Experimental study on triaxial rheology property and constitutive model for sandstone

Triaxial compression rheology tests for the sandstone from Jinping II Hydropower Station on Yalong River are conducted in this paper.Based on the recorded data,the change laws of axial strain,lateral strain,axial strain rate and lateral strain rate with time under different stress levels are obtained.Then,by using the Burgers constitutive model,the transient and steady creep of the sandstone can be reflected,and the related parameters are identified.This study may provide theoretical basis for a...