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研究了层状岩体各向异性以及宏观力学参数分析方法,提出基于大型岩土分析软件ADINA各向异性材料模块,采用分区分级宏观力学参数模拟分析方法,结合“代表单元体”理论思想,对丹巴水电站二云片岩进行了各向异性模拟和宏观力学参数分析,研究得到丹巴片岩不同片理倾角宏观力学参数以及各向异性特征变化规律。研究结果显示,丹巴二云片岩尺度增加,平行片理向、垂直片理向变形模量x E、y E收敛幅度不同步,y E变化幅度随倾角增大而增大,收敛速率更高,水平向变形模量x E趋势较平缓,泊松比的变化规律恰好与之相反;随片理面倾角增大,丹巴二云片岩力学参数趋于极限值规律明显。
The anisotropy of stratigraphic rock mass and the method of macroscopic mechanical parameters analysis are studied. The ADINA anisotropic material module based on large geotechnical analysis software is proposed. The macroscopic mechanics parameter analysis method of subarea classification is proposed. Combining with the theory of “unit cell” , The anisotropy simulation and macroscopic mechanical parameter analysis of the two-cloud schist at Danba Hydropower Station were carried out. The macroscopic mechanical parameters and the anisotropic characteristics of the Danba schist at different Pilings were obtained. The results show that the scale of Danba 2 cloud-rock lithofacies is increased, the directions of the parallel slices are different, the convergence amplitudes of the deformation modulus x E and y E are not synchronous in the vertical slices, and the variation of y E increases with the increase of the tilt angle and the convergence rate is higher , The horizontal deformation modulus x E tends to be flat and the Poisson’s ratio changes in the opposite direction. With the increase of cleavage plane angle, the mechanical parameters of Danba 2 cloud lithic tend to have obvious laws.