HUANG Yaoguang, ZHANG Tianjun, LIU Penghui, LIANG Jingming, GUO Hailong, CHEN Zhiyun
It is known that the rock-grout-rock structural plane formed after the grouting of fractured rock is consolidated with strong shear mechanical properties, and its shear strength and stability are the key indicators to measure the effect of the grouting reinforcement. The advances in researches of the shear mechanical properties of fractured rock with the grouting reinforcement at home and abroad are reviewed from three aspects:(1) experimental study of shear mechanical properties of grouting-reinforced fractured rocks, including the shear strength, the stiffness and the creep; (2) theoretical prediction models for the shear strength of the grouting-reinforced fractured rocks, mainly, the theoretical calculation models and the empirical models; (3) numerical simulations of the shear deformation and the failure of the grouting-reinforced fractured rocks, including the finite difference method (FDM), the finite element method (FEM) and the discrete element method (DEM). Based on a summary of existing problems to be solved on the shear mechanical properties of the grouting reinforcement, it is proposed that the theory of the shear creep and the long-term stability of the grouting-reinforced fractured rocks should be a focus, especially, the general-purpose shear strength theory prediction model, to improve the shear strengthening theory and the reinforcement mechanism of the grouting reinforcement theory.
