CN102607950A - Rock shearing seepage coupling true triaxial test system - Google Patents

Rock shearing seepage coupling true triaxial test system Download PDF

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Publication number
CN102607950A
CN102607950A CN2012100554624A CN201210055462A CN102607950A CN 102607950 A CN102607950 A CN 102607950A CN 2012100554624 A CN2012100554624 A CN 2012100554624A CN 201210055462 A CN201210055462 A CN 201210055462A CN 102607950 A CN102607950 A CN 102607950A
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plate
charger
assembly
pressure
test
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CN2012100554624A
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CN102607950B (en
Inventor
郭惟嘉
尹立明
陈绍杰
孙文斌
张新国
王胜清
刘彦民
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山东科技大学
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Abstract

The invention relates to a rock shearing seepage coupling true triaxial test system, which comprises a loading assembly, a test box, a seepage assembly, a detection assembly and a control assembly. The whole system is high in rigid, safe and reliable in high-pressure water injection and sealability, good in sealing reliability, high in loading stability and protection strength and capable of effectively reducing the end-part friction effect and the corner effect and realizing the uniform triaxial stress state as far as possible; a loading test device and a mainshaft loading mechanism are designed in a split manner, and safe high-pressure water injection is achieved; a safety valve and a pressure-stabilizing control device are arranged on a water outlet; and the rock shearing seepage coupling true triaxial test system is stable to control.

Description

A kind of rock is sheared seepage flow coupling true triaxial test system

Technical field

The present invention relates to a kind of rock stress measurement pilot system, relate in particular to a kind of rock and shear seepage flow coupling true triaxial test system.

Background technology

Because engineering rock mass generally receives the triaxiality effect, thereby rock cranny stress seepage flow coupled characteristic more can reflect the actual conditions of natural geology rock mass under the laboratory study triaxiality condition.But seal means is particularly permeated in the restriction of the condition that is put to the test, and the test box of existing device is allowing under the suitable shear displacemant condition, and the seepage pressure that can bear is often lower.Under high hydraulic pressure, high triaxial pressure coupling, the systematic study of the quantitative description that the real-time follow-up of rock cranny damage expansion physical process and deep rock mass crack distribute is also more rarely seen.Therefore; For satisfying experimental study requirement to the coupled problem of deep engineering crack rock seepage field and stress field; To the problem that exists in the present correlation test equipment; Singularity according to deep rock mass environment of living in; Be badly in need of a kind of high hydraulic pressure rock stress-seepage flow coupling true triaxial test system,, disclose breaking joint network generation and experiment condition is provided the mechanism that influences of deep stope rock mass structure stability degradation and seepage flow catastrophe for the mechanical property and the stress characteristic of research crack rock develops to the crack and the influence of penetration property.

In the prior art; CN2600810Y discloses a kind of true three seepage tests measurement mechanisms, but it only is a kind of description of principle, and does not disclose concrete charger structure, test box structure, seepage flow loading system structure; And it uses the method for optical fiber measurement to measure rock seepage flow state; This just means and must in test box, reserve the optical fiber import that the test box sealing is poor, the accurate seepage flow control that can't do.CN100573095C discloses a kind of true triaxil tester, and it mainly is the measurement that is used for the soil sample strain, need not to consider seepage flow situation box crack device, so it does not have osmotic system, does not also have similarly to measure like sound wave measuring system etc. the device in sample crack.CN102096107A discloses the method in a kind of acoustic measurement ground crack; But it mainly is the measurement to the rock of macrostructure; Rather than to the measurement of little sample, and it mainly is the description to data processing method, does not introduce concrete measurement component.

Summary of the invention

For addressing the above problem; The present invention proposes a kind of rock and shears seepage flow coupling true triaxial test system; Pilot system integral body is formed entire system structure compactness attractive in appearance, multiple functional, easy to operate by three loading frames, three load maintainers, water under high pressure osmotic system, test box, digital control system and data acquisition system (DAS)s etc.Load testing machine has constant triaxial stress, constant three-shaft displacement and three types of controlled conditions of constant three rigidity.On the shear direction of the parallel crack of test specimen, apply seepage water pressure.Test box is an open by design; Change corresponding pressure head and assembly, under above-mentioned border and loading condition, can carry out the crack of samples such as rock, cement, ground class and shear permeability test, closing of fracture stress-infiltration coupling test; Crack shear stress-infiltration coupling test; The hydraulic pressure crack propagation simulation test of floor strata textural association, fragmented rock body water under high pressure seepage tests, the crack rock water under high pressure causes and splits test; The perviousness of crack rock and dynamic characteristic test etc. under the shearing seepage flow rheological test of base plate rock mass, three off-load conditions.Pilot system has following characteristic and innovation: can realize independent servo-controlled true three loadings; Open test box design can be carried out above-mentioned correlation test to the large scale test specimen; Maximum sealing water pressure (seepage pressure) can reach 5Mpa; Can realize the tracking of rock cranny damage expansion physical process and the quantitative description that the crack distributes.

