil sample at Practical Project scene, practical at laboratory simulation scene
Conditions and environment, then obtain relevant gas permeate/break through experimental data, to instruct engineering practice.
Here it to be introduced there are two different concepts: (1) hyperbar fracturing/breakthrough；(2) low pressure slowly permeates.
Equally or by taking the buried geological storage of nuke rubbish as an example, with the evolution of time, due to complicated physical chemistry in disposition library
Reaction gas will be generated gradually, predominantly hydrogen, the methane etc. of disposition tank corrosion generation.With the continuous generation of gas, place
Setting the air pressure in library will gradually rise, and the gas of accumulation will outwardly be escaped by padded coaming, and the air pressure gathered will
Large effect is generated to the stability and safety in entire disposition library.In bentonite water suction and gas by bentonite to moving outside
During shifting, the gas permeation property for this material of rock and soil is the important indicator for evaluating its air-tightness, is related to whole
A height puts the leakproofness and safety of Nuclear Waste Repository.
When gas generates at the beginning, air pressure is lower, at this moment belongs to the slow infiltration problem of low pressure.Gas passes through Rock And Soil material
Micron order hole inside material slowly spreads and permeates, and the gas permeability by measuring the material of rock and soil can instruct engineering
Practice.
As air pressure inside is higher and higher, at this moment hyperbar generates destruction to the pore structure inside material of rock and soil, very
To there is micro-crack extension.When reaching a certain atmospheric pressure value, material of rock and soil will form perforative airflow channel, cause the cause of rock mass
Split, the breakthrough of gas material of rock and soil, convenient in rapid escape and go out.
And different material of rock and soil is different to different gas barrier abilities, some material of rock and soil have suction to gas
Attached ability, such as coal body can adsorb a large amount of methane, this is a bit that cannot ignore.Influence of some material of rock and soil in underground water
Under, mechanical property and internal pore structure can occur to change significantly, for example be used for the buffering barrier material of nuclear waste disposal
Bentonite can absorb a large amount of underground water, and can expand after absorbing water, and improve the air-tightness of material significantly.
Example above show different material of rock and soil under different air pressures, varying environment factor, it is different and multiple
Miscellaneous gas permeation property needs to carry out experiment test according to the actual situation.
Summary of the invention
In order to overcome the above-mentioned deficiency of the prior art, the present invention provides a kind of material of rock and soil breakthrough of gas/Penetration Signature
Double Mode Control test macro can effectively simulate environment and mechanics situation under various geological conditions, accurately test out at this
Under the conditions of material of rock and soil breakthrough of gas characteristic or gas permeation property, be used to instruct engineering practice.
The technical solution used to solve the technical problems of the present invention is that: it is surveyed including gas source, booster pump, high pressure fracturing/breakthrough
Die trial block 1., low-pressure permeability test module 2. and mass spectrograph, 1. the high pressure fracturing/breakthrough test module includes being sequentially connected
Valve A, the first steel cylinder, upper gas exhaust piping, valve C, test table M1, valve E, first pressure room, test table M3 and upper end
Exhaust outlet, low pressure simulation branch include sequentially connected pressure regulator valve, valve B, the second steel cylinder, lower gas exhaust piping, valve D, survey
It takes temperature M2, valve F, second pressure room and lower end exhaust outlet, test table M1, test table M2 and test table M3 all built-in testing stream
The pressure and thermal module of body pressure and temperature change, test table M1 and test table M3 are separately connected the first computer, test table M2
The second computer is connected, gas source connects a booster pump by high-voltage tube, and the high-voltage tube after connection booster pump splits into two-way, on
1. for high pressure fracturing/breakthrough test module, 2. for low-pressure permeability test module, first pressure room and second pressure room are total on lower road on road
It is same to be connected to mass spectrograph.
Compared with prior art, a kind of material of rock and soil breakthrough of gas of the invention/Penetration Signature double Mode Control test system
System mainly possesses two test modules up and down: 1. the high pressure fracturing/breakthrough test module on upper road is used to test material of rock and soil height
Fracturing/breakthrough characteristic under air pressure, 2. the low-pressure permeability test module on lower road is used to test under material of rock and soil low pressure slowly seeps
Saturating characteristic finally can accurately test to obtain under the fracturing/breakthrough pressure and low pressure of various material of rock and soil at high pressure
Material of rock and soil effective permeability, and can judge absorption and obstructing capacity of the material of rock and soil to different fluid, be used for
Practical Project is instructed to practice.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
Fig. 2 is first pressure room/second pressure room structural schematic diagram in the embodiment of the present invention.
