滑坡稳定性评价的方法及标准

滑坡稳定性评价是滑坡防治中的关键问题之一。评价结果确定滑坡治理与否。但目前工程技术人员所采用的滑坡稳定性评价方法各不相同,在定量分析评价标准方面各规范所考虑的程度和确定的标准也不尽统一。由此造成的评价结果各异,因此对其进行分析研究是十分必要的。文章以滑坡的工程地质环境为基础,分地貌形态、宏观地质条件、作用因素和滑动迹象定性分析评价及力学计算法定量分析评价介绍了滑坡稳定性综合评价方法,并结合现有规范中滑坡稳定系数与之对应的稳定状态各不一致的情况,分3个危害程度等级和正常、特殊2种荷载组合工况,分析确定了不同稳定状态下的稳定性评价标准。滑坡稳定性评价应按定性分析及定量分析2部分进行,之后将评价结果综合得出一致的综合评价结论。滑坡稳定性评价标准,应视其危害程度等级、荷载发生及组合几率而定。

Methods and standards of landslide stability evaluation

The landslide stability evaluation is one of the key problems in landslide prevention,and its evaluation result influences the landslide prevention.But at the present,the landslide stability evaluation methods adopted by the technical personnel are different,because the standard considered degree and determined standard in quantitative analysis and evaluation standard aspect are not unique,which may cause the evaluation results quite different,so it is necessary to carry out research on it.This paper,based on engineering geological environment of landslide,presents the comprehensive evaluation method from quantitative analysis evaluation and mechanical calculative qualitative analysis evaluation of geomorphic form,macro-geological condition,action elements and sliding sign.In this paper,owing to stability factors of landslide are not integrated with their correspondent stability states in the existing standard at the present,the author analyzes and determines stability evaluation standard under different stability states according to three dangerous degrees and two kinds of load combinations of normal and special conditions.Landslide stability evaluation should be carried out according to two steps of quantitative and quantitative analysis,then the evaluation results are comprehensively analysed and finally obtained the comprehensive result.The evaluation standard of landslide stability should be determined according to dangerous degrees and probability of load occurrence and combination.