CN106124343A - The pilot system of THMC coupling during consideration rock joint shear - Google Patents

The pilot system of THMC coupling during consideration rock joint shear Download PDF

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Publication number
CN106124343A
CN106124343A CN201610732783.1A CN201610732783A CN106124343A CN 106124343 A CN106124343 A CN 106124343A CN 201610732783 A CN201610732783 A CN 201610732783A CN 106124343 A CN106124343 A CN 106124343A
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normal
loading
shear
servo
frame
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CN201610732783.1A
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CN106124343B (en
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李博
夏才初
杜时贵
陈咭仟
刘日成
陈忠清
钟振
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绍兴文理学院
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/24Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/08Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/082Investigating permeability by forcing a fluid through a sample
    • G01N15/0826Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change

Abstract

A kind of consider the pilot system of THMC coupling during rock joint shear, including main frame and loading structure, loading servo-control system, seepage flow shear box and sealing device, high-low-temperature environmental testing case and seepage flow servo-control system, main frame and loading structure include the orthogonal normal direction loading frame with independent loads ability and horizontal addload framework, load the servo-control system hydraulic loaded servo-control system for conventional test and the motor servo loading system for rheological test;Seepage flow shear box and sealing device are positioned at high-low-temperature environmental testing case, and the motion end of normal direction loading frame and horizontal addload framework is conflicted through high-low-temperature environmental testing case with seepage flow shear box and sealing device;Load servo-control system to be connected with normal direction loading frame and horizontal addload framework respectively.The present invention bears that osmotic pressure is higher, effectively realize the test under THMC coupling and analysis.

Description

The pilot system of THMC coupling during consideration rock joint shear
Technical field
The invention belongs to Geotechnical Engineering field, relate to the pilot system of a kind of complex condition, particularly relate to a kind of cutting During cutting consider thermodynamics, hydraulics, mechanics, chemistry (Thermal-Hydrological-Mechanical-Chemical: THMC) the rock joint pilot system of multi-scenarios method effect.
Background technology
Nuclear waste disposal, natural gas and CO2The large-sized rock mass such as underground storage, geothermal utilization, deep water conservancy and mining engineering Engineering is generally built in jointed rock mass, and under hyperosmosis power effect, the multi-scenarios method characteristic of underground jointed rock mass is to be related to such The key factor that whether safe underground engineering is, the basic problem of the most always rock mechanics circle research and forward position focus, and consider The rock joint shear pilot system of THMC coupling is to disclose the important means of this science basic problem.
Therefore, the understanding and cognition joint that science is deep shear strength characteristics under the conditions of high/low temperature, seepage flow and deformation Percolation law in character, shear history and chemical reaction, set up joint criterion of strength under the conditions of seepage flow, constitutive relation and Full shear-seepage Coupling Constitutive, develops and " considers the test system of THMC coupling during rock joint shear System " it is the most necessary.
Making a general survey of the correlational study of forefathers, the research that (1) carries out at present does not also consider that temperature and chemical reaction are to shearing seepage flow Influencing each other of characteristic;(2) test result carried out at present is mostly focused under relatively low seepage pressure, and under higher seepage pressure The seepage tests and the research that carry out during joint shearing reaches after its peak value are the most blank;(3) under the conditions of constant stiffness Coupled shear-flow test achievement is less, it is difficult to reflects rock joint in nature truly and shears mechanical characteristic really; (4) under action of long-term load, the coupled characteristic research of rock joint is still in blank.Scientific instrument are by scientific research Basic means, experimental technique and the development of scientific research and testing instrument, will push directly on innovation and the development of scientific research, and this is this Bright starting point.
The limitation existed due to the restriction of experimental condition, particularly seepage flow seal means, domestic about rock joint coupling The testing equipment closing test also compares shortage, only Wuhan rock-soil mechanics institute, Wuhan University, University Of Science and Technology Of Shandong and Beijing duty The colleges and universities such as industry technical college are developed in succession, but the osmotic pressure that the shear box of existing device can bear often compares Low, also fail to consider in a device the effect of temperature and chemical reaction.Rock forming mineral can produce dissolving and precipitation in seepage field Deng chemical reaction, directly affect configuration of surface and the mechanical property of rock joint, its reaction rate again by the tremendous influence of temperature, It is contemplated that the coupling of these factors is the Main way studied from now on.