Fig. 3 (a) and Fig. 3 (b) is the pressure that first pressure chamber outlet end measurement table M3 is recorded in the embodiment of the present invention respectively
Situation of change, and when the pressure of arrival end reaches 10MPa, the situation of change of outlet pressures.
Fig. 4 is the Fluid pressure and temperature recorded in the embodiment of the present invention according to the measurement table M2 at second pressure chamber inlet end
Situation of change, obtained air pressure and temperature versus time curve.
Fig. 5 is gas permeability versus time curve figure of the embodiment of the present invention.
In figure, 1, valve A, the 2, first steel cylinder, 3, upper gas exhaust piping, 4, valve E, the 5, first computer, 6, valve C, 7, under
Gas exhaust piping, 8, valve F, 9, valve D, the 10, second steel cylinder, 11, valve B, 12, pressure regulator valve, 13, upper tail end venting mouth, 14,
One pressure chamber, 15, lower end exhaust outlet, 16, second pressure room, the 17, second computer, 18, pressure chamber's main body, 19, rock to be measured
Soil body material, 20, fluorubber set, 21, oil pump.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, belongs to protection scope of the present invention.
Figures 1 and 2 show that the structural schematic diagram of a preferred embodiment of the invention, one of figure material of rock and soil
Breakthrough of gas/Penetration Signature double Mode Control test macro, including gas source, booster pump, high pressure fracturing/breakthrough test module 1.,
Low-pressure permeability test module 2. and mass spectrograph, the high pressure fracturing/breakthrough test module 1. include sequentially connected valve A1,
First steel cylinder 2, upper gas exhaust piping 3, valve C6, test table M1, valve E4, first pressure room 14, test table M3 and upper end row
Port 13, it includes sequentially connected pressure regulator valve 12, valve B11, the second steel cylinder 10, lower gas exhaust piping 7, valve that low pressure, which simulates branch,
Door D9, test table M2, valve F8, second pressure room 16 and lower end exhaust outlet 15, test table M1, test table M2 and test table M3
Pressure and thermal module of built-in testing Fluid pressure and temperature change, test table M1 and test table M3 are separately connected the first electricity
Brain 5 tests the second computer of table M2 connection 17, and gas source connects a booster pump by high-voltage tube, connects the high pressure after booster pump
Pipe splits into two-way, upper road be high pressure fracturing/breakthrough test module 1., lower road be low-pressure permeability test module 2., first pressure
Room 14 and second pressure room 16 are commonly connected to mass spectrograph.The present invention can effectively control gas pressure, under high low pressure
Different test requests, easy to operate, reasonable in design, low cost.
The 14/ second pressure room 16 of first pressure room includes pressure chamber's main body 18, and material of rock and soil 19 to be measured is used
20 package of fluorubber set is sealed in pressure chamber's main body 18, and oil pump 21, Rock And Soil to be measured are connected to below pressure chamber's main body 18
The top of material 19 is connected with upper tail end venting mouth 13 or lower end exhaust outlet 15, below with upper gas exhaust piping 3 or lower exhaust
Pipeline 7 connects.
