CN101059495B - rock joint shearing-seepage coupling test system - Google Patents
rock joint shearing-seepage coupling test system Download PDFInfo
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- CN101059495B CN101059495B CN2007100404575A CN200710040457A CN101059495B CN 101059495 B CN101059495 B CN 101059495B CN 2007100404575 A CN2007100404575 A CN 2007100404575A CN 200710040457 A CN200710040457 A CN 200710040457A CN 101059495 B CN101059495 B CN 101059495B
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Abstract
A rock shearing-influent couple test system comprises a shearing box, a test force loading and displacement testing device, an open measurer and a computer, wherein the shearing box comprises a water inlet channel and a water outlet channel. The invention is characterized in also composed of an influent detector comprising a water inlet device and a water outlet flux measurer, the water inlet device is communicated with the water inlet of the water inlet channel, the water outlet flux measurer is communicated with the water outlet of the water outlet channel. When processes rock shearing-influent couple test, the invention can freely change the volume and change method of tangent force, normal force and water pressure, as well as obtain the open change, tangent displacement and flux, while the data can real represent the force state, without multiple devices, to reduce cost, save time, save following data treatment time, and improve working efficiency.
Description
Technical field
The present invention relates to a kind of pilot system of carrying out the rock joint shear-seepage coupling test.
Background technology
The rock mass of occurring in nature is subjected to external force and does the time spent, can produce structural planes such as joint and crack, when certain regional intact rock is subjected to the external force effect and breaks, can form a pair of joint plane.Carry out the shear-seepage coupling test of rock joint both at home and abroad, have the problem of two aspects more: the too small and radial water flow mode of infiltration hydraulic pressure value.The infiltration hydraulic pressure value is too small, and head height has only 2m many, and under the low osmotic pressure, the sealing of shear box is easier to realize, and the maximum head height in the actual engineering even surpass 1000m is difficult to shear box is done sealing; And the seepage flow mode of radiant flux, promptly mobile to all around from joint plane centre-drilling hole water filling, this seepage flow mode, as long as can satisfy continuous water flow mode, can not do sealing to shear box, but this does not conform to actual conditions yet, and the type of flow of nature water in the joint should be uniplanar flow, and promptly the end from joint plane flows to the other end.
Because the existence of an aforementioned difficult problem, can carry out the testing machine slower development of the shear-seepage coupling test of rock joint, at present, carry out the shearing seepage flow coupling test of rock joint both at home and abroad, be that rock joint is packed in the sealing shear box of unique design mostly, and be installed on the direct shear test machine, on rock, apply different tangential forces and normal force respectively by direct shear test machine, by the aperture variation and the tangential displacement of displacement sensor rock joint.Measure the flow of water seepage flow in rock joint, must use other special purpose test equipment to carry out.Can't form the rock joint shearing-seepage coupling test system of incorporate convergence test force loading device, hydraulic pressure load traffic measurement mechanism, sealing shear box and opening width measurement mechanism, thereby be implemented in the rock joint shear test under stable state hydraulic pressure or the transient state hydraulic pressure seepage flow state, and accurate measurement is made in vertical force and horizontal force, opening width and horizontal shift and flow simultaneously.
Therefore, how to solve that many shortcomings that prior art exists are real to have become the technical task that those skilled in the art need to be resolved hurrily.
Summary of the invention
The object of the present invention is to provide a kind of rock joint shearing-seepage coupling test system, can carry out the rock joint shear-seepage coupling test, the changing value that can obtain joint opening width, horizontal shift, flow simultaneously that is loading.
For achieving the above object, the invention provides a kind of rock joint shearing-seepage coupling test system, comprise that a shear box, a test power load and displacement measuring device, an one opening width measurement mechanism and a computing machine, described shear box has an intake tunnel and an exhalant canal, it is characterized in that, also comprise a seepage detector, this seepage detector comprises a water feed apparatus and a water flow measurement mechanism, the water inlet of the intake tunnel of this water feed apparatus UNICOM shear box, the water delivering orifice of the exhalant canal of water flow measurement mechanism UNICOM shear box.
