基于层次分析法的炉霍地震滑坡触发因素分析

1973年炉霍县发生的7.9级地震造成了179个滑坡,基于这179个地震滑坡,利用统计的方法分析了触发炉霍县地震滑坡的6个主要因素为:地层岩性、地质构造、水文条件、临空条件、地形地貌和海拔高程,并用层次分析法的3种计算方法(几何平均法、算术平均法、特征向量法)综合分析这6个因素影响炉霍地震滑坡发生的重要程度。结果显示:地质构造因素是最为重要的因素,高出了排在第二的地形地貌因素的1.7倍;再其次是水文条件、地层岩性、临空条件,最次为海拔高程。

The Influencing Factors Analysis of Earthquake Landslidesof Luhuo Based on Analytic Hierarchy Process

In 1973,7.9 earthquake occurred in Luhuo county China caused 179 landslides.Based on the 179 earthquake landslides by using statistical method,this article makes an analysis of the six main factors:that triggered landslides Luhuo county earthquake:lithology,tectonics,hydrological conditions,spatial superiority,the type of landform and the altitude.The article also takes three algorithms of (geometric mean method arithmetic mean method,eigenvector method) by using analytic hierarchy process to make comprehensive analysis of the importance to Luhuo earthquake landslide by six factors.This study results show that:the most important factor is tectonics,which is 1.7 times higher than the second topography factor.Then followed by the hydrological conditions,lithology,spatial superiority,and the last one is the altitude.