中文摘要：

冰水堆积体在西部地区广泛存在,具有高度的非均匀性与非连续性。与一般均质土体相比,冰水堆积体在力学行为上存在很大差异,而通常计算中也经常将这一特征忽略,由此造成了较大误差。以野外调查为基础,运用数字图像处理技术对典型冰水堆积体边坡处理后得到细观物理模型,并导入FLAC3D中采用强度折减法计算其安全系数。计算结果表明,受块石存在的影响,边坡内部的应力场分布“异常”,埋深对应力集中有明显的“放大效应”,潜在滑动面呈现多级发展,具有显著“绕石”特征。对比计算表明,冰水堆积体边坡的安全系数较均质边坡有较大提高。

英文摘要：

The glacial deposits exists extensively in the west, with high degree of nonuniformity and discontinuity. Contrast with the general homogeneous soil, there are many differences in mechanical behavior of glacial deposits, which are frequently ignored in in the general calculation and produced a large error. Based on the field investigation, the mesoseopic physical model of glacial deposits slope was obtained through digital image processing, which could be imported to FLAC3D and safety factor was figured out with strength reduction method. The results indicate that rock blocks make stress field of slope abnormal, and the burial depth has obvious magnifying effect on stress concentration. Meanwhile, there are multi-level sliding surfaces with obvious zigzag. By the way, the safety factor of glacial deposits slope has been much improved in the contrast.