CN103698493B - The multiple dimensioned grand mesoscale experiments machine of a kind of rock-soil material multi-scenarios method - Google Patents
The multiple dimensioned grand mesoscale experiments machine of a kind of rock-soil material multi-scenarios method Download PDFInfo
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Abstract
The invention discloses the multiple dimensioned grand mesoscale experiments machine of a kind of rock-soil material multi-scenarios method, be applicable to rock soil medium deformation and damage real-time follow-up under the different coupling condition of power-water-temperature, comprise MTS rigid press, airtight transparent chamber, macroscopic view optical camera, thin sight optical camera, LVDT displacement transducer, humidity controller, humidity temperature pickup, control and acquisition system and rigidity workbench, these functions of the equipments are complete, measuring accuracy is high, the micro character of real-time follow-up material damage change and macroscopic token, under can realizing single shaft condition, mechanical parameters is determined, waterpower micromechanism of damage and long-term Rheology Mechanism identification, very be applicable to modern ground Research Requirements.
Description
Technical field
The present invention relates to experiment measuring instrument technical field, more specifically relate to the multiple dimensioned grand mesoscale experiments machine of a kind of rock-soil material multi-scenarios method, this testing machine is applicable to rock soil medium deformation and damage real-time follow-up under the different coupling condition of power-water-temperature, under can realizing single shaft condition, mechanical parameters is determined, waterpower micromechanism of damage and long-term Rheology Mechanism identification.
Background technology
Rock-soil material subjects the impact of the multiple couplings such as different power-water-temperature-chemistry in engineering construction, operation, maintenance process, especially in the underground works of deep (oil, natural gas strategy energy storage, high radioactive nucleus waste store, the exploitation of unconventionaloil pool field) show more outstanding.Meanwhile, often there is significant nonuniformity, noncontinuity and anisotropy in rock soil medium, and its deformation failure analysis relates to the Formation and Evolution process in grand thin sight crack interaction rule, local weakness district.Rock soil medium gradual destruction mechanism is the foundation of evaluation engineering rock terrain macro mechanics parameter, also be the basis of the geologic hazards such as prediction underground engineering wall rock collapses, comes down, rock burst, earthquake, also being the key obtaining rock soil medium macroscopical mechanical parameters, is rock-soil mechanics important component part.Therefore, under research rock-soil material multi-scenarios method condition, multiple dimensioned behavior discloses rock soil medium Mechanism of Deformation And Failure and rule for deep, the generation of predictive engine disaster and instruct engineering design tool to be of great significance.
According to periodical literature and monograph retrieval, rarely have report about the multiple dimensioned grand mesoscale experiments machine of rock-soil material multi-scenarios method, at present, domestic and international main achievement concentrates on the test of rock-soil material multi-scenarios method.(the some progress of rock mechanics shop experiment technology [J] such as Zhu Jiebing, solid mechanics journal, 2010, 31, 209-215) three axle Seepage-stress coupling systems are introduced, and about utilizing optical measuring system to carry out the considerably less of multi-scenarios method test, (the fissure rock multi-scenarios method based on image digitazation technology is analyzed to contain the people such as Jinchang, engineering mechanics [J], 2007, 24, 30-35) mainly introduce the stage by stage analysis of image digitazation technology to multi-scenarios method different phase, there is no the real-time follow-up under multi-scenarios method condition, the Measurement and analysis introduction of grand thin sight different scale is not had yet.
At present, in periodical and monograph retrieval, all do not search out the report about the multiple dimensioned grand mesoscale experiments machine of rock-soil material multi-scenarios method.
Summary of the invention
The object of the invention is to there are provided the multiple dimensioned grand mesoscale experiments machine of a kind of rock-soil material multi-scenarios method, realize different scale whole audience strain measurement under different load coupling condition, for rock-soil material grand mesomechanics characteristic Measurement accuracy provides technical support, these functions of the equipments are complete, measuring accuracy is high, is very applicable to modern ground Research Requirements.