The construction forming process of the system is specific as follows:
1, it is filled first by one and meets live reality, experiment needs pure gas to be simulated or mixed gas (with swelling
For soil, it is necessary to the mixed gas such as hydrogen and methane) it is gas source, for experiment simulation gas injection gas supply；
2, and then the high-voltage tube for connecting gas source connects a booster pump, which can be by gas pressure that gas source provides
Power increases to high pressure conditions (needing actual conditions to be simulated to determine according to experiment)；
3, then the high-voltage tube of booster pump connection splits into two-way:
(1) on road be directly connected to simulation hyperbar fracturing or breakthrough high pressure fracturing or break through test module 1. in, tightly
Then it is connected to the first steel cylinder 2 (it is 35MPa that interior of steel bottle, which can bear maximum gas pressure) of a valve A1 and a 300ml, is beaten
Valve A1 among open pipe road, the air pressure balance that the air pressure and booster pump for keeping it internal increase to, 300ml interior of steel bottle reach high
Valve A1 is closed in air pressure, and hyperbar bottle at this time is spare as simulation hyperbar fracturing (breakthrough) simulation；
(2) under road be connected to the low-pressure permeability test module slowly permeated of simulation low pressure 2. in, be connected to 150ml's
Before second steel cylinder 10, by pressure regulator valve 12, the hyperbar decompression for generating booster pump complies with wanting for low-atmospheric pressure test simulation
It asks；Then the valve B11 that will be connected between hypobaric the second steel cylinder of 150ml 10 is opened, and balances its air pressure inside, is closed
Valve B11, low pressure steel cylinder at this time are spare as simulation low pressure simulation of infiltration；
4, upper and lower two test module (high pressure fracturing/breakthrough test module 1. with low-pressure permeability test module 2.) is being connected to
After respective steel cylinder (the first steel cylinder 2 and the second steel cylinder 10), all it is then coupled to an exhaust outlet and (respectively refers to exhaust pipe
Road 3 and lower gas exhaust piping 7) and a test table (be test table M1 and test table M2 respectively, the pipe by test table can be measured
The pressure and temperature of fluid in road, and then it is connected to respective computer (i.e. the first computer 5 and the second computer 17), it can be in real time by measurement
As a result it is transferred to computer and records).We are provided with valve (valve C6 and a valve between steel cylinder and test table
D9), the pressure of gas injection is simulated to control actual needs, in general, the air pressure that the air pressure of steel cylinder will be needed slightly larger than simulation.
Wherein, between steel cylinder (the first steel cylinder 2 and the second steel cylinder 10) and test table (test table M1 and test table M2) I
Be provided with valve (valve C6 and valve D9), to control the pressure of actual needs simulation gas injection, in general, steel cylinder
The air pressure that air pressure will be needed slightly larger than simulation.
In addition, test table M1 and the range of test table M2 are different, the precision for testing table M1 will be lower than test table M2, together
When test table M2 need enough precision to record the variation of the slow low-pressure permeability process air pressure of simulation.The test table of pressure
Accuracy class is to account for the percentage of pressure test table range with allowable error to indicate, range is bigger, and precision is lower.This is also
The difference of upper and lower two modules measurement table M, to cope with the case where different air pressures are simulated.
5, latter two test module is respectively coupled pressure chamber (first pressure room 14 and second to two same structures
Pressure chamber 16).Material of rock and soil 19 to be measured is put into pressure chamber first, it is closed with 20 package of fluorubber set, later using oil
Pump 21 gives pressurisation of pressure chambers, and to simulate the mechanical condition of material of rock and soil, the maximum pressure of oil pressure may be added to 60MPa, phase
When in the geology of deep part pressure condition of several kms in underground.
6,1. the high pressure fracturing/breakthrough test module for saying part first, after first pressure room 14, is connected to a survey
Scale M3 and a mass spectrograph, mass spectrograph are primarily used to detection gas ingredient, can carry out ingredient to the gas of outlet end
Analysis.Different material of rock and soil has different absorption or obstructing capacity to different gas, for example coal sample can largely adsorb first
Alkane gas, bentonite clay material can absorb a large amount of water etc..By mass spectrometric analysis, we can judge to pass through Rock And Soil material
The variation of gas componant in the mixed gas of material, and then judge under conditions of this simulation, material of rock and soil is to different gas
The ability of body barrier or absorption.
