中文摘要：

宏有大规模和复杂结构的作文的特征的材料的机械性质能通过它的重建的中央结构被分析。在这个工作，广泛地在在中国的西南设计的水力发出的电力存在的距骨存款的中央结构是首先由小粒子重建了根据在原处基于处理的自我适应的 PCNN 数字图象拍摄，然后数字直接砍测试为学习距骨存款的机械性质被执行。因为处理的自我适应的 PCNN 数字图象在土壤岩石分割的细节有更高的辨别，结果显示距骨存款的重建的中央结构与实际状况更一致。存在和岩石块的随机的分发做起始砍僵硬，山峰力量和有粒子的纯土壤的比那些高的剩余力量显然缩放不到 1.25 厘米，但是减少要求的排水量因为到达它的山峰的距骨存款砍力量。岩石比例的增加在距骨沉积物的内部磨擦角度引起重要改进，它导致特征到某个度砍从塑料有一个变化趋势的压力排水量曲线尽力弄软变丑到变硬的非线性的紧张变丑，当时结合的不明显的增加。分布引起在内的岩石比例的差别的岩石的无常和异质砍地区，当运动岩石展示时，在shear 过程期间在山峰力量导致一个相对强壮的变化堵住例如翻译，旋转和十字路口，扩展范围砍地区，增加要求砍强迫，并且直接也导致判断错误更低砍力量与高岩石从样品被获得比例。然而，那就解释 shear 力量从室内的测试数据的小数量增加了的原因不与设计实践一致。

英文摘要：

The macro mechanical properties of materials with characteristics of large scale and complicated structural composition can be analyzed through its reconstructed meso-structures.In this work,the meso-structures of talus deposits that widely exist in the hydro-power engineering in the southwest of China were first reconstructed by small particles according to the in-situ photographs based on the self-adaptive PCNN digital image processing,and then numerical direct shear tests were carried out for studying the mechanical properties of talus deposits.Results indicate that the reconstructed meso-structures of talus deposits are more consistent with the actual situation because the self-adaptive PCNN digital image processing has a higher discrimination in the details of soil-rock segmentation.The existence and random distribution of rock blocks make the initial shear stiffness,the peak strength and the residual strength higher than those of the ＂pure soil＂ with particle size less than 1.25 cm apparently,but reduce the displacements required for the talus deposits reaching its peak shear strength.The increase of rock proportion causes a significant improvement in the internal friction angle of talus deposit,which to a certain degree leads to the characteristics of shear stress-displacement curves having a changing trend from the plastic strain softening deformation to the nonlinear strain hardening deformation,while an unconspicuous increase in cohesion.The uncertainty and heterogeneity of rock distributions cause the differences of rock proportion within shear zone,leading to a relatively strong fluctuation in peak strengths during the shear process,while movement features of rock blocks,such as translation,rotation and crossing,expand the scope of shear zone,increase the required shear force,and also directly lead to the misjudgment that the lower shear strength is obtained from the samples with high rock proportion.That,however,just explains the reason why the shear strength gained from a small amount of indoor