Parallel-type rock temperature, seepage and stress coupling triaxial rheometer

Abstract

The invention relates to a parallel-type rock temperature, seepage and stress coupling triaxial rheometer which comprises a loading framework, wherein a plurality of triaxial pressure chambers are arranged in the loading framework; pressure heads of the triaxial pressure chambers are respectively connected with an axial pressure servo control system; the triaxial pressure chambers are connected with a confining pressure servo control system through oil pipes; samples in the triaxial pressure chambers are connected with a pore pressure servo control system through water pipes; electrical heating parts are arranged on the outer wall of the triaxial pressure chambers, and are connected with a temperature control system; the axial pressure servo control system, the confining pressure servo control system, the pore pressure servo control system and the temperature control system are all connected with a data acquisition and control system through electric circuits; the data acquisition and control system controls the stress field, the seepage field and the temperature field of the samples in real time, so as to measure the rheological deformation of the samples under different temperature, seepage and stress coupling conditions. The triaxial rheometer can be used for conducting a plurality of groups of rheological tests under different temperature, seepage and stress coupling conditions at the same time.

Description

technical field [0001] The invention relates to a parallel-connected rock temperature-seepage-stress coupled triaxial rheometer, which belongs to the technical field of underground engineering and geotechnical engineering test instruments. This equipment can carry out multiple sets of rheological tests under different temperature-seepage-stress coupling conditions at the same time, and is suitable for the study of long-term mechanical properties of rock and soil media under temperature-seepage-stress coupling conditions. Background technique [0002] In engineering constructions such as underground storage of oil and liquefied natural gas, development of geothermal resources, exploitation of deep resources, and geological disposal of high-level radioactive waste, there are coupling problems of multiple fields and phases. The long-term stability of engineering rock mass has a very important impact, and has been valued and concerned by researchers at home and abroad. Among th...

AI Technical Summary

Problems solved by technology

Its disadvantage is that it can only provide stress loading, and the two pressure chambers are set up and down in series, sharing a set of axial pressure system, which is easy to cause large friction, and the two sets of triaxial rheological tests must be set to the same axial pressure

The patent application No. 2009100782332 discloses "a five-link rock uniaxial rheometer", which solves the problem of "only a single specimen can be loaded for each test", and the technical means used include "servo loading system It includes five sets of parallel loading bodies, and each set of loading bodies is composed of an upper pressure plate, a lower pressure plate, a precision screw, a lift, a servo motor, a manual regulating valve, and a test piece mounting ball seat.” This parallel device can Improve the shortcomings of the series test device on the basis of ensuring the improvement of test efficiency, but still do not break through the limitations of simple stress loading of traditional rheometers

The patent application number 201410734403 discloses "Triaxial Stress, Seepage, and Chemical Coupling Rheology Test System with CT Real-time Scanning", and the technical means adopted are "the triaxial pressure chamber of the invented test system is small in size, which solves the problem of the current triaxial The size of the pressure chamber is large; and three closed-loop servo metering pumps are used to accurately control the confining pressure, axial pressure and osmotic pressure respectively.” The disadvantage is that this invention can only realize the stress-seepage-chemical coupling rheological problem, and cannot use temperature - The loading form of seepage-stress coupling, the test results cannot reflect the rheological properties of rock-soil media under different temperature-seepage-stress coupling conditions

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