When actually using high pressure fracturing/breakthrough test module 1., firstly, the pressure of 14 arrival end of (1) first pressure room
It is stepped up (generally 1,2 ... 15MPa) by gradient, each barometric gradient continues (to be developed according to its outlet pressures for 3~7 days
Situation determines the specific time)；(2) when outlet pressures significantly increase considerably suddenly, it is believed that gas broken through or
The fracturing material of rock and soil sample.Specifically, the bentonite clay material test case that can be seen below: as Fig. 3 (a) show first
14 outlet end of pressure chamber measures the pressure changing of table M3 record, at the beginning when first pressure room 14 arrival end pressure be
1Mpa slowly permeates bentonite clay material, and the pressure of outlet end also slowly increases, and after continuing 3~7 days, still slowly increases in this way,
Think in the air pressure, it can not fracturing/break through the material of rock and soil.The pressure for improving arrival end by gradient immediately, repeats
The above process.When the pressure of arrival end reaches 10MPa, still slowly increases within several at the beginning days, but a certain moment, export suddenly
End pressure is significantly increased, such as Fig. 3 (b).At this moment, it is believed that 10MPa hyperbar fracturing simultaneously breaches the material of rock and soil.In engineering
We know that, the maximum gas pressure which is able to bear is 10Mpa or so in practice, is more than the value, easily generation gas
Body is revealed on a large scale.
7,2. the low-pressure permeability test module of lower part, after second pressure room 16, is connected only to same mass spectrograph, uses
In analysis outlet end gas componant.When doing the slow penetration testing of low pressure, the measurement table M2 of 16 arrival end of second pressure room can remember
The situation of change for recording its Fluid pressure and temperature draws air pressure and temperature versus time curve, as shown in Figure 4.
8, finally, after simulated experiment, by upper gas exhaust piping 3 and lower gas exhaust piping 7, discharge excessive gas, make be
Air pressure in road under the overall leadership reduces, and reaches level of security.Meanwhile when air pressure is excessively high in pipeline, it can also be reduced by gas exhaust piping
The air pressure level needed to us.
Whole system operating procedure and Computing Principle are as follows:
When measurement, sample is placed on inside first pressure room 14 or second pressure room 16, later always open gas source with
Valve A1 or valve B11 between first steel cylinder 2 or the second steel cylinder 10, while also opening between the first steel cylinder 2 and test table M1
Valve C6 and the second steel cylinder 10 and test table M2 valve D9, inject certain pressure into the first steel cylinder 2 or the second steel cylinder 10
Power P1 can read its value by test table M1 or test table M2, close valve C6 or valve D9 later；First pressure is opened again
The valve F8 between valve E4 or second pressure room 16 and the second steel cylinder 10 between room 14 and the first steel cylinder 2, starts to sample
Inject gas, from test table M2 can read this during pressure change, by time Δt, test table M2 degree becomes
P1- Δ P, then within the Δ t time, the average pressure in the first steel cylinder 2 or the second steel cylinder 10 is
Wherein: P1Initially to inject the pressure in steel cylinder, referred to as initial pressure；Δ P is to open valve to after sample gas injection,
The pressure value changed in the Δ t time；Δ t is the time of variation；PmeanFor average pressure；
According to Darcy's law, it is known that the average flow rate passed through within the time period is
Wherein: k is permeability, and A is the area of section of fluid, and μ is kinetic viscosity,For the local derviation to air pressure；Qmean is flat
Equal flow；
And according to The Ideal-Gas Equation, have
ΔPV0=PmeanQmeanΔt (3)
I.e.
Wherein, V0For the volume of the first steel cylinder 2 or the second steel cylinder 10.
Such as minor function is obeyed in the distribution of compressibility gas in the sample:
Wherein, h is specimen height, and t is the time, and x is the distance flowed after gas gas injection in the sample；
Carrying out derivation to (5) formula has:
When the gas permeability at measurement sample inlets end, i.e. gas enters permeability, then takes x=0, have
Wherein: P0For an atmospheric pressure, remaining symbol with formerly define it is identical；
Bringing formula (2) into has
By formula (8) and formula (4) simultaneous then available arrival end gas effective permeability
All symbols therein are identical with meaning before；
I.e. in the case where known sample height and cross-sectional area, as long as measurement obtains entrance in the arrival end Δ t time
End pressure variation delta P, so that it may the effective permeability k of sample is obtained, referring to Fig. 5.
Due to assembling between present system pipeline, whole system can be reequiped flexibly, to adapt to spy
Different test request.(repacking is mainly pressure chamber's connection type, is not related to for two kinds of testing requirements of brief description and repacking mode
The Dual module test control system of front):
(1) gas Transient Method
Test one of common method of material of rock and soil permeability.This set test macro that we develop only needs certain modification
The testing requirement of gas Transient Method can be realized, specific structure retrofit process is need to only to remove wherein any one test module
Pressure chamber, then the pressure chamber outlet end pipeline of another test module is disconnected, then by its outlet end and the survey that disassembles
The pipeline of die trial block is connected.