Concrete technical scheme of the present invention is: a kind of rock is sheared seepage flow coupling true triaxial test system, comprises charging assembly, test box, seepage flow assembly, detection components and Control Component;

Said charging assembly comprises frame, axial charger, side direction charger, lateral shear charger; Said test box is arranged in the frame and is connected with axial charger, side direction charger and lateral shear charger respectively; Axially charger, side direction charger, lateral shear charger can apply acting force to test box respectively, above-mentioned three charger acting forces apply the direction pairwise orthogonal;

Said test box comprises box body, and said box body is processed by steel plate, comprises header board, back plate, left plate, right plate, upper plate and lower plate; Wherein be welded to connect between back plate, right plate and the upper plate, said header board coupling shaft is to charger, and said left plate connects the side direction charger; Said lower plate connects the lateral shear charger; By sealant, said upper plate is provided with apopore with respect to the medial surface setting of box body for said header board, left plate and lower plate, and said lower plate is provided with the inlet opening;

Said seepage flow module permeate pressue device, measurement mechanism and controller; Said permeate pressurization device comprises servomotor and pumping unit; Said pumping unit connects said inlet opening; Hydraulic pressure is provided for the sample in the test box through the driving of servomotor, said measurement mechanism comprises pressure transducer, flow sensor, and said pressure transducer and flow sensor are measured the pressure and the flow of said apopore and inlet opening; The difference that said controller draws inlet opening pressure and apopore pressure according to the pressure and the flow of apopore and inlet opening drives according to said difference and to measure said servomotor and regulate inlet opening intake pressure and flow of inlet water;

Said detection components is the sonic detection assembly, comprises a plurality of probes, sonic detection analyser and acoustic wave transducer, and said probe is arranged on the inside of test box, and each probe connects said sonic detection analyser through said acoustic wave transducer respectively;

Said Control Component comprises computing machine; Said computing machine joint detection assembly, seepage flow assembly and charging assembly are used for the action of control detection assembly, seepage flow assembly and charging assembly and the said sonic detection analyser of reception and record detection components and detect the sample data that obtains.

The rigidity of package unit of the present invention is high, and high pressure water injection and sealingly secure are reliable, can effectively reduce end friction effect and corner effect, realize uniform triaxial stress state as far as possible;

Sealing reliability is good, the test specimen of boxlike test unit precompressed perfusion sealing, and the gap that six pressing plates of test specimen and boxlike test unit constitute is enough little, and sealing is reliable;

It is high with protection intensity to load stability; Load testing machine and main shaft load maintainer are split designs, the loading position of test specimen accurately and reliably, test unit and top stationary installation reliably link; When the sample momentary breakdown, system stops to load by the defence program of setting automatically;

High pressure water injection safety, water delivering orifice dress safety valve and voltage stabilizing control device, when the water delivering orifice sudden changes in pressure, what control device began controlled pressure, flow and water pump operates in the safe range water filling;

Control system is stable; Closing control software or computing machine occur crashing and need restart in the process of the test; Test still can be by origin operation order operation, and only lost Control Software do not open during data, still can preserve use as prominent after meeting the machine energising to be calculated of the existing test data of outage.

Description of drawings

Accompanying drawing 1 is the structural principle sketch of true triaxial test according to the invention system;

Accompanying drawing 2 is the front elevation (only showing charging assembly) of true triaxial test system described in the accompanying drawing 1;

Accompanying drawing 3 is the side view (only showing charging assembly) of true triaxial test system described in the accompanying drawing 1.

Reference numeral is following:

The 1-test box; The 2-charging assembly; 3-seepage flow assembly; 4-detection components (sonic detection assembly); The 5-Control Component; The 6-frame; The axial charger of 7-; 8-side direction charger; 9-lateral shear charger.

