基于GH-B强度准则的节理岩质边坡稳定性分析

在岩质边坡工程数值模拟计算分析中,其难题之一就是如何较准确地确定岩体强度参数,而边坡岩体抗剪强度是影响计算分析成果的控制因素,也是支护设计成败的关键所在。采用GH-B强度准则对深水河大桥4号桥墩边坡进行了稳定性分析,同时与采用M-C强度准则的模拟结果进行了对比分析。结果表明:GH-B强度准则采用基于应力水平的塑性流动法则,更好地体现了节理岩体的变形和破坏机理,可有效反映岩体的非线性破坏特征,更加接近于工程实际,适于节理岩体的强度计算及稳定性分析。

Rock Slope Stability Analysis Based on General Hoek-Brown Strength Criterion

In the rock slope engineering numerical simulation analysis,one problem is how to accurately determine rock mass strength parameters,for the rock mass shear strength of slope is the controlling factor that influences the calculation and analysis of the results and it is also the key to the success of supporting design.Therefore,the general Hoek-Brown rock mass strength criterion is used to make the stability analysis for the slope of No.4 Pier of Shenshuihe Bridge;at the same time,Mohr-Coulomb strength criterion is also used for the slope stability analysis in a comparative way.The results indicate that the general Hoek-Brown criterion can better reflect the deformation and destruction mechanism of rock mass and,therefore,are suitable for the strength calculation and stability analysis of rock mass.