Portable rock-soil mechanics real-time loading test device matched with industrial CT (Computed Tomography) machine

Abstract

The invention provides a portable rock-soil mechanics real-time loading test device matched with an industrial CT (Computed Tomography) machine, and belongs to the technical field of rock-soil mechanics tests. The portable rock-soil mechanics real-time loading test device comprises an axial pressure system, a confining pressure system and a physical quantity measuring system, wherein the axial pressure system comprises rigid stand columns, an upper cross beam, a lower cross beam, connecting nuts, a piston, a rigid dowel bar and a data lead; the confining pressure system comprises a pressure chamber, a pressurizing production pipe, a sample drain pipe, a pressurizing exhaust pipe, a water-permeable stone, an oil filler pipe, a supercharger, an oil tank, a water storage tank, an oil pipe valve, a pressurizing port valve, a water storage tank valve and an exhaust port valve; and the physical quantity measuring system comprises a pressure sensor, a load controller, a displacement sensor and a data lead. The three systems are arranged on a CT rotary table, and X rays are emitted from a radiation source, penetrate through the barrel wall of the pressure chamber and the sample, are received by a detector, and are transmitted to a computer for reconstruction of a fine sample image. By adopting the device, the problem concerned with visual and digital representation of the internal structural morphology of a rock-soil body sample in a loading deformation process is solved.

Description

technical field [0001] The invention relates to the technical field of rock-soil mechanics test, in particular to a portable rock-soil mechanics real-time loading test device matched with an industrial CT machine. Background technique [0002] Indoor triaxial test is the best way to study the deformation and failure mechanism of rock and soil under the action of stress. Various sensors arranged on the testing machine are used to obtain the stress-strain response reflecting the macroscopic mechanical properties of the sample, but it is impossible to know the inside of the sample. deformation and fracture mechanism. In view of the defects of the triaxial testing machine, the predecessors successively used three methods of electron microscopy, acoustic emission and X-ray CT to apply them to rock and soil testing. However, the scanning electron microscope is obviously affected by the effect of mineral particles, and can only observe the deformation of the sample surface in real...

AI Technical Summary

Problems solved by technology

The traditional CT loading device is mostly placed in the medical CT machine for scanning tests. However, the radiation energy of the medical X-ray CT machine is small (80-140Kev), and it cannot perform fine scanning on large-scale rock and soil samples. There are also great difficulties in the identification of evolution

In addition, traditional medical CT supporting loading equipment mostly uses alloy aluminum materials to make triaxial pressure chambers. Alloy aluminum materials have strong absorption of X-rays. In addition, X-rays used in medical CT have weak penetration and low resolution. As a result, it becomes very difficult to obtain the crack evolution law during the loading process of the sample

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