Embodiment

Referring to accompanying drawing, a kind of rock is sheared seepage flow coupling true triaxial test system, comprises charging assembly, test box, seepage flow assembly, detection components and Control Component;

Charging assembly comprises frame, axial charger, side direction charger, lateral shear charger; Test box is arranged in the frame and is connected with axial charger, side direction charger and lateral shear charger respectively; Axially charger, side direction charger, lateral shear charger can apply acting force to test box respectively, above-mentioned three charger acting forces apply the direction pairwise orthogonal; Charger respectively has independently load cylinder, force transducer, pressure head etc.Frame adopts the framed structure form, and two side direction load cylinders laterally are vertically fixed on the pressure-bearing post, and force transducer is installed on the piston.Axially load maintainer comprises load cylinder, force transducer, displacement transducer etc.Control system adopts U.S. DSI company full Digitized Servo Control device; This controller has a plurality of measurement passages; Each measures passage can carry out the independent control of load, displacement, distortion etc. or jointly controlling of several measurement passages respectively, and can realize not having the conversion of impact between multiple control modes.

Test box comprises box body, and box body is processed by steel plate, comprises header board, back plate, left plate, right plate, upper plate and lower plate; Wherein be welded to connect between back plate, right plate and the upper plate, the header board coupling shaft is to charger, and left plate connects the side direction charger; Lower plate connects the lateral shear charger; By sealant, and header board, left plate and lower plate can move relative to box body with respect to the medial surface setting of box body for header board, left plate and lower plate, and upper plate is provided with apopore; Lower plate is provided with the inlet opening, supplies the usefulness of seepage flow pressurization; Test box has also comprised accessory structures such as cushion block, loading pad, and integral body is fastened on the framework through bolt, can realize test box dismounting, conversion easily.Sealant adopts resin material; Its existing certain intensity, can bear certain deformation again; And friction force is smaller, and the isolated high-voltage infiltration water applies independent side load in test specimen left side and front side through loading unit well; The bottom applies vertical load and infiltration hydraulic pressure, and test specimen is implemented in through sealant and still keeps compression seal under the sliding mode.Through the difference of the preset different materials cushion block compressive deformation amount in top, realize the two-part shear displacemant in the left and right sides, sillar crack, the shear box inside dimension is 400mm (water infiltration direction) * 200mm (infiltration width) * 200mm (side direction).

The seepage flow assembly comprises permeate pressurization device, measurement mechanism and controller; The permeate pressurization device comprises servomotor and pumping unit; Pumping unit connects said inlet opening; Hydraulic pressure is provided for the sample in the test box through the driving of servomotor, measurement mechanism comprises pressure transducer, flow sensor, and pressure transducer and flow sensor are measured the pressure and the flow of said apopore and inlet opening; The difference that controller draws inlet opening pressure and apopore pressure according to the pressure and the flow of apopore and inlet opening, and drive servomotor according to said difference and regulate inlet opening intake pressure and flow of inlet water; This system can realize multistage controlled permanent seepage pressure and seepage discharge control.Controller is the EDC controller; A pressure reduction control channel can be set in controller control system software; Measure the difference of intake pressure and top hole pressure, realize the closed-loop control of test box import and export osmotic pressure difference, and can realize stable state and the control of transient state seepage pressure.

Meticulous detection for test block crack sillar destructive process under triaxial pressure and water under high pressure effect is relation experiment key of success place.All the time, people study the rock mechanics characteristic through the research stress-strain relation, and are not enough to destructive process research.Rock mass is a geologic body, and it is intricate that its crack distributes, because test box seal, adds the effective means that lacks the expansion of observation internal crack, so research becomes the difficult problem in ROCK MECHANICS RESEARCH field for rock failure mechanism of rock evolutionary process.In order to obtain crack propagation evolutionary process more clearly, test intended adopts the mode of real-time acoustic emission location technology to survey rock fracture expansion evolutionary process.Its detection components is the sonic detection assembly; Comprise a plurality of probes, sonic detection analyser and acoustic wave transducer; Probe is arranged on the inside of test box; Each probe connects the sonic detection analyser through acoustic wave transducer respectively, detects the seepage flow situation and the crack state of sample in the test box through detection components;

Control Component comprises computing machine; Computing machine joint detection assembly, seepage flow assembly and charging assembly; Be used for the action of control detection assembly, seepage flow assembly and charging assembly; Like the on-load pressure of certain charger in the charging assembly, seepage flow assembly whether to the test box pressurization etc., and receive and the record detection components in said sonic detection analyser detect the sample data that obtains, through screen display data and image intuitively; And can structure be printed through printer, supply the usefulness of researching and analysing.