Summary of the invention
In order to overcome existing testing equipment bear that osmotic pressure is relatively low, fail to consider temperature and the effect of chemical reaction, Cannot realize the deficiency of the test under THMC coupling and analysis, it is higher, effective that the present invention provides one to bear osmotic pressure Realize the test under THMC coupling and analysis considers the pilot system of THMC coupling during rock joint shear.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of consider the pilot system of THMC coupling during rock joint shear, including main frame and loading structure, Load servo-control system, seepage flow shear box and sealing device, high-low-temperature environmental testing case and seepage flow servo-control system, described Main frame and loading structure include the orthogonal normal direction loading frame with independent loads ability and horizontal addload framework, described Normal direction loading frame is the mechanism for loading normal force to test specimen, and described horizontal addload framework is for for loading shearing to test specimen The mechanism of power;Described loading servo-control system is for the hydraulic loaded servo-control system of conventional test with for rheological test Motor servo loading system;
Described seepage flow shear box and sealing device include rigidity shear box, upper holder block, lower lock block and at shear history In the caulking gum sheet Texturized with the increase of shear displacemant, rock sample is placed in rigidity shear box, and described rock tries Part is respectively placed with upper holder block and lower lock block in shear direction both sides, leaves for placing described between described upper holder block and lower lock block The space of caulking gum sheet, the upper end of described caulking gum sheet is connected with upper holder block, the lower end of described caulking gum sheet with under press Block connects;Hollow reservoir chamber, the hollow of side is formed between described caulking gum sheet and the fracture seepage face of described rock sample Reservoir chamber connects with water inlet, and the hollow reservoir chamber of opposite side connects with outlet;
Described seepage flow servo-control system includes the infiltration hydraulic pressure control system of the hydraulic pressure for controlling outlet and water inlet Unite and for controlling the seepage velocity control system of the flow velocity of outlet and water inlet;
Described seepage flow shear box and sealing device are positioned at described high-low-temperature environmental testing case, described normal direction loading frame and The motion end of horizontal addload framework is conflicted through described high-low-temperature environmental testing case with described seepage flow shear box and sealing device;Institute State loading servo-control system to be connected with described normal direction loading frame and horizontal addload framework respectively.
Further, the side in the crack of described rock sample is provided with for preventing water from the lateral lateral seal group flowed out Part.
Further, described lateral seal assembly includes rigid seal bar and silica gel sealing layer, on described rigid seal bar Under be arranged symmetrically with, described rigid seal bar is conflicted on described rock sample, and institute is arranged in the inside of described rigid seal bar Stating silica gel sealing layer, the another side of described rigid seal bar contacts with movable ram, and described movable ram is threadeded with framework.
Further, described pilot system also includes for joint being sheared the solution produced in flow event and with oozing The rock particles that stream flows out is timed the solution auto-collection system of quantitative collection, and described outlet is automatic with described solution The entrance connection of collection system.
Described solution auto-collection system includes electronically controlled valve and rotary type solution collection device, during described rotation Solution collection device includes test tube, turntable, rotating shaft and solution collecting box;First end of threeway water inlet pipe is with described outlet even Logical, three directions of described threeway water inlet pipe are respectively mounted described valve, and the second end of described threeway water inlet pipe, the 3rd end are respectively positioned on In described solution collecting box, in described solution collecting box, it is rotatably mounted rotating shaft, described rotating shaft is installed turntable, described turntable A upper circle arranges test tube hole at equal intervals, and test tube is placed in described test tube hole, and the 3rd end of described threeway water inlet pipe is positioned at described The surface of test tube.
Described normal direction loading frame includes that normal direction load cylinder, main machine frame, normal force transducer, normal direction mangneto displacement pass Sensor, spherical universal pressure head and normal direction load backing plate, and described main machine frame has four frame column symmetries to be fixed on testing stand, frame Being connected by crossbeam between trestle, described normal direction load cylinder is fixed on crossbeam;The piston rod of normal direction load cylinder is installed For normal direction load cylinder piston rod displacement being measured and then it being carried out servo-controlled normal direction mangneto displacement transducer, Normal force transducer is connected to piston rod and exposes termination, and spherical universal pressure head is directly connected to normal force transducer, spherical universal Pressure head loads backing plate with normal direction and is connected, and described normal direction loads backing plate and conflicts at described seepage flow shear box and the end face of sealing device;
Described horizontal addload framework includes that horizontal stand, horizontal addload oil cylinder, horizontal force sensor, horizontal mangneto displacement pass Sensor, shearing pressure head and tangentially load backing plate, horizontal addload oil cylinder is arranged in horizontal addload frame ends crossbeam, for adding The horizontal mangneto displacement transducer that load cylinder piston rod displacement measures and then controls it is arranged on horizontal addload oil On the piston rod of cylinder, horizontal force sensor one end is connected to piston rod and exposes termination, and the described horizontal force sensor other end connects The tangential backing plate that loads connects, and described tangential loading backing plate is conflicted in described seepage flow shear box and the side of sealing device.
Described high-low-temperature environmental testing case includes environment casing and auxiliary equipment case, puts rigidity and shear in described environmental cabinet body Box, the upper rigidity shear box left and right sides has respectively to block and equipped with vertical ball;Lead to bottom lower rigidity shear box and box inside Cross horizontal ball to connect;Described auxiliary equipment case is placed under testing stand, and described auxiliary equipment case includes water tank, compressor, liquid storage Device, condenser and discharge outlet.
