无充填硬性岩体结构面抗剪强度估算方法及应用

摘要

The shear strength parameters of rock mass discontinuity are basic parameters in anti-sliding stability calculation of structure foundation. In small-scale project, the value of the parameter is taken by the experienced engineer through the analy-sis and classification of the characteristics of discontinuity;while, in large-type project, it is obtained by test. The former meth-od depends on the experience of engineer, and the latter can not cover all discontinuities because the test can only be performed to partial typical discontinuity. We described how to estimate the shear strength parameters of some specific discontinuities quan-titatively, and the method is practical and convenient.%岩体结构面抗剪强度参数是进行结构地基抗滑稳定计算的基本参数。通常，对于小型工程均是由有经验的地质工程师通过对各结构面的性质进行分析后，参照类比经验取值；而对于大型工程都是通过试验获得参数值。类比取值完全取决于地质工程师的工程经验，试验只能对部分代表性结构面进行，不可能包含所有具体结构面。而将裂隙面的粗糙度和结构面的岩壁强度综合考虑，能弥补两种方法的不足，可在现场方便快捷地估算出岩体结构面的抗剪强度。通过工程实例介绍了该方法在现场的具体运用，可供工程技术人员借鉴。