剪切破坏模式下确定均质岩基极限承载力的两种方法

TWO METHODS FOR DETERMINING ULTIMATE BEARING CAPACITY OF ISOTROPIC ROCK FOUNDATION UNDER SHEAR FAILURE MODEL

剪切破坏是岩基中最常见的一种破坏模式 ,常发生在完整岩体、破碎岩体和软弱岩体等均质岩基中。本文基于岩体经验强度准则和极限平衡法 ,简单介绍了理论计算岩基极限承载力的Bell解法和Hoek -Brown解法 ,以及确定岩体参数m ,s,c,φ 的方法。最后 ,结合规范 ,以重庆某工程为例说明了本文方法。

Shear failure is a most common failure in rock foundation, which often takes place in intact , jointed and weak rock foundations. On the basis of Hoek-Brown strength criterion and limit equilibrium method, the authors introduce two methods for determining ultimate bearing capacity. Finally, an engineering example from chongqing is offered in order to prove the methods to be reliable.