Described infiltration water pressure control system includes servomotor, reduction box, ball screw, water-storage pressure room, hydraulic sensing Device and water tank, whole seepage flow servo-control system is pressed the signal of the hydrostatic sensor of water inlet and is controlled or by water inlet, outlet Between pressure differential be controlled;The output shaft of described servomotor connects the power shaft of reduction box, the output of described reduction box Axle is connected with ball screw, and described ball-screw links with relief piston, and water-storage pressure room connects described relief piston, described The water inlet of water-storage pressure room connects with water tank, and outlet connects with hollow reservoir chamber;At left and right upper holder block Pipe installing hydraulic pressure Sensor records, and installs flow sensor at water inlet, outlet;
Described seepage velocity control system includes that plunger displacement pump, the water inlet of described plunger displacement pump connect with water tank, outlet with Hollow reservoir chamber connects.
Beneficial effects of the present invention is mainly manifested in:
1), in test specimen is placed in high-low-temperature environmental testing case, can test in the environment of-100 DEG C~+200 DEG C, truly Reflection Practical Project in the temperature field of rock;
2) horizontal addload framework may move, it is simple to installs rock sample, can push in main machine frame after installation;
3) shear box shear direction by can with shear displacemant deformation caulking gum sheet seal, laterally by servo-controlled Oil pressure seals, it is ensured that the good sealing property under multi-scenarios method effect, Thief zone hydraulic pressure can reach 3MPa.
4) solution harvester can collect the solution at day part outflow joint automatically, by computer control, it is not necessary to manual operation, It is easy to the follow-up chemical composition to solution and carries out Accurate Analysis.
5) the double Loading Control System of hydraulic servo and motor servo is used, it is possible to achieve the loading under many arbitrary boundary conditions, Use motor servo control system can realize long-term load test.
Accompanying drawing explanation
Fig. 1 is to consider the front view of the pilot system of THMC coupling during rock joint shear;
Fig. 2 is to consider the side view of the pilot system of THMC coupling during rock joint shear;
Fig. 3 is high and low temperature environment box-section schematic diagram;
Fig. 4 is solution harvester profile;
Fig. 5 is solution harvester turntable top view;
Wherein, reference is as follows: 1-main machine frame;2-normal direction loading frame;3-horizontal addload framework;4-environmental cabinet Body;5-environmental cabinet auxiliary equipment case;6-testing stand;7-shear box;8a-normal direction piston rod;8b-horizontal piston bar;9a-normal direction adds Carry backing plate;9b-tangentially loads backing plate;10-sealing ring;11-insulating;Block is supported on the left of 12a-;Block is supported on the right side of 12b-;13a- Left side ball;Ball on the right side of 13b-;Ball bottom 14-;15-pulley;16-solution harvester;16a-test tube;16b-turntable; 16c-rotating shaft;16d-solution collecting box;16e-valve;The vertical LVDT of 17-;The horizontal LVDT of 18-;19a-upper left briquetting;19b-is right Upper holder block;19c-lower-left briquetting;19d-bottom right briquetting;20a-upper left briquetting pipeline;20b-upper right briquetting pipeline;The left sealing of 21a- Sheet rubber;21b-right caulking gum sheet;The left empty reservoir chamber of 22a-;The right empty reservoir chamber of 22b-.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
With reference to Fig. 1~Fig. 5, a kind of consider the pilot system of THMC coupling during rock joint shear, including main Machine and loading structure, loading servo-control system, seepage flow shear box and sealing device, high-low-temperature environmental testing case and seepage flow servo Control system, described main frame and loading structure include the orthogonal normal direction loading frame 2 with independent loads ability and water Flat loading frame 3, described normal direction loading frame is the mechanism for loading normal force to test specimen, and described horizontal addload framework is for using In the mechanism loading shearing force to test specimen;Described loading servo-control system is for the hydraulic loaded SERVO CONTROL system of conventional test System and the motor servo loading system for rheological test;
Described seepage flow shear box and sealing device include rigidity shear box 7, upper holder block 19a, 19b, lower lock block 19c, 19d and For caulking gum sheet 21a, 21b Texturized with the increase of shear displacemant in shear history, rock sample is placed in just In property shear box 7, described rock sample is respectively placed with upper holder block and lower lock block in shear direction both sides, described upper holder block and under press Leaving the space for placing described caulking gum sheet between block, the upper end of described caulking gum sheet is connected with upper holder block, described The lower end of caulking gum sheet is connected with lower lock block;Formed between described caulking gum sheet and the fracture seepage face of described rock sample Hollow reservoir chamber 22a, 22b, the hollow reservoir chamber of side connects with water inlet, and the hollow reservoir chamber of opposite side is with outlet even Logical;
Described seepage flow servo-control system includes the infiltration hydraulic pressure control system of the hydraulic pressure for controlling outlet and water inlet Unite and for controlling the seepage velocity control system of the flow velocity of outlet and water inlet;
Described seepage flow shear box and sealing device are positioned at described high-low-temperature environmental testing case, described normal direction loading frame and The motion end of horizontal addload framework is conflicted through described high-low-temperature environmental testing case with described seepage flow shear box and sealing device;Institute State loading servo-control system to be connected with described normal direction loading frame and horizontal addload framework respectively.
