关键词: 各向异性, 宏观力学参数, 二云片岩, 代表单元体

Abstract: This paper studies the anisotropic mechanical characteristics of the layered rock mass and the analysis method of macro mechanical parameters. It proposes an anisotropic material modules on the basis of ADINA, uses the partition grading macro mechanical parameters simulation method, combining with the theoretical idea of representative unit to make an analysis of anisotropic mechanical simulation and macro mechanical parameters of the two-mica-quartz schist in Danba hydropower station. From the results, the different schistose angle parameters and variation rules of the anisotropic mechanical characteristics of Danba schist are obtained. The results show that with the increasing of two-mica-quartz schist in Danba, the convergence rates of parallel and vertical schistosity deformation modulus and are not synchronized, amplitude increases with the increase of angle, it has a higher convergence rate. The trend of horizontal deformation modulus is more gentle, the variation of Poisson's ratio is just the opposite; with the schistose angle increasing, the mechanical parameters of the two-mica-quartz schist in Danba tend to the limit value obviously.

Key words: anisotropy, macro mechanical parameters, two-mica-quartz schist, representative volume unit