College of Safety Engineering,North China Institute of Science and Technology,Beijing　 101601,China

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.

WANG Bo,GAO Changyan,CHEN Xuexi,et al. Triaxial test system for rock rheological perturbation effect[J]. Journal of China Coal Soci- ety,2018,43(2):433-440.