Novel three-dimensional digital soft rock mechanical test system
A soft rock mechanics and test system technology, applied in the direction of applying stable tension/pressure to test material strength, scientific instruments, measuring devices, etc., can solve the problem of inability to provide a visual loading environment, inability to complete three-dimensional image construction of soft rock deformation process, The large deformation of soft rock cannot be well described, etc.
Pending Publication Date: 2021-05-07
SUN YAT SEN UNIV
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Problems solved by technology
[0005] (1) The confining pressure system of the traditional hard rock triaxial test system adopts oil pressure loading, and the hydraulic-mechanical coupling occurrence conditions of soft rock cannot be simulated with oil as the medium, and the oil is not completely transparent, so visual loading cannot be realized
[0006] (2) The displacement sensor of the traditional hard rock loading system can only measure the average axial displacement and lateral displacement, but cannot measure the full-field strain, and cannot describe the large deformation of soft rock well
[0007] (3) The loading chamber of the traditional hard rock loading system is a sealed high-strength hollow cylindrical cavity, which cannot provide a visual loading environment and cannot complete the three-dimensional image construction of the soft rock deformation process
Method used
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[0026] Further description will be made below in conjunction with the accompanying drawings.
[0027] Step 1: First create evenly distributed speckles on the soft rock, see figure 1 .
[0028] Step 2: Press the four groups of high-definition cameras figure 1 The sequence shown is arranged around the loading chamber, the distance and focus of the cameras are adjusted, the position is calibrated with the calibration plate, and after a series of leveling corrections, the computer algorithm can identify and correlate each group of cameras.
[0029] Step 3: Connect the power supply of the confining pressure loading system, the axial pressure loading system and the oil pump.
[0030] Step 4: Control the lifting of the loading chamber through the oil pump to separate the base 15 of the loading chamber from the bottom cover 6 .
[0031] Step 5: Wrap the transparent latex sleeve 5 on the soft rock 10, place the soft rock on the bearing head 11 and adjust the position of the sample t...
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The invention relates to a novel three-dimensional digital soft rock mechanical test system, and belongs to the field of rock mechanical testing. The system is composed of a soft rock visual loading system and a three-dimensional digital imaging system; conventional triaxial tests of different confining pressures of a soft rock under a water-endowed condition can be achieved, meanwhile, the full-field mesoscopic strain of the soft rock is measured, and a three-dimensional graph is constructed. With the method adopted, the measurement and three-dimensional digital construction of the full-field mesoscopic strain of the soft rock are achieved, and the large deformation characteristics of the soft rock can be researched more comprehensively; and a scheme for applying the digital imaging system to the indoor triaxial test is provided.
Description
technical field [0001] The test device and method relate to soft rock laboratory test mesoscopic strain measurement technology, more specifically relate to a three-dimensional digital soft rock mechanics test system, belonging to the field of rock mechanics test. [0002] technical background [0003] More and more engineering problems show that soft rock is the main influencing factor of many geological disasters such as landslides, landslides, and soil erosion. The area where soft rock occurs is often poor in rock mass and rich in water. The strength of soft rock itself is lower than that of hard rock, and it will disintegrate rapidly under the influence of water and weathering, resulting in further deterioration of rock mass conditions. There are a large number of red-bed soft rocks in South China. Red-bed soft rocks are rich in clay minerals and have well-developed pores and fissures. They show strong water disasters, which brings great challenges to the construction of ...
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IPC IPC(8): G01N3/12G01N3/06
CPCG01N3/06G01N3/068G01N3/12G01N2203/0003G01N2203/0019G01N2203/0048G01N2203/0075G01N2203/0256G01N2203/0641G01N2203/0676G01N2203/0682
Inventor 周翠英夏昌刘镇
Owner SUN YAT SEN UNIV