Wherein, described water flow measurement mechanism comprises a header tank, one second flowmeter; Second flowmeter is connected between the water delivering orifice and header tank of shear box, and second flowmeter links to each other with computing machine.
Wherein, described water flow measurement mechanism also comprises a back-pressure charger, one second hydraulic pressure transducer and a controller, second hydraulic pressure transducer is installed on the rising pipe, be electrically connected with controller, controller is electrically connected with the back-pressure charger, the discharge pressure of control rising pipe, the pressure differential of assurance water inlet pipe and rising pipe; The back-pressure charger is installed between second flowmeter and second hydraulic pressure transducer, and controller is controlled by computer servo.
Wherein, described water flow measurement mechanism also comprises a pressure inductor, and pressure inductor is installed between second flowmeter and the header tank, links to each other with computing machine.
Preferably, described water feed apparatus comprises a reserve tank, a hydraulic pressure charger, one first hydraulic pressure transducer; First hydraulic pressure transducer is installed on the water inlet pipe, is electrically connected with controller, and the hydraulic pressure charger is installed between first hydraulic pressure transducer and the reserve tank, and controller is controlled by computer servo.
More preferably be, described water feed apparatus also comprises a first flow meter, and the first flow meter is installed between reserve tank and the hydraulic pressure charger, and the first flow meter links to each other with computing machine.
More preferably be, the header tank of described water flow measurement mechanism is an airtight container, and this closed container has an outlet that switch control is arranged, and leads to the reserve tank of water feed apparatus.
Use the present invention, can on the basis of rock joint shear, carry out the shear-seepage coupling test, in process of the test, can change vertical force, horizontal force, hydraulic pressure value arbitrarily, and can obtain opening width, shear displacemant and fluctuations in discharge value simultaneously; In the process of the test, current can the simulating nature flow state, and therefore, the test findings of acquisition more can be used to instruct actual engineering authentic and validly.Simultaneously, use native system, once obtain desired data, need not many complete equipments, reduced experimentation cost, saved the processing time of test period and late time data, improved work efficiency, operate more humane.
Description of drawings
Fig. 1 is the block diagram of rock joint shearing-seepage coupling test system of the present invention
Fig. 2 a is the longitudinal section of the shear box among the present invention;
Fig. 2 b is the cut-open view of Fig. 2 a along the B-B line;
Fig. 2 c is the cut-open view of Fig. 2 a along the A-A line;
Fig. 3 is the fundamental diagram of the seepage detector among the present invention;
Fig. 4 is to be that test power among the present invention loads and the fundamental diagram of displacement measuring device;
Fig. 5 is the extensometer scheme of installation among the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments rock joint shearing-seepage coupling test system of the present invention is further described.
As shown in Figure 1, rock joint shear-seepage coupling test assembling system of the present invention comprises a shear box, and a test power loads and displacement measuring device, an opening width measurement mechanism, a seepage detector and a computing machine.
Shear box
Shown in Fig. 2 a～2c, shear box 1 is by playing box 3, last box 4, water inlet pipe 5, rising pipe 6 to form, and the wallboard that constitutes shear box 1 is made by steel plate.
Following box 3 is made up of with lower wall panels 37 front panel 31, squab panel 32, left wallboard 33,34, right wallboard 35,36: front panel 31 is two block plates big or small, that thickness is all identical, symmetric arrangement with squab panel 32; Left side wallboard 33,34 and right wallboard 35,36 be symmetry respectively, and left wallboard 33 is the steel plate that size is identical, thickness is different with right wallboard 35, left wallboard 34 and right wallboard 36, is formed by connecting by bolt;
The front panel 41 of last box is identical with front panel 31 thickness of following box, the squab panel 42 of last box is identical with squab panel 32 thickness of following box, the left wallboard 43,44 of last box is identical with left wallboard 33,34 thickness of following box, the right wallboard 45,46 of last box is identical with right wallboard 35,36 thickness of following box, and the wainscot 47 of last box is all identical with lower wall panels 37 sizes, the thickness of following box.
