Dry-wet-freeze-thaw cycle environment simulation and damage and deterioration test device and method for rock sample

Abstract

The invention discloses a dry-wet-freeze-thaw cycle environment simulation and damage and deterioration test device and method for a rock sample. The device is characterized by comprising a vacuum pump, a gas pipeline, a water pump, a liquid pipeline and a temperature control box, wherein the rock sample is placed in a test sample chamber in the temperature control box; high-temperature-resistant radial and axial deformation sensors are respectively arranged in the radial direction and the axial direction of the rock sample; the vacuum pump is connected with the gas pipeline and is connected into the top of the test sample chamber; one end of the water pump is connected with the liquid pipeline and is connected into the bottom of the test sample chamber; a liquid level detector is arranged on a sealing cover body, and is placed in the test sample chamber; and a CT scanning device is arranged on the outer side of the test sample chamber. According to the dry-wet-freeze-thaw cycle environment simulation and damage and deterioration test device for the rock sample, a microcomputer program controller is used for controlling implementation of multi-time cycle simulation of complicated environments of normal temperature to high temperature drying, vacuum forced saturation, cooling freezing, heating defreezing and thawing and the like; a microcomputer is used for radial and axial strain data acquisition and recording; and a CT scanning system is used for testing damage and deterioration in a repeated dry-wet-freeze-thaw cycle process. The device has automatic and integrated features and is economical, environmentally-friendly, low in human intervention and high in test working efficiency.

Description

technical field [0001] The invention relates to the technical field of rock engineering, and relates to the preparation of freeze-thaw specimens of cracked rock masses under simulated complex environmental conditions and the testing technology and method for the damage and degradation process of physical and mechanical properties of rock samples in complex environments, in particular to a cycle drying of rock samples , Saturated freeze-thaw environment simulation and its damage degradation testing device and method. Background technique [0002] The rock and soil in the earth's crust has been subjected to weathering effects such as solar radiation and water (melting snow or ice) for a long time, which deteriorates the structure and mechanical properties of the rock and soil. Wet-dry cycle and freeze-thaw cycle are the two most typical weathering effects. The dry-wet cycle is a physical cycle process in which the rock-soil medium absorbs air moisture or atmospheric rainfall ...

AI Technical Summary

Problems solved by technology

[0010] The problem to be solved by the present invention is to provide equipment and methods for indoor research on the degradation of physical and mechanical properties of fractured rock mass affected by complex external environments, and to provide a simulation of rock sample cycle dry and wet freeze-thaw environment and its damage degradation test device and method

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