论滑坡稳定性分析方法_李世海.doc

——————————————————————————————————————————————— 论滑坡稳定性分析方法_李世海 第28卷 增2 岩石力学与工程学报 Vol.28 Supp.2 2009年9月 Chinese Journal of Rock Mechanics and Engineering Sept.，2009 论滑坡稳定性分析方法 李世海，刘天苹，刘晓宇 (中国科学院 力学研究所，北京 100190) 摘要：以地质体的渐进、动态破坏为基本出发点，对滑坡的稳定性问题进行较为系统的讨论。通过具体滑坡现象 和模型试验说明研究滑坡问题的复杂性；按照山体的破坏程度，划分包括既有破坏、局部再破坏、贯穿性破坏、 离散性破坏和运动性破坏几种破坏形式，说明破坏类型的转化正是山体渐进破坏的过程；综合分析极限平衡法、 有限元法、离散元法分析边坡稳定性的局限性；详细介绍基于连续介质的离散元法的特点；建议将滑坡体地表裂 缝作为参数分析的基本参量；阐述分析运动性破坏的重要性；特别强调单纯靠计算方法不能解决工程问题，将计 算模型与现场监测结果分析相结合，是正确判断山体当前状态、分析滑坡稳定性的有效途径。 关键词：边坡工程；破坏形式；滑坡稳定性；极限平衡法；有限元法；离散元法；地表裂缝；监测结果 中图分类号：P 642.22 文献标识码：A 文章编号：1000–6915(2009)增2–3309–16 ANALYSIS METHOD FOR LANDSLIDE STABILITY LI Shihai，LIU Tianping，LIU Xiaoyu (Institute of Mechanics，Chinese Academy of Sciences，Beijing 100190，China) Abstract：Landslide stability is analyzed systematically based on progressive and dynamic failure of geological media. It is very complex to study the landslide according to specific phenomena and model tests. According to the damage degree of the mountains，the failure can be divided into several types，including intrinsic failure，partial re-failure, run-through failure，discrete failure and motive failure. The transition of the failure type is the process of the gradual failure of the mountains. The limitations of the limit equilibrium method，the finite element method and the discrete element method in analyzing the slope stability are analyzed comprehensively. The characteristics of the continuum-based discrete element method are introduced in detail. Landslide surface cracks should be considered as a basic parameter for analyzing landslide stability. The importance of study on motive failure is then described. It is specially emphasized that the engineering problems cannot be solved only leaning on the numerical simulation，and as a result，the effective appr