Further, the side in the crack of described rock sample is provided with for preventing water from the lateral lateral seal group flowed out Part.
Further, described lateral seal assembly includes rigid seal bar and silica gel sealing layer, on described rigid seal bar Under be arranged symmetrically with, described rigid seal bar is conflicted on described rock sample, and institute is arranged in the inside of described rigid seal bar Stating silica gel sealing layer, the another side of described rigid seal bar contacts with movable ram, and described movable ram is threadeded with framework.
Further, described pilot system also includes for joint being sheared the solution produced in flow event and with oozing The rock particles that stream flows out is timed the solution auto-collection system of quantitative collection, and described outlet is automatic with described solution The entrance connection of collection system.
Described solution auto-collection system includes electronically controlled valve 16e and rotary type solution collection device, described turn Time dynamic, solution collection device includes test tube 16a, turntable 16b, rotating shaft 16c and solution collecting box 16d;First end of threeway water inlet pipe Connecting with described outlet, three directions of described threeway water inlet pipe are respectively mounted described valve, the second of described threeway water inlet pipe End, the 3rd end are respectively positioned in described solution collecting box, are rotatably mounted rotating shaft in described solution collecting box, and described rotating shaft is pacified Dress turntable, on described turntable, a circle arranges test tube hole at equal intervals, and test tube is placed in described test tube hole, described threeway water inlet pipe 3rd end is positioned at the surface of described test tube.
Described normal direction loading frame includes normal direction load cylinder, main machine frame 1, normal force transducer, normal direction mangneto displacement Sensor, spherical universal pressure head and normal direction load backing plate 9a, and described main machine frame 1 has four frame column symmetries to be fixed on testing stand On 6, being connected by crossbeam between frame column, described normal direction load cylinder is fixed on crossbeam;Piston rod at normal direction load cylinder Upper installation is for measuring normal direction load cylinder piston rod displacement and then it carrying out servo-controlled normal direction mangneto displacement Sensor, normal force transducer is connected to normal direction piston rod 8a and exposes termination, and spherical universal pressure head is direct with normal force transducer Connecting, spherical universal pressure head and normal direction load backing plate 9a and are connected, the loading backing plate conflict of described normal direction at described seepage flow shear box and The end face of sealing device;
Described horizontal addload framework includes that horizontal stand, horizontal addload oil cylinder, horizontal force sensor, horizontal mangneto displacement pass Sensor, shearing pressure head and tangential loading backing plate 9b, horizontal addload oil cylinder is arranged in horizontal addload frame ends crossbeam, for right The horizontal mangneto displacement transducer that load cylinder piston rod displacement measures and then controls it is arranged on horizontal addload On the piston rod of oil cylinder, horizontal force sensor one end is connected to horizontal piston bar 8b and exposes termination, and described horizontal force sensor is another One end connects shearing and loads backing plate 9b connection, and described tangential loading backing plate 9b conflicts at described seepage flow shear box and sealing dress The side put.
Described high-low-temperature environmental testing case includes environment casing and auxiliary equipment case, puts rigidity and shear in described environmental cabinet body Box, the upper rigidity shear box left and right sides has respectively to block and equipped with vertical ball;Lead to bottom lower rigidity shear box and box inside Cross horizontal ball to connect;Described auxiliary equipment case is placed under testing stand, and described auxiliary equipment case includes water tank, compressor, liquid storage Device, condenser and discharge outlet.
Described infiltration water pressure control system includes servomotor, reduction box, ball screw, water-storage pressure room, hydraulic sensing Device and water tank, whole seepage flow servo-control system is pressed the signal of the hydrostatic sensor of water inlet and is controlled or by water inlet, outlet Between pressure differential be controlled;The output shaft of described servomotor connects the power shaft of reduction box, the output of described reduction box Axle is connected with ball screw, and described ball-screw links with relief piston, and water-storage pressure room connects described relief piston, described The water inlet of water-storage pressure room connects with water tank, and outlet connects with hollow reservoir chamber;At left and right upper holder block Pipe installing hydraulic pressure Sensor records, and installs flow sensor at water inlet, outlet;
Described seepage velocity control system includes that plunger displacement pump, the water inlet of described plunger displacement pump connect with water tank, outlet with Hollow reservoir chamber connects.
