Rock seepage-stress-temperature-chemical coupled rheological testing device and method

Abstract

The invention discloses a rock seepage-stress-temperature-chemical coupling rheological testing device and method. A rock sample is arranged in a pressure chamber of a three-axis rheological testing device, and confining pressure is applied to the rock sample through a hydraulic system; the temperature in the pressure chamber is controlled through adjusting the temperature of hydraulic oil; two chemical solution storage chambers are used for flushing a chemical solution into the bottom and top of the rock sample respectively, and applying bottom osmotic pressure and top osmotic pressure to the rock sample; and after the confining pressure, the osmotic pressure, the temperature and the concentration of the chemical solution are stabilized, a three-axis rheological test is carried out. The temperature change and freezing and thawing cycle of the rock sample are realized through controlling the temperature of the hydraulic oil in the pressure chamber; the seepage of the chemical solution is realized by utilizing osmotic pressure difference between the bottom and the top of the rock sample, and the osmotic pressure of the chemical solutions with different concentrations can be realized; and through rock multi-field coupling rheological tests under different osmotic pressures, different stresses, different temperatures and different concentrations of chemical solutions, the rock seepage-stress-temperature-chemical coupling rheological testing device and method have reference values of quantitatively researching long-period stability problems under single or common effect of underground water, freezing and thawing cycle, chemical corrosion and stress on the rock.

Description

technical field [0001] The invention relates to the field of rock mechanics and engineering, in particular to a rock seepage-stress-temperature-chemical coupling rheological test device and a method thereof. Background technique [0002] The multi-field coupling problem of rock is an important research topic in rock mechanics at present, and has very important engineering background and significance. Many underground rock engineering, such as underground storage caverns, dam foundations, and underground water diversion tunnels, have coupling effects of multiple factors. The existence of groundwater usually leads to mutual coupling between water and rocks. At the same time, the chemical composition of seepage water is complex and diverse, which continuously erodes the interior of rocks. Freeze-thaw cycles also have a great impact on the destruction of rock materials. Therefore, it is necessary to carry out tests on the mechanical properties of rocks under seepage-stress-temp...

AI Technical Summary

Problems solved by technology

At present, the methods for conducting triaxial rheological mechanical properties tests of rocks are mature, but there are few methods for multi-field coupled rheological tests, and there is no single or joint action of different osmotic pressures, different temperatures, different stresses and different concentrations of chemical solutions. Test methods for stress, strain, permeability, temperature, and time evolution laws

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