原位岩体强度与初始应力状态的关系

RELATIONS BETWEEN IN SITU ROCK MASS STRENGTH AND PRIMARY EARTH STRESS CONDITION

阐述了岩体强度与应力状态的关系，明确指出岩体强度是空间位置的函数，应作为随机函数考虑．探讨了岩体抗剪强度参数与应力状态的相关性，给出了两者间的函数关系，并且以岩体稳定性分析为例，说明在工程实践中如何考虑应力状态对岩体抗剪强度参数的影响．

It is known that stress condition has an influence on rock mass strength. In practical rock engineering, however, rock mass strength within a unit of engineering geology is regarded as a random variable, having nothing to do with spatial position. Otherwise, the dependence of the parameters c,φ of shear strength, often used in projects, on stress condition will not be considered. In the article, the relation between rock mass strength and stress condition is expounded. The result shows that rock mass strength is the function with spatial position and can be treated as a stochastic function. Then, the relationship between shear strength parameters and stress condition is discussed giving their function. Finally, how to consider the influence stress on shear strength parameters is illustrated with rock masses stability analysis.