Hoek-Brown强度准则在高应力场判别中的应用

Application of the Hoek-Brown Strength Criterion to High Stress Field Criterion

确定围岩初始应力场的状态是岩土工程设计与施工的关键技术。利用Hoek-Brown强度准则估算岩体力学指标,分析处于破坏极限平衡状态的岩体强度与岩体中最大主应力在不同摩擦系数下的关系,提出估算岩体强度的方法和高应力场判定的标准。将该高应力场的判定方法应用于具体的工程实例,发现该方法评价效果良好,可较为快速、准确的分析围岩初始应力状态,同时为工程设计与施工提供可靠的依据。

Determining the state of primary stress field of surrounding rock is the key technology of geotechnical engineering design and construction. According to the relationship between rock mass strength which is in a limit equilibrium state of destruction under different friction coefficients,and the maximum principal stress in rock mass.This paper proposed a method for estimating the strength of rock masses and a criterion for determining the criterion about the high stress field by Hoek-Brown strength criterion. By applying to the specific engineering instance,it is proven that this method can be used to analyze the primary stress state of the surrounding rock quickly and accurately,which can provide a reliable basis for engineering design and construction.