To achieve these goals, the present invention adopts following technical scheme:
The multiple dimensioned grand mesoscale experiments machine of a kind of rock-soil material multi-scenarios method, comprise MTS rigid press, airtight transparent chamber, macroscopic view optical camera, thin sight optical camera, LVDT displacement transducer, humidity controller, humidity temperature pickup, control and acquisition system and rigidity workbench, its annexation is: the moving piston of MTS rigid press is through airtight transparent chamber top, with scalable plastics gum cover sealing, the weighted base of MTS rigid press is fixed on rigidity workbench through bottom airtight transparent chamber, with silica gel sealing, the two ends of LVDT displacement transducer are separately fixed on the stressed bearing of MTS moving piston and bottom, LVDT displacement transducer is in airtight transparent chamber, airtight transparent chamber is fixed on rigidity workbench by support bar, macroscopic view optical camera camera lens stretches into side in airtight transparent chamber by lens protection O-ring seal, the fuselage of macroscopic view optical camera is fixed on rigidity workbench by adjustable backstay, the optical amplifier camera lens of thin sight optical camera stretches into opposite side in airtight transparent chamber by lens protection O-ring seal, the fuselage of thin sight optical camera is fixed on rigidity workbench by positioning support, airtight transparent chamber arranges moisture import and damp exit, moisture import is connected with humidity controller with damp exit, humidity temperature pickup passes aperture in airtight transparent chamber and is arranged in airtight transparent chamber, LVDT displacement transducer, macroscopic view optical camera, thin sight optical camera, humidity controller and humidity temperature pickup are all connected with acquisition system with control.
Positioning support x, y, z tri-directions can translation and rotation, passes through Electronic control.
The present invention compared with prior art, has the following advantages and effect:
1. measure macroscopic view and carefully see different scale (100 μm of-cm) whole audience strain measurement, being equivalent to paste the foil gauge of ten hundreds of different directions at specimen surface;
2. the different load coupled combination test of realizable force-water-temperature three kinds;
3. real-time follow-up material damage change micro character and macroscopic token;
4. system versatility is good, reliability is high, precision high (humidity change can control within 1%, meso-scale strain precision reach 10
-4), the requirement of rock-soil mechanics multi-scenarios method meso-mechanical analysis can be met.
Accompanying drawing explanation
Fig. 1 is the multiple dimensioned grand mesoscale experiments machine structural representation of a kind of rock-soil material multi-scenarios method.
Wherein: 1-MTS rigid press; 2-moving piston; 3-weighted base; 4-macroscopical optical camera (IMPREX 16M); 5-lens protection O-ring seal, 6-carefully see optical camera (Manta 4M), 7-backstay; 8-positioning support; 9-support bar, 10-airtight transparent vessel, 11-rigidity workbench; 12-humidity controller; the import of 13-moisture, 14-damp exit, 15-LVDT displacement transducer; 16-humidity temperature pickup (JUMO), 17-control and acquisition system (PCI capture card and Labview software).
Embodiment
embodiment 1:
Below in conjunction with accompanying drawing, the present invention is described in further detail:
As shown in Figure 1, the multiple dimensioned grand mesoscale experiments machine of a kind of rock-soil material multi-scenarios method, it comprises MTS rigid press 1, airtight transparent chamber 10, macroscopical optical camera 4, thin sight optical camera 6, LVDT displacement transducer 15, humidity controller 12, humidity temperature pickup 16, control and acquisition system 17 and rigidity workbench 11.The moving piston 2 of MTS rigid press 1 is through airtight transparent chamber 10 top, with scalable plastics gum cover sealing, the weighted base 3 of MTS rigid press 1 is fixed on rigidity workbench 11 through bottom airtight transparent chamber 10, with silica gel sealing, one end of LVDT displacement transducer 15 utilizes becket to be fixed on moving piston 2, other end metal plate is fixed on weighted base 3, telescopic displacement measurement probe contacts with the metal plate be fixed on weighted base 3, measuring sonde accompany movement piston 2 moves together, thus record axial displacement value, LVDT displacement transducer 15 is in airtight transparent chamber 10, airtight transparent chamber 10 is fixed on rigidity workbench 11 by support bar 9, macroscopic view optical camera 4 camera lens stretches into side in airtight transparent chamber 10 by lens protection O-ring seal 5, the fuselage of macroscopic view optical camera 4 is fixed on rigidity workbench 11 by adjustable backstay 7, the optical amplifier camera lens of thin sight optical camera 6 stretches into opposite side in airtight transparent chamber 10 by lens protection O-ring seal 5, the fuselage of thin sight optical camera 6 is fixed on rigidity workbench 11 by positioning support 8, airtight transparent chamber 10 is arranged moisture import 13 and damp exit 14, moisture import 13 is connected with humidity controller (JUMO) 12 with damp exit 14, humidity temperature pickup 16 passes aperture in airtight transparent chamber 10 and is arranged in airtight transparent chamber 10, LVDT displacement transducer 15, macroscopic view optical camera 4, thin sight optical camera 6, humidity controller 12 and humidity temperature pickup 16 are connected with acquisition system 17 with control.
