裂隙岩体注浆加固效果的影响因素分析

Analysis of the Factors Influencing the Grouting Reinforcement Effects of Fractured Rockmass

岩体注浆加固是一个受多因素影响的复杂过程,它除了能有效提高裂隙岩体的整体稳定性外,还可以降低岩体的渗透性防止地下突水的发生。设计了包括单一斜节理、1组交叉斜节理、1组平行斜节理和2组交叉(平行)斜节理在内的4种混凝土胶结试样,通过模型实验和数值模拟,分析了影响裂隙岩体注浆加固效果的几种因素。模型试验和数值模拟结果表明裂隙岩体的加固效果和裂隙分布状态、连通率以及岩体本身的破碎程度有关。

Rockmass grouting reinforcement, a complex process affected by various factors, can not only improve the overall stability of fractured rockmass but also reduce the rockmass permeability so as to prevent underground water inrush. Four kinds of cement concrete specimen were designed, including the single oblique joint, a group of cross-oblique joints, a group of parallel joints and double oblique cross （parallel）joints, and the influencing factors of fractured roekmass were studied through model test and numerical simulation. The results indicate that the effects of grouting reinforcement of fractured rockmass are related to the fracture distribution, connectivity rates and fragmentation degree of rockmass.