In that antifriction plate 51 is installed between front panel 31 and front panel 41 surface of contact, between squab panel 32 and squab panel 42 surface of contact, in the groove that left wallboard 33, left wallboard 43, right wallboard 35 and right wallboard 45 are reserved, be pressed into water proof O-ring seal 52.
Before the test, seal with encapsulant 53 and to cut seam, only reserve the passage of water inlet and water delivering orifice, and at test specimen outer wrap water-resisting layer 54.
Seepage detector
Seepage detector is mainly used in the flow that control hydraulic pressure loaded and measured water, is a cover closed-loop control system.
As shown in Figure 3, seepage detector comprises a water feed apparatus, a water flow measurement mechanism.Water feed apparatus comprises a reserve tank, a first flow meter, a hydraulic pressure charger, one first hydraulic pressure transducer and a controller.First hydraulic pressure transducer is installed on the inlet pipeline of shear box, is electrically connected with controller, and controller is controlled by computer servo.The first flow meter is installed between hydraulic pressure charger and the reserve tank.The water flow measurement mechanism comprises a header tank, a pressure inductor, one second flowmeter, a back-pressure charger, one second hydraulic pressure transducer and a controller.Second hydraulic pressure transducer is installed on the outlet pipeline of shear box 1, be electrically connected with controller, the back-pressure charger is installed between second hydraulic pressure transducer and second flowmeter, and controller is electrically connected with the back-pressure charger, and pressure inductor is installed between second flowmeter and the header tank.Header tank is an airtight container, and this header tank has an outlet, leads to reserve tank, in test, and port closing.Less when flow, when second flowmeter can't be discerned flow, can obtain the data on flows at water delivering orifice place by pressure inductor; The first flow meter of measurement of discharge, second flowmeter, pressure transducer link to each other with computing machine, gather in real time, can obtain data at any time.
During test, at first by the computing machine output order to controller, controller is exported the pressure driver of one road signal to the hydraulic pressure charger respectively, export the back-pressure driver of one road signal to the back-pressure charger, the pressure driver promotes the hydraulic pressure loader of hydraulic pressure charger, water in the reserve tank flows into the shear box water inlet under certain pressure effect, flow out from water delivering orifice by Rock Joint Plane, through the back-pressure charger, flow to header tank, simultaneously, the back-pressure driver of back-pressure charger, promote the back-pressure loader, produce certain back-pressure, make the pressure reduction of water inlet and water delivering orifice keep certain numerical value; According to testing requirements, can realize respectively that steady state method and transient state method load; In the time need not using the back-pressure charger, back-pressure numerical value can be made as 0 with its shielding; First hydraulic pressure transducer is installed between hydraulic pressure charger and shear box water inlet, between shear box water delivering orifice and back-pressure loader, second hydraulic pressure transducer is installed also, the hydraulic pressure and the back-pressure that are used for the loading of experiment with measuring process, and be connected with controller, controller is connected with computing machine, obtains data at any time, in time adjusts, control hydraulic pressure is realized closed-loop control; The header tank at water delivering orifice place is a closed container, and this header tank has an outlet that switch control is arranged, and leads to reserve tank, can be according to test situation and testing requirements control.
Can by flow of inlet water and water flow to checking recently whether this device has seepage.
Test power loads and the displacement measurement measurement mechanism
Test power loads and displacement measuring device is a prior art, as shown in Figure 4, comprises that a normal direction test power loading and displacement measuring device and a tangential test power load and displacement measuring device.