Configuration time below for being embodied as and connection example.
See accompanying drawing 1 and Fig. 2, a kind of consider that the pilot system of THMC coupling includes during rock joint shear: Main frame and loading structure, loading servo-control system, seepage flow shear box and sealing device, high-low-temperature environmental testing case, seepage flow are watched Take control system, system and solution auto-collection system are measured in data acquisition.
Described main frame loading system is mainly by the orthogonal normal direction loading frame 2 with independent loads ability and level Forming to loading frame 3, framework uses high grade spheroidal graphite cast-iron one-piece casting to form, and frame stiffness is 6GN/m.Described normal direction adds Carry framework and mainly include normal direction load cylinder, main machine frame, force transducer, mangneto displacement transducer, spherical universal pressure head, normal direction Load backing plate etc..Described main machine frame 1 has four frame column symmetries to be fixed on testing stand 6, is connected by crossbeam between frame column, Described normal direction load cylinder is double acting single-rod piston hydraulic cylinder, is fixed on normal direction loading frame crossbeam.Oil is loaded in normal direction Mangneto displacement transducer is installed, for normal direction load cylinder piston rod displacement is measured and then entered it on the piston rod of cylinder Row SERVO CONTROL.Force transducer is connected to piston rod 8a and exposes termination, and spherical universal pressure head and force transducer are directly connected to spherical Universal pressing head loads backing plate 9a by normal direction and transmits Normal stress to test specimen, and it is to enable Normal stress that normal direction loads backing plate Relatively it is delivered evenly on test specimen, prevents the generation of bias.Described horizontal addload framework uses floating type loading frame, can be left Moving right, when installing test specimen, horizontal addload framework is on the left of Fig. 1, it is simple to install, and pushes right side main frame frame after installing In frame;Described horizontal addload framework mainly includes horizontal stand, horizontal addload oil cylinder, force transducer, mangneto displacement transducer, cuts Hob head, shearing loads backing plate, Antifriction linear guide rail etc.;Horizontal addload oil cylinder is arranged on horizontal addload frame ends crossbeam In, mangneto displacement transducer is arranged on the piston rod 8b of horizontal addload oil cylinder, for carrying out load cylinder piston rod displacement Measure and then control it.Force transducer one end is connected to piston rod and exposes termination, and the other end connects shears pressure head 9b.
Described loading servo-control system includes for the hydraulic loaded servo-control system of conventional test with for rheology The motor servo Loading Control System of test.The described hydraulic loaded servo-control system for conventional test, mainly by hydraulic pressure Oil sources, hydraulic pump, servo valve, servo controller and sensor etc. form;During conventional test, servo loading is mainly by liquid Force feed source provides power, then is received sensor signal and control signal by servo controller and contrast and then send to servo valve corresponding Control signal regulates oil cylinder oil inlet amount to realize SERVO CONTROL, and then realizes people in process of the test and can control before computer Process of the test.The described motor servo Loading Control System tested for rheology (loading for a long time), mainly by servomotor, deceleration Machine, synchronous cog belt, ball screw, oil storage cylinder, servo controller, sensor etc. form;During rheological test, by servo Driven by motor decelerator drives ball-screw by synchronous cog belt, and ball-screw drives oil storage cylinder inner carrier to move back and forth, and lives Plug applies pressure when positive movement to the hydraulic oil in oil storage cylinder, and oil pressure is by pressure duct and then is delivered to load cylinder, There is provided power for rheological test, such as, shear stress can be kept when shear displacemant is 5mm in 100h constant, weigh the most again Newly start to shear;Described servo-control system is controlled by the control software using C Plus Plus to write under windows platform System, software interface is friendly, powerful, be easy to extension, can realize normal Normal stress, normal Normal Displacement, normal normal stiffness three kinds Rock joint overall process coupling test under boundary condition.
Described seepage flow shear box and sealing device, including rigidity shear box 7, upper left briquetting 19a, upper right briquetting 19b, lower-left Briquetting 19c, bottom right briquetting 19d, left caulking gum sheet 21a, right caulking gum sheet 21b and lateral seal assembly etc..A size of The cube rock joint test specimen of 20cm × 10cm × 10cm is placed in rigidity shear box 7, and test specimen is respectively put in shear direction both sides It is equipped with upper holder block and lower lock block, between upper holder block and lower lock block, leaves a fixed gap, be used for placing caulking gum sheet;Described sealing Sheet rubber can be Texturized with the increase of shear displacemant in shear history, thus realizes continuous print water seal effect;Described close Envelope sheet rubber and upper lower lock block form left empty reservoir chamber 22a, right empty reservoir chamber 22b, by hollow reservoir chamber, hydraulic pressure is equal Even act on seepage flow face, joint, it is to avoid hydraulic pressure is converged, seepage flow in joint in nature and engineering True form, Thief zone hydraulic pressure can reach 3MPa;Described upper holder block is provided with upper left briquetting pipeline 20a, upper right briquetting pipeline 20b, described upper holder block pipeline connects with hollow reservoir chamber, and the upper holder block pipeline of both sides is connected with hydrostatic sensor, can be accurate Differential water pressures between the measurement actual water inlet in joint and outlet, rather than the differential water pressures between outer conduit;Side, joint is arranged There is lateral seal assembly, utilize servo-controlled oil pressure to make sealant be fitted tightly at joint, and control oil pressure more than infiltration Hydraulic pressure, thus realize lateral seal.