The above; Be merely the preferable embodiment of patent of the present invention; But the protection domain of patent of the present invention is not limited thereto; Any technician who is familiar with the present technique field is in the technical scope that patent of the present invention discloses, and the variation that can expect easily or replacement all should be encompassed within the protection domain of patent of the present invention.

Claims (1)

1. a rock is sheared seepage flow coupling true triaxial test system, it is characterized in that: comprise charging assembly, test box, seepage flow assembly, detection components and Control Component;
Said charging assembly comprises frame, axial charger, side direction charger, lateral shear charger; Said test box is arranged in the frame and is connected with axial charger, side direction charger and lateral shear charger respectively; Axially charger, side direction charger, lateral shear charger can apply acting force to test box respectively, above-mentioned three charger acting forces apply the direction pairwise orthogonal;
Said test box comprises box body, and said box body is processed by steel plate, comprises header board, back plate, left plate, right plate, upper plate and lower plate; Wherein be welded to connect between back plate, right plate and the upper plate, said header board coupling shaft is to charger, and said left plate connects the side direction charger; Said lower plate connects the lateral shear charger; Said header board, left plate and lower plate are provided with sealant with respect to the medial surface of box body, and said upper plate is provided with apopore, and said lower plate is provided with the inlet opening;
Said seepage flow assembly comprises permeate pressurization device, measurement mechanism and controller; Said permeate pressurization device comprises servomotor and pumping unit; Said pumping unit connects said inlet opening; Hydraulic pressure is provided for the sample in the test box through the driving of servomotor, said measurement mechanism comprises pressure transducer, flow sensor, and said pressure transducer and flow sensor are measured the pressure and the flow of said apopore and inlet opening; The difference that said controller draws inlet opening pressure and apopore pressure according to the pressure and the flow of apopore and inlet opening, and drive said servomotor according to said difference and regulate inlet opening intake pressure and flow of inlet water;
Said detection components is the sonic detection assembly, comprises a plurality of probes, sonic detection analyser and acoustic wave transducer, and said probe is arranged on the inside of test box, and each probe connects said sonic detection analyser through said acoustic wave transducer respectively;
Said Control Component comprises computing machine; Said computing machine joint detection assembly, seepage flow assembly and charging assembly are used for the action of control detection assembly, seepage flow assembly and charging assembly and the said sonic detection analyser of reception and record detection components and detect the sample data that obtains.
CN 201210055462 2012-03-05 2012-03-05 Rock shearing seepage coupling true triaxial test system CN102607950B (en)

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103063518A (en) * 2012-12-31 2013-04-24 河海大学 Experimental system for coupling of seepage and stress in rock tensile state
CN103743633A (en) * 2014-01-24 2014-04-23 重庆大学 Fluid structure interaction coal rock shear-seepage test device
CN103837468A (en) * 2014-02-27 2014-06-04 东北大学 Test method for detecting friction efficiency of end part and performances of antifriction material
CN103994956A (en) * 2013-02-20 2014-08-20 核工业北京地质研究院 Test device for determining permeability of large-scale single fracture medium under triaxial stress
CN103994957A (en) * 2013-02-20 2014-08-20 核工业北京地质研究院 Test device for determining permeability of large-scale single fracture medium under normal stress
CN104614497A (en) * 2015-03-09 2015-05-13 中国矿业大学 True-triaxial integrated experimental system for fracturing due to flowing pressure, slotting, seepage and gas driving
CN104677815A (en) * 2015-03-06 2015-06-03 西南石油大学 True triaxial rock parameter test system
CN104833582A (en) * 2015-05-21 2015-08-12 大连理工大学 Natural gas hydrate sediment triaxial test device
CN105203411A (en) * 2015-11-06 2015-12-30 武汉大学 Slit shear-seepage coupling test system of triaxial cell and test method
CN105699211A (en) * 2016-01-28 2016-06-22 河海大学 Testing method of rock seepage-stress coupling shearing rheological test
CN105842424A (en) * 2016-05-20 2016-08-10 山东科技大学 Three-dimensional stress fluid coupling grouting test system and method
CN105929136A (en) * 2016-05-04 2016-09-07 重庆大学 Hydraulic fracturing simulation test method achieved in shear stress state
CN106872330A (en) * 2017-01-16 2017-06-20 中国科学院武汉岩土力学研究所 True triaxial test method and system
CN108318528A (en) * 2018-01-09 2018-07-24 中国石油天然气股份有限公司 The determination method and apparatus of the running parameter of electric pulse pressure break
CN108732010A (en) * 2017-04-24 2018-11-02 中国石油天然气股份有限公司 A kind of simulation of fracturing fracture and evaluating apparatus and method
CN110415167A (en) * 2019-08-02 2019-11-05 山东科技大学 A kind of rough surface crack generation method and pilot system based on Digital image technology
CN110749497A (en) * 2019-12-06 2020-02-04 大连理工大学 Rock creep triaxial test system and method for continuous water environment effect

