基于模糊数学和Geo-Studio的滑坡稳定性综合评价

在滑坡的稳定性评价中一般均存在不确定因素,如力学参数的选取、滑坡影响因素以及主断面的选择等,通常单一方法很难综合考虑这些因素。本文在对三峡库区某滑坡体地质及工程地质条件系统分析基础上,采用模糊数学综合评价对其稳定性进行了分析,考虑模糊数学方法中的隶属函数以及权重确定具有主观性特点,是一种半定量-定性评价。因此,采用Geo-Studio数值模拟软件对其进行稳定性定量分析。综合研究结果表明:采用模糊数学方法评价且根据最大隶属度原则,得出该滑坡处于欠稳定状态;数值模拟表明该滑坡在天然状况下稳定性系数最大,处于欠稳定状态,降雨和地震状况下的稳定性系数均会降低。两种方法得到的结果具有一致性,并与现场勘查的工程实际相吻合,表明这两种评价方法的综合运用更加合理可行。

Based on the fuzzy mathematics and Geo-Studio comprehensive evaluation of the stability of the landslide

In landslide stability evaluation, generally there are uncertain factors, such as the selection of mechanical parameters, landslide influencing factors and the main cross section selection, etc, usually a single method is difficult to comprehensive consideration of these factors .In this paper, in a landslide in the three gorges reservoir area based on the geological and engineering geological conditions of system analysis, using fuzzy mathematics comprehensive evaluation for analyzing its stability, considering membership function in fuzzy mathematics method and the weight of determining with subjectivity, it is a kind of half quantitative and qualitative evaluation. Therefore, using Geo-studio numerical simulation software for quantitative analysis on the stability. The comprehensive research results show that the fuzzy mathematics method to evaluate and according to the maximum membership degree principle, it is concluded that the landslide is in unstable state. The numerical simulation shows that the stability coefficient of landslide is the largest under natural condition, it is in unstable state, the stability coefficient will decrease under the condition of rainfall and earthquake. The results of these two methods are in line with the engineering practice, suggests that the integrated use of evaluation methods is more reasonable and practical.