See accompanying drawing 3, high-low-temperature environmental testing case can be used for the test specimen such as metal, nonmetal, composite and component- Mechanics properties testing test in 100 DEG C~+200 DEG C of temperature environments, it is GB 10592-2008 " high/low temperature that technology performs standard Proof box technical conditions ".Described high-low-temperature environmental testing case is mainly made up of environment casing 4 and auxiliary equipment case 5 thereof.Environmental cabinet Internal shear box 7 of putting, the upper shear box left and right sides has the left block 12a of supporting, the right block 12b that supports respectively, and equipped with a left side vertical ball 13a, Right vertical ball 13b, it is ensured that when normal direction loads, test specimen only can move up and down;Ball 14 is passed through bottom down cut box and box inside Connect, it is ensured that shearing loads shear box at present and only can horizontally slip, and casing exterior bottom, equipped with pulley 15, can release horizontal addload Framework;Cabinets cavity and outer wall all use high-quality stainless steel material, filling multilayer compound insulating material between inner chamber, outer wall, are formed Insulating 11, on tank wall, perforate at water inlet, outlet, left and right pipeline and loading pressure head, has sealing ring 10 around hole Seal, it is ensured that the sealing of tapping;Heating element heater uses helical form Kanthal wire;Temperature element is PT100 thermal resistance; Refrigeration system uses compressor cooling;Temperature control system is by temperature element (thermocouple), central arithmetic unit, temperature monitor Table, and the composition such as computer operation human-computer interaction interface;It is additionally provided with earth leakage protective, overcurrent protection, fastp-acting fuse; Described environment casing connect have auxiliary equipment case 5 to be placed under testing stand, described auxiliary equipment include water tank, compressor, reservoir, Condenser, discharge outlet etc..
Described seepage flow servo-control system includes permeating water pressure control system and seepage velocity control system, goes out, water inlet Hydraulic pressure and flow velocity controlled respectively by system.Infiltration water pressure control system mainly by servomotor, reduction box, ball screw, Water-storage pressure room, hydrostatic sensor, travel switch and water tank composition, whole seepage flow servo-control system can press the liquid of water inlet The signal (ordinary water pressure) of pressure sensor controls or is controlled by the pressure differential (normal permeable pressure head) between entery and delivery port;Increasing During pressure, ball-screw advances relief piston, to positive movement, water-storage pressure room is applied pressure, and the water of water-storage pressure room leads to Cross the hollow reservoir chamber 22a entrance Rock Joint Plane that lower lock block is formed, flow out from the hollow reservoir chamber 22b of opposite side afterwards, Seepage water pressure before and after the rock joint hydrostatic sensor being connected on left and right upper holder block pipeline 20a, 20b records, Flow velocity is recorded by the flow sensor of gateway;Servomotor is controlled by servo controller according to the signal gathered, thus Water pressure in regulation water-storage pressure room keeps constant.Seepage velocity control system is mainly realized by plunger displacement pump, and shares above-mentioned The assemblies such as the infiltration water tank of water pressure control system, hydrostatic sensor, for controlling the flow velocity being added on water inlet;Two cover systems are joined Close and use to realize using when tiny flow quantity the Transient Method of measurement permeable pressure head, the measurement of discharge when flow is in and can survey scope Steady state method carries out osmotic control.