MTS rigid press 1 adopts electrohydraulic servo-controlling system, power is put on sample end by moving piston 2 by MTS rigid press 1, this MTS rigid press 1 peak load is 600KN, and can be realized by stress or displacement two kinds of load modes, it is 1 μm/s that minimum displacement applies speed.
Airtight transparent chamber 10 volume is 600x450x450mm, and final obturation effect meets test demand, and overall moisture fluctuation controls within 2%, and temperature is almost then invariable.
The model of macroscopic view optical camera 4 is IMPREX 16M, comprise ccd image sensor, optical lens, aperture regulation and control and fuselage, the pixel of this camera is 1,600 ten thousand pixels, its ccd image sensor physical size is 24x36mm, and use Schneider optical lens to focus, camera lens and sample to be tested surface keep 24cm distance to guarantee best shooting effect, and fuselage is fixed on rigidity workbench 11 by adjustable backstay 7, and optical pickup image is passed in computing machine by data line.
The model of thin sight optical camera 6 is Manta 4M, comprise ccd image sensor, optical amplifier camera lens and fuselage, the pixel of camera is 4,000,000 pixels, ccd image sensor physical size is 15x15mm, and use 10 times of amplification optical lens to carry out track up to sample to be tested surface, fuselage is arranged on x, y, z tri-directions can on the Electronic control positioning support 8 of translation and rotation, positioning support 8 is fixed on rigidity workbench 11, this control system can realize 10nm translation precision controlling, to guarantee carefully to see the camera automatic track and localization shooting according to material deformation at any time, optical pickup image passes in computing machine by data line, this measuring system achieves and macroscopical optical measurement synchro control operation.
LVDT displacement transducer 15 and humidity temperature pickup 16 are placed in close test case 10 respectively, by pci data capture card, are delivered in computing machine by measured value.The measurement of macroscopic view optical camera, the measurement of thin sight optical camera, LVDT measurement, temperature humidity measurement, humid control, Loading Control all achieve Electronic Control, automatically collection analysis, wherein optical measurement and data acquisition adopt Labview software programming, and the control system that humid control and Loading Control carry with respective equipment.
Before carrying out this experimental test, need to process sample.First meticulous slicing two planes of symmetry centered by cylindrical sample is axial, and after polishing, place in closed mechanics-temperature, humidity cabinet, carry out different waterpower loading, utilize two different high definition cameras to carry out track up to institute's polished surface, and utilize digital image correlation technique to carry out image procossing.
Utilize this testing equipment to carry out wetting-drying test under 2MPa to mud stone, trial curve shows, this system can obtain different stress condition humidity change procedure, and material is from 100 μm to the strain value of 10 cm different scales, and its macroscopic view (cm) measuring accuracy is 10
-6, and foil gauge is measured more identical, thin sight (μm) measuring accuracy is 10
-4.Meanwhile, by this equipment, obtain mechanics parameter (modulus, intensity, Poisson ratio) under material different saturation, obtain material and carefully see variation characteristic, for ground Seepage-stress coupling deformation and damage Analysis on Mechanism provides test basis.