Normal direction test power loads and displacement measuring device comprises normal direction controller, normal direction oil cylinder, normal direction loading head, normal direction load sensor, two normal direction deformation-sensors and normal direction displacement transducer.Computing machine issues instructions to the normal direction controller, and normal direction controller control the mobile of oil cylinder loads and unload, and load acts on the shear box by loading head; In load or unload, measure the data that normal direction is out of shape and is loaded attached to normal direction deformation-sensor on the loading head and normal direction load sensor, data are fed back to the normal direction controller, with the numerical value of check and check loading; In load or unload, the normal direction displacement transducer is fixed on the shear box, mensuration is to displacement; The data that record in the process of the test are transferred to computing machine by controller.
Tangential test power and displacement measuring device comprise tangential controller, tangential oil cylinder, tangential loading head, circumferential load sensor, two tangential deformation sensors and tangential displacement sensor.Computing machine issues instructions to tangential controller, and tangential controller control the mobile of oil cylinder loads and unload, and load acts on the shear box by loading head; In load or unload, measure the data of tangential deformation and load attached to the tangential deformation sensor on the loading head and circumferential load sensor, data are fed back to tangential controller, with check with check the falsehood that loads; In load or unload, the tangential displacement sensor is fixed on the shear box, measure tangential displacement; The data that record in the process of the test are transferred to computing machine by controller.
Described test power loads and displacement measuring device, is controlled by computer servo; The displacement that described horizontal shift measurement mechanism is measured is by computer-automatic collection.
The opening width measurement mechanism
The variation of opening width, reaction refer to the variation of two joint plane relative distances up and down in test, because shear box seals fully, the opening width in the process of the test can't directly record, and displacement is drawn with extensometer.Extensometer is installed in up and down on the shear box wall, measures the relative displacement of extensometer, because shear box is a rigidity, so extensometer is the changing value of the average opening width of joint plane along the joint plane normal direction.Consider the scrambling of joint plane, test specimen is in shear history, and displacement in various degree can appear in diverse location, and as slippage, climbing, upset etc., so extensometer 7 can be set respectively at four angles of shear box, opening width changes gets four jiaos mean value.See Fig. 4.
Extensometer is fixed on the upper and lower shear box wallboard with Magnetic gauge stand 8, measures the opening width that relative displacement between two Magnetic gauge stands can obtain two joint planes and change.
The concrete steps of rock joint shear-seepage coupling test are as follows:
(1) in the sealing shear box, the rock joint test specimen is installed;
(2) test power loads and displacement measurement, adopts normal direction test power loading and displacement measuring device and tangential test power to load and displacement measuring device, respectively shear box is loaded and mensuration to displacement and tangential displacement, and feed back to computing machine during with fructufy.
(3) use the variation of opening width between the joint plane up and down in the extensometer experiment with measuring process, extensometer is installed in the place, four angles of shear box, and extensometer is connected with computing machine, the result can be real-time transmitted to computing machine.
(4) with seepage detector control hydraulic pressure and measure the flow of water.
Use the present invention, can on the basis of rock joint shear, carry out the shear-seepage coupling test, in process of the test, can change vertical force, horizontal force, hydraulic pressure value arbitrarily, and measure opening width, shear displacemant and fluctuations in discharge; In the process of the test, current can the simulating nature flow state, and therefore, the test findings of acquisition more can be used to instruct actual engineering authentic and validly.Simultaneously, use native system, once obtain desired data, need not many complete equipments, reduced experimentation cost, saved the processing time of test period and late time data, improved work efficiency, operate more humane.
, but should be understood that under the situation that does not break away from relevant protection domain defined by the claims that those skilled in the art can make change and/or revise according to embodiments of the invention describing the present invention property and nonrestrictive description.
