基于因子分析法的滑坡变形分析  

Landslide Deformation Analysis Based on Factor Analysis

作　　者：张婷婷[1] 晏鄂川[1] 胡显明[1] 范彬彬[1] 

机构地区：[1]中国地质大学(武汉)工程学院,武汉430074

出　　处：《长江科学院院报》2012年第4期21-25,共5页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金资助项目(40672189);国家重点基础研究发展计划(973)项目(2011CB710605)

摘　　要：滑坡位移监测资料是我们认识滑坡的基本信息之一,但并非任何的滑坡监测资料都能够直观地反映出滑坡的变形特征,因此采用因子分析法对三峡库区某滑坡的位移监测资料进行分析,将滑坡监测点作为变量,找出了能够反映监测资料原始数据的3个公共因子,并求得了各公共因子的载荷矩阵。此外,根据因子载荷的分布及其监测点变量反映的信息确定了各公共因子的实际意义,得知库水是影响滑坡变形的主要因素,降雨次之,监测点所在微地貌形态对变形也具有一定的影响。同时,由因子载荷求出了库水因子作用下的位移量,并通过滑坡主剖面上中前部监测点的累积位移变化趋势,对该滑坡在库水作用下的变形机理进行了分析。Factor analysis is adopted to analyze the displacement monitoring data for a landslide in Three-Gorges Reservoir area.The monitoring points are used as variables,and three common factors are extracted to characterize the original data.Meanwhile,the loading matrix of common factors is obtained.Furthermore,according to the distribution of factor loadings and the information reflected by the monitoring point variables,the practical meaning of each common factor is determined.It＇s indicated that reservoir water is the biggest influencing factor causing landslide deformation,followed by precipitation and the microtopography of monitoring points.The value of displacement induced by reservoir water is obtained by factor loading.According to the changing trend of cumulative displacement of monitoring points on the middle and front of the landslide profile,the landslide deformation mechanism under the influence of reservoir water is analyzed.

关 键 词：因子分析 库水 降雨 累积位移 变形分析 

分 类 号：P642.22[天文地球—工程地质学]