Described data acquisition is measured system and is included for monitoring displacement, load, oil pressure, hydraulic pressure, flow velocity, temperature, humidity Sensor, the data of each sensor are connected into computer and monitor in real time.Wherein, 2 mangneto displacement transducers are respectively used to monitoring Normal direction load cylinder and the displacement of shearing load cylinder inner piston rod, 5 linear displacement transducers (LVDT) are respectively used to monitoring The normal direction of test specimen and shear displacemant, 2 force transducers are respectively used to monitor normal force and shearing force;4 oil pressure sensors are respectively For monitoring normal direction and the oil pressure sheared in load cylinder and lateral seal assembly;2 hydrostatic sensors are respectively used to monitoring Go out, the hydraulic pressure of water inlet;2 flow sensors are respectively used to detect, the flow velocity of water inlet;6 temperature sensors are used respectively Temperature in monitoring test specimen surrounding;1 humidity sensor is for monitoring the humidity in high-low-temperature environmental testing case.Wherein it is used for watching Displacement that clothes control and load gather monitoring mainly by controller, the piston rod inner mangneto displacement transducer of load cylinder, Force transducer, microcomputer and support software outside linear displacement transducer, piston rod realize;The normal direction of joint plane and cutting Cut the displacement linear displacement transducer (LVDT) being installed on shear box to measure, normal direction 17 (4) and shearing 18 (1) position Displacement sensor all uses that precision is high, capacity of resisting disturbance strong and the differential transformer displacement transducer of good stability (without temperature drift, time Drift).Being connected to 0~10L/min ALICAT L-Series mass flowmenter at shear box entry and exit, it has precision height, repeats The advantages such as good, the fast response time of property, accurately can measure seepage discharge in shear history.
See accompanying drawing 4-5, water outlet is provided with solution auto-collection system 16, described solution auto-collection system bag Include test tube 16a, turntable 16b, rotating shaft 16c, solution collecting box 16d, valve 16e, electronic controller.Described valve is by Electronic Control Opening and closing, according to the time set by the solution injecting tube of set amount;Described test tube totally 12 be placed in turntable, can by centre Rotating shaft 16c rotates, and is turned an angle by Electronic Control certain time, such as rotates 30 degree in 12 hours per hour, thus As required joint is sheared the solution produced in flow event and the rock particles with seepage flow outflow is timed quantitative Collect, in order to the solution collected is carried out chemical composition analysis.

Claims (8)

1. one kind considers the pilot system of THMC coupling during rock joint shear, it is characterised in that: described test system System include main frame and loading structure, loading servo-control system, seepage flow shear box and sealing device, high-low-temperature environmental testing case and Seepage flow servo-control system, described main frame and loading structure include that the orthogonal normal direction with independent loads ability loads frame Frame and horizontal addload framework, described normal direction loading frame is the mechanism for loading normal force to test specimen, described horizontal addload frame Frame is the mechanism for loading shearing force to test specimen;Described loading servo-control system is for the hydraulic loaded servo of conventional test Control system and the motor servo loading system for rheological test;
Described seepage flow shear box and sealing device include rigidity shear box, upper holder block, lower lock block and in shear history with The increase of shear displacemant and Texturized caulking gum sheet, rock sample is placed in rigidity shear box, and described rock sample exists Shear direction both sides are respectively placed with upper holder block and lower lock block, leave for placing described sealing between described upper holder block and lower lock block The space of sheet rubber, the upper end of described caulking gum sheet is connected with upper holder block, and the lower end of described caulking gum sheet is with lower lock block even Connect;Hollow reservoir chamber, the hollow water storage of side is formed between described caulking gum sheet and the fracture seepage face of described rock sample Room connects with water inlet, and the hollow reservoir chamber of opposite side connects with outlet;
Described seepage flow servo-control system include the hydraulic pressure for controlling outlet and water inlet infiltration water pressure control system and For controlling the seepage velocity control system of the flow velocity of outlet and water inlet;
Described seepage flow shear box and sealing device are positioned at described high-low-temperature environmental testing case, described normal direction loading frame and level The motion end of loading frame is conflicted through described high-low-temperature environmental testing case with described seepage flow shear box and sealing device;Described add Carry servo-control system to be connected with described normal direction loading frame and horizontal addload framework respectively.
2. the pilot system of THMC coupling during consideration rock joint shear as claimed in claim 1, its feature exists In: the side in the crack of described rock sample is provided with for preventing water from the lateral lateral seal assembly flowed out.
3. the pilot system of THMC coupling during consideration rock joint shear as claimed in claim 2, its feature exists Rigid seal bar and silica gel sealing layer is included in: described lateral seal assembly, described rigid seal bar layout symmetrical above and below, described Rigid seal bar is while conflicting on described rock sample, and described silica gel sealing layer, institute are arranged in the inside of described rigid seal bar The another side stating rigid seal bar contacts with movable ram, and described movable ram is threadeded with framework.
4. the pilot system of THMC coupling during the consideration rock joint shear as described in one of claims 1 to 3, its It is characterised by: described pilot system also includes for joint being sheared the solution produced in flow event and with seepage flow outflow Rock particles is timed the solution auto-collection system of quantitative collection, described outlet and described solution auto-collection system Entrance connection.