Claims (5)
1. rock joint shearing-seepage coupling test system, comprise a shear box, one test power loads and displacement measuring device, an one opening width measurement mechanism and a computing machine, described shear box has an intake tunnel and an exhalant canal, it is characterized in that, also comprise a seepage detector, this seepage detector comprises a water feed apparatus and a water flow measurement mechanism, the water inlet of the intake tunnel of this water feed apparatus UNICOM shear box, the water delivering orifice of the exhalant canal of water flow measurement mechanism UNICOM shear box, described water flow measurement mechanism comprises a header tank, one second flowmeter; Second flowmeter is connected between the water delivering orifice and header tank of shear box, second flowmeter links to each other with computing machine, described water flow measurement mechanism also comprises a back-pressure charger, one second hydraulic pressure transducer and a controller, second hydraulic pressure transducer is installed on the rising pipe, be electrically connected with controller, controller is electrically connected with the back-pressure charger, the discharge pressure of control rising pipe, the pressure differential of assurance water inlet pipe and rising pipe; The back-pressure charger is installed between second flowmeter and second hydraulic pressure transducer, and controller is controlled by computer servo.
2. rock joint shearing-seepage coupling test system according to claim 1 is characterized in that, described water flow measurement mechanism also comprises a pressure inductor, and pressure inductor is installed between second flowmeter and the header tank, links to each other with computing machine.
3. rock joint shearing-seepage coupling test system according to claim 1 and 2 is characterized in that, described water feed apparatus comprises a reserve tank, a hydraulic pressure charger, one first hydraulic pressure transducer; First hydraulic pressure transducer is installed on the water inlet pipe, is electrically connected with controller, and the hydraulic pressure charger is installed between first hydraulic pressure transducer and the reserve tank, and controller is controlled by computer servo.
4. rock joint shearing-seepage coupling test system according to claim 3 is characterized in that, described water feed apparatus also comprises a first flow meter, and the first flow meter is installed between reserve tank and the hydraulic pressure charger, and the first flow meter links to each other with computing machine.
5. rock joint shearing-seepage coupling test system according to claim 3 is characterized in that, the header tank of described water flow measurement mechanism is a closed container, and this header tank has an outlet that switch control is arranged, and leads to the reserve tank of water feed apparatus.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007100404575A CN101059495B (en) | 2007-05-09 | 2007-05-09 | rock joint shearing-seepage coupling test system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007100404575A CN101059495B (en) | 2007-05-09 | 2007-05-09 | rock joint shearing-seepage coupling test system |
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| CN101059495A CN101059495A (en) | 2007-10-24 |
| CN101059495B true CN101059495B (en) | 2011-12-07 |
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| CN102944665B (en) * | 2012-11-22 | 2015-10-21 | 武汉大学 | Be applicable to shear box and the test method of rock joint shear seepage coupling test |
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| CN107796711B (en) * | 2017-09-20 | 2019-11-19 | 天津大学 | A method of for testing complete sample and structural plane dynamic shear strength |
| CN108375533A (en) * | 2017-10-11 | 2018-08-07 | 同济大学 | A kind of voltage stabilizing of the full coupled shear-flow test of rock joint and pressure difference control system |
| CN107860697A (en) * | 2017-11-08 | 2018-03-30 | 河南理工大学 | A kind of rock fracture shearing seepage flow test device and its test method |
| CN108562481B (en) * | 2018-04-16 | 2021-01-05 | 北京工业大学 | Fixed extensometer cutting edge rigidity device |
| CN110687274B (en) * | 2019-11-18 | 2022-01-11 | 河南工程学院 | Rock shearing-seepage testing machine and testing method thereof |
| CN110907268B (en) * | 2019-12-31 | 2024-09-24 | 贵州理工学院 | Rock shear strength tester |
| CN111562182A (en) * | 2020-05-15 | 2020-08-21 | 四川轻化工大学 | Rock joint seepage shear test device |
| CN113049406B (en) * | 2021-03-22 | 2022-11-29 | 南通市飞宇石油科技开发有限公司 | Rock fracture shear test instrument for THMC coupling effect |
| CN112945486A (en) * | 2021-03-29 | 2021-06-11 | 王伟 | Vacuum detection capsule used in container |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201237591Y (en) * | 2007-07-25 | 2009-05-13 | 同济大学 | Rock joint shearing-seepage coupling test system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201237591Y (en) * | 2007-07-25 | 2009-05-13 | 同济大学 | Rock joint shearing-seepage coupling test system |
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