岩体抗剪强度参数的线性优化方法

针对岩体结构面力学参数的重要性,以大量工程实例为依据,以统计误差分析相关理论为基础,研究最小二乘法与M-估计法在分析结构面抗剪强度参数时的适用性。研究结果表明,在难以判断粗差的数量和比例时,很难对两种线性回归方法的优劣进行规律性的比较。考虑到数据是具有工程特性的,为更准确地处理实验数据,在以上两种方法的基础上提出了一种新的实验数据处理方法,并应用于计算李家河水库的抗剪强度参数。

Linear optimization method for shear strength parameters of rock mass

In light of the importance of study of mechanical parameters of rock mass structural plane, based on a large number of practical projects and the basic statistical principle about error analysis, the applicabilities of least square method and M - estimation method for calculating the structural plane shear strength parameters, are studied. The results show that, when the gross errors are uncertain, it is hard to find the regularity that the two methods are more suitable for some certain condition. Because the data all have the given engineering characteristics, in order to make results more accurate, a new method based on the above two methods is proposed; and it is applied to calculate shear strength parameters of Lijiahe reservoir.