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CN101561378A (en) * 2009-05-22 2009-10-21 清华大学 Tester for testing seepage and scour characteristics of contact surface of soil body and structure
CN102253183A (en) * 2011-06-28 2011-11-23 山东科技大学 Shear-seepage coupling test system for rock cracks under action of confining pressure
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CN101398355A (en) * 2008-10-31 2009-04-01 清华大学 Three-axis infiltration experiment device
CN101561378A (en) * 2009-05-22 2009-10-21 清华大学 Tester for testing seepage and scour characteristics of contact surface of soil body and structure
CN102253183A (en) * 2011-06-28 2011-11-23 山东科技大学 Shear-seepage coupling test system for rock cracks under action of confining pressure
CN202522479U (en) * 2012-03-05 2012-11-07 山东科技大学 Novel rock shearing seepage coupling true triaxial test system

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103063518A (en) * 2012-12-31 2013-04-24 河海大学 Experimental system for coupling of seepage and stress in rock tensile state
CN103994956A (en) * 2013-02-20 2014-08-20 核工业北京地质研究院 Test device for determining permeability of large-scale single fracture medium under triaxial stress
CN103994957A (en) * 2013-02-20 2014-08-20 核工业北京地质研究院 Test device for determining permeability of large-scale single fracture medium under normal stress
CN103743633A (en) * 2014-01-24 2014-04-23 重庆大学 Fluid structure interaction coal rock shear-seepage test device
CN103743633B (en) * 2014-01-24 2016-01-06 重庆大学 Fluid structure interaction coal rock shear-seepage test device
CN103837468A (en) * 2014-02-27 2014-06-04 东北大学 Test method for detecting friction efficiency of end part and performances of antifriction material
CN103837468B (en) * 2014-02-27 2016-04-20 东北大学 A kind of test method detecting end friction effect and antifriction material performance
CN104677815A (en) * 2015-03-06 2015-06-03 西南石油大学 True triaxial rock parameter test system
US9921202B2 (en) 2015-03-09 2018-03-20 China University Of Mining And Technology Integrated experimental system of hydrofracturing, water jet slotting, seepage and gas displacement under true triaxial stress
CN104614497A (en) * 2015-03-09 2015-05-13 中国矿业大学 True-triaxial integrated experimental system for fracturing due to flowing pressure, slotting, seepage and gas driving
CN104833582A (en) * 2015-05-21 2015-08-12 大连理工大学 Natural gas hydrate sediment triaxial test device
CN105203411A (en) * 2015-11-06 2015-12-30 武汉大学 Slit shear-seepage coupling test system of triaxial cell and test method
CN105699211A (en) * 2016-01-28 2016-06-22 河海大学 Testing method of rock seepage-stress coupling shearing rheological test
CN105929136A (en) * 2016-05-04 2016-09-07 重庆大学 Hydraulic fracturing simulation test method achieved in shear stress state
CN105929136B (en) * 2016-05-04 2018-07-03 重庆大学 Hydraulic fracturing simulation experiment method under shear stress state
CN105842424A (en) * 2016-05-20 2016-08-10 山东科技大学 Three-dimensional stress fluid coupling grouting test system and method
CN106872330A (en) * 2017-01-16 2017-06-20 中国科学院武汉岩土力学研究所 True triaxial test method and system
CN108732010A (en) * 2017-04-24 2018-11-02 中国石油天然气股份有限公司 A kind of simulation of fracturing fracture and evaluating apparatus and method
CN108318528A (en) * 2018-01-09 2018-07-24 中国石油天然气股份有限公司 The determination method and apparatus of the running parameter of electric pulse pressure break
CN110415167A (en) * 2019-08-02 2019-11-05 山东科技大学 A kind of rough surface crack generation method and pilot system based on Digital image technology
CN110415167B (en) * 2019-08-02 2020-03-06 山东科技大学 Rough surface crack generation method and test system based on digital image technology
CN110749497A (en) * 2019-12-06 2020-02-04 大连理工大学 Rock creep triaxial test system and method for continuous water environment effect

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