Claims (2)
1. the multiple dimensioned grand mesoscale experiments machine of rock-soil material multi-scenarios method, comprise rigid press (1), airtight transparent chamber (10), macroscopic view optical camera (4), thin sight optical camera (6), displacement transducer (15), humidity controller (12), humidity temperature pickup (16), control and acquisition system (17) and rigidity workbench (11), it is characterized in that: the moving piston (2) of rigid press (1) is through airtight transparent chamber (10) top, seal with plastics gum cover, the weighted base (3) of rigid press (1) is fixed on rigidity workbench (11) through airtight transparent chamber (10) bottom, with silica gel sealing, one end of displacement transducer (15) utilizes becket to be fixed on moving piston (2), other end metal plate is fixed on bottom weighted base (3), telescopic displacement measurement probe contacts with the metal plate be fixed on base weighted base (3), measuring sonde accompany movement piston (2) moves together, displacement transducer (15) is in airtight transparent chamber (10), airtight transparent chamber (10) is fixed on rigidity workbench (11) by support bar (9), macroscopic view optical camera (4) camera lens stretches into the interior side of airtight transparent chamber (10) by lens protection O-ring seal (5), the fuselage of macroscopic view optical camera (4) is fixed on rigidity workbench (11) by backstay (7), the optical amplifier camera lens of thin sight optical camera (6) stretches into the interior opposite side of airtight transparent chamber (10) by lens protection O-ring seal (5), the fuselage of thin sight optical camera (6) is fixed on rigidity workbench (11) by positioning support (8), macroscopic view optical camera (4) comprises macroscopical optical camera CCD imageing sensor, macroscopical optical camera optical lens, the regulation and control of macroscopical optical camera aperture and macroscopical optical camera fuselage, pixel is 1,600 ten thousand pixels, described macroscopical optical camera CCD imageing sensor physical size is 24x36mm, and described macroscopical optical camera optical lens and sample to be tested surface keep 24cm, thin sight optical camera (6) comprises thin sight optical camera CCD imageing sensor, camera optics enlarging lens is learned in thin sightseeing and camera body is learned in thin sightseeing, pixel is 4,000,000 pixels, described thin sight optical camera CCD imageing sensor physical size is 15x15mm, and it is 10 times of amplification optical lens that camera optics enlarging lens is learned in described thin sightseeing, described positioning support (8) x, y, z tri-directions can translation and rotation, passes through Electronic control, described displacement transducer (15), macroscopical optical camera (4), carefully see optical camera (6), humidity controller (12) and humidity temperature pickup (16) and control be connected with acquisition system (17).
2. according to the multiple dimensioned grand mesoscale experiments machine of a kind of rock-soil material multi-scenarios method described in claim 1, it is characterized in that: described airtight transparent chamber (10) is arranged moisture import (13) and damp exit (14), moisture import (13) is connected with humidity controller (12) with damp exit (14), and humidity temperature pickup (16) is gone up aperture through airtight transparent chamber (10) and is arranged in airtight transparent chamber (10).
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| CN106769511A (en) * | 2016-12-26 | 2017-05-31 | 大连理工大学 | Rock humidity, temperature, couple of force interflow changing environment pilot system |
| CN109187917A (en) * | 2018-07-19 | 2019-01-11 | 中国科学院武汉岩土力学研究所 | A kind of water-force coupling action 360 ° of full view test devices of lower rock and method |
| CN109269878A (en) * | 2018-11-09 | 2019-01-25 | 山东科技大学 | Temperature and humidity control device and its application method in Rock Mechanics Test loading procedure |
| CN110412243A (en) * | 2019-07-09 | 2019-11-05 | 衢州学院 | One kind being used for Factors on The Thermal Cracking of Rocks experimental provision |
| CN113758807B (en) * | 2021-09-27 | 2023-04-14 | 同济大学 | Cross-scale fractured rock mass hydraulic coupling visualization test method |
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