岩体强度的尺寸效应和均质效应

Size and Heterogeneity Effects on Strength of Rock Mass

为了实现岩体和标准岩样强度之间的工程变换,采用实验室试验和数值试验方法,参照以往的试验结果,研究了岩体强度的尺寸效应和均质效应,得出了同时考虑两种效应的用于计算岩体单向抗压强度的计算式。结果表明:岩体宏观强度可由基于Weibull分布的岩块强度和均质度很好的近似,并遵循两者的衰减规律。

For the conversion of strength from rock mass to rock sample, experimental and numerical tests are used to study the size heterogeneity effect of the rock mass, referring to lhe former results. Formula, with two effects considered, for the uniaxial compressive is obtained. From this formula, the maeroseopical strength of rock mass can be calculated from the strength and heterogeneity of rock sample and follows the attenuating laws of them,based on Weibull distribution.