破裂岩石注浆固结体的剪切力学性能研究进展

 破裂岩石注浆固结后形成的岩-浆-岩结构面呈现较强的剪切力学特性，且其剪切强度及稳定性是衡量注浆加固效果的关键性指标。基于科学研究的常用方法，从3方面阐述了国内外破裂岩石注浆固结体的剪切力学性能的研究进展：注浆固结体剪切力学性能试验研究，包括剪切强度、刚度及蠕变等性能；注浆固结体剪切强度预测模型研究，主要为理论计算模型和经验模型；注浆固结体剪切变形破坏数值研究，涉及有限差分法、有限单元法和离散单元法等。总结分析了目前破裂岩石注浆固结体剪切力学性能研究存在的主要问题，提出应加强注浆固结体的剪切蠕变性能、长期稳定性以及具有普适性的剪切强度预测模型的研究，以完善注浆加固机理和注浆加固强度强化理论。

Advances in shear mechanical properties of grouting-reinforced bodies for fractured rock

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.