5. the pilot system of THMC coupling during consideration rock joint shear as claimed in claim 4, its feature exists In: described solution auto-collection system includes electronically controlled valve and rotary type solution collection device, solution during described rotation Collection device includes test tube, turntable, rotating shaft and solution collecting box;First end of threeway water inlet pipe connects with described outlet, institute Three directions stating threeway water inlet pipe are respectively mounted described valve, and the second end of described threeway water inlet pipe, the 3rd end are respectively positioned on described In solution collecting box, in described solution collecting box, it is rotatably mounted rotating shaft, described rotating shaft is installed turntable, on described turntable one Circle arranges test tube hole at equal intervals, and test tube is placed in described test tube hole, and the 3rd end of described threeway water inlet pipe is positioned at described test tube Surface.
6. the pilot system of THMC coupling during the consideration rock joint shear as described in one of claims 1 to 3, its It is characterised by: described normal direction loading frame includes normal direction load cylinder, main machine frame, normal force transducer, normal direction mangneto displacement Sensor, spherical universal pressure head and normal direction load backing plate, and described main machine frame has four frame column symmetries to be fixed on testing stand, Being connected by crossbeam between frame column, described normal direction load cylinder is fixed on crossbeam;The piston rod of normal direction load cylinder is pacified Dress is for measuring normal direction load cylinder piston rod displacement and then it carrying out servo-controlled normal direction mangneto displacement sensing Device, normal force transducer is connected to piston rod and exposes termination, and spherical universal pressure head is directly connected to normal force transducer, and spherical ten thousand Loading backing plate to pressure head with normal direction to be connected, described normal direction loads backing plate and conflicts on described seepage flow shear box and the top of sealing device Face;
Described horizontal addload framework includes horizontal stand, horizontal addload oil cylinder, horizontal force sensor, horizontal mangneto displacement sensing Device, shearing pressure head and tangentially load backing plate, horizontal addload oil cylinder is arranged in horizontal addload frame ends crossbeam, for loading The horizontal mangneto displacement transducer that cylinder piston rod displacement measures and then controls it is arranged on horizontal addload oil cylinder Piston rod on, horizontal force sensor one end is connected to piston rod and exposes termination, and the described horizontal force sensor other end connects to be cut The tangential backing plate that loads connects, and described tangential loading backing plate is conflicted in described seepage flow shear box and the side of sealing device.
7. the pilot system of THMC coupling during the consideration rock joint shear as described in one of claims 1 to 3, its It is characterised by: described high-low-temperature environmental testing case includes environment casing and auxiliary equipment case, puts rigidity and cut in described environmental cabinet body Cutting box, the upper rigidity shear box left and right sides has respectively to block and equipped with vertical ball;Bottom lower rigidity shear box and box inside Connected by horizontal ball;Described auxiliary equipment case is placed under testing stand, and described auxiliary equipment case includes water tank, compressor, storage Liquid device, condenser and discharge outlet.
8. the pilot system of THMC coupling during the consideration rock joint shear as described in one of claims 1 to 3, its It is characterised by: described infiltration water pressure control system includes servomotor, reduction box, ball screw, water-storage pressure room, hydraulic sensing Device and water tank, whole seepage flow servo-control system is pressed the signal of the hydrostatic sensor of water inlet and is controlled or by water inlet, outlet Between pressure differential be controlled;The output shaft of described servomotor connects the power shaft of reduction box, the output of described reduction box Axle is connected with ball screw, and described ball-screw links with relief piston, and water-storage pressure room connects described relief piston, described The water inlet of water-storage pressure room connects with water tank, and outlet connects with hollow reservoir chamber;At left and right upper holder block Pipe installing hydraulic pressure Sensor, installs flow sensor at water inlet, outlet;
Described seepage velocity control system includes that plunger displacement pump, the water inlet of described plunger displacement pump connect with water tank, outlet and hollow Reservoir chamber connects.
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CN106596293A (en) * 2016-12-19 2017-04-26 中国矿业大学(北京) Portable type rock mechanics multi-functional test instrument tester
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CN106644889B (en) * 2017-02-10 2019-05-14 同济大学 The wide rock joint seepage apparatus of controllable gap under a kind of Thief zone pressure
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CN107356506A (en) * 2017-06-28 2017-11-17 同济大学 A kind of rock joint seepage flow Loading Control System and its control method
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CN108152473A (en) * 2017-12-10 2018-06-12 北京工业大学 A kind of rock fracture pilot system of water-ice-rock coupling mechanism
CN108204916A (en) * 2018-01-26 2018-06-26 河北工业大学 A kind of shearing-low temperature coupling experiment device and method for penetrating through crack
CN110455646A (en) * 2019-09-04 2019-11-15 浙江大学 A kind of visualization interface direct shear apparatus being contemplated that temperature, seepage effect
CN110455646B (en) * 2019-09-04 2020-05-22 浙江大学 Visual interface direct shear apparatus capable of considering temperature and seepage effect
CN110687272A (en) * 2019-11-04 2020-01-14 中山大学 Rock joint face shear seepage test device and test method based on geothermal exploitation
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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