Triaxial test system for rock rheological perturbation effect

Rock rheological deformation easily occurs in the surrounding rock of deep soft rock tunnel,and is very sen- sitive to external perturbation effect. To study the law of deformation while rock under different rheological state and in- fluence of external perturbation effect,on the basis of the previous two models,the RRTS-III rock rheological perturba- tion effect triaxial test system is developed. The host provides a long-term stable axial pressure for the test,and uses the gear and hydraulic expansion structure,while the expansion ratio is 1 ∶ 100. The oil filled triaxial cell can provide a long-term stable confining pressure. The design principle of the chamber structure is based on oil gas separation. Hy- draulic pump can provide a maximum 50 MPa pressure,its accuracy is 0. 1MPa. The improved shock perturbation loading device has a high maneuverability. According to the principle of shock,the IEPE dynamic force sensor is de- signed,the range are 0-10 000 N,the sensitivity is 0. 497 mV / N. The sensor can accurately measure the size of single actual perturbation load,and it is equipped with automatic monitoring system,including load,displacement,strain and vibration of 4 data acquisition instrument and processing software. The triaxial test system for rock rheological perturba- tion effect is used to test the uniaxial rheological perturbation test and triaxial rheological test. The test procedure is simple,and the data is reliable.