(2) infiltration of material of rock and soil low pressure breaks through coherent nature test with hyperbar
Sometimes, for a certain material of rock and soil, it would be desirable to know permeability when it is slowly permeated from low pressure, and
And be stepped up by gradient, the variation of this all stage permeability and the value of breakthrough pressure are broken through until its fracturing.Such
In test process, two test modules require to use, and air-tightness cannot be affected in the process, that is to say, that are surveying
During examination, the non-dismountable and interim repacking of system.It would therefore be desirable to reequip the connection type of pipeline in advance, i.e., it will test
The pressure chamber of module 2., which removes, is incorporated to the pressure chamber of test module 1., the valve before two-way pressure chamber and be one.Carry out
When gas injection is tested, 1. tested using test module first.After the completion of low pressure test phase, adjust test module 2. in
Air pressure so that its air pressure and test module 2. in air pressure it is identical, then, close test module 1. in valve.In this way, two
A module just 2. tested together, continuing to use Hi-pot test module later by seamless connection.
Above-described two kinds of test requests are the very common test method of geotechnical engineering testing field, in general,
Every kind of testing requirement needs a certain specific test macro.And this set system that we research and develop, it can be changed by simple pipeline
Dress, that is, can reach above two testing requirement, embody this set system of our research and development powerful novelty and adaptability.It can save
About a large amount of manpower, material resources and financial resources can reach the identical test function of several test macros.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, it is all according to
According to technical spirit of the invention, any simple modification and same variation are made to above embodiments, each fall within guarantor of the invention
Within the scope of shield.
Claims (4)
1. a kind of material of rock and soil breakthrough of gas/Penetration Signature double Mode Control test macro, it is characterized in that: including gas source, increasing
Press pump, high pressure fracturing/breakthrough test module 1., low-pressure permeability test module 2. with mass spectrograph, the high pressure fracturing/breakthrough surveys
1. die trial block includes sequentially connected valve A (1), the first steel cylinder (2), upper gas exhaust piping (3), valve C (6), test table M1, valve
Door E (4), first pressure room (14), test table M3 and upper tail end venting mouth (13), it includes sequentially connected that low pressure, which simulates branch,
Pressure regulator valve (12), valve B (11), the second steel cylinder (10), lower gas exhaust piping (7), valve D (9), test table M2, valve F (8), the
Two pressure chamber (16) and lower end exhaust outlet (15), test table M1, test table M2 and test table M3 all built-in testing Fluid pressures
And the pressure and thermal module of temperature change, test table M1 and test table M3 are separately connected the first computer (5), test table M2 connection
Second computer (17), gas source connect a booster pump by high-voltage tube, and the high-voltage tube after connection booster pump splits into two-way, on
Road be high pressure fracturing/breakthrough test module 1., lower road be low-pressure permeability test module 2., first pressure room (14) and second pressure
Room (16) is commonly connected to mass spectrograph.
2. a kind of material of rock and soil breakthrough of gas/Penetration Signature double Mode Control test macro according to claim 1, special
Sign is: the survey pressure precision of the test table M1 and test table M3 is both less than the survey pressure precision for testing table M2.
3. a kind of material of rock and soil breakthrough of gas/Penetration Signature double Mode Control test macro according to claim 1 or claim 2,
It is characterized in that: the volume of first steel cylinder (2) be 300ml, pressure 35MPa, the volume 150ml of the second steel cylinder (10),
Pressure 35MPa.
4. a kind of material of rock and soil breakthrough of gas/Penetration Signature double Mode Control test macro according to claim 1, special
Sign is: the first pressure room (14)/second pressure room (16) include pressure chamber's main body (18), material of rock and soil to be measured
(19) it is sealed in pressure chamber's main body (18) with fluorubber set (20) package, oil pump is connected to below pressure chamber's main body (18)
(21), the top of material of rock and soil (19) to be measured is connected with upper tail end venting mouth (13) or lower end exhaust outlet (15), under
It is square to be connect with upper gas exhaust piping (3) or lower gas exhaust piping (7).
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