SOFTENING EFFECT OF PHYLLITE WITH WATER SATURATION
ZHAO Jianjun1, XIE Mingli1, LI Tao1, TAN Shengyu1,2, JU Nengpan1, BU Fan1
1. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection(Chengdu University of Technology), Chengdu 610059;
2. Sichuan Provincial Transport Department Highway Planning Survey, Design and Research Institute, Chengdu 610041
Water-rock interaction is a main factor that weakens the rock mass strength of reservoir bank slope. Weaken strength for phyllite is especially obvious physical reacting with water. Taking the phyllite of a slope as example, this paper designs conventional triaxial compression tests under different saturated conditions and studies strength change law with saturated time. Results are obtained as follows:(1)the interaction between phyllite and water is strong. The rock strength parameters gradually decrease with the increase of water saturation time. For the first 60 days, the rock mass parameters linearly decrease with saturated time and tend to stable at 70 days. The mechanism gradually evolves elastic deformation to plastic deformation.(2)Weaken law of parameters shows obvious heterogeneity. The weaken degree is first large and then small, and finally tends to be stable.(3)According to shear failure mode, rock saturation is a cumulative process that from micro to macro. To sum up, the results of this paper have a certain reference value for studying the change law of mechanical property for rock mass of reservoir bank slopes.