CAJ | 학술논문

汶川大地震，山体开裂，出现多处大型滑坡，产生了大量不稳定斜坡。这类不稳定结构随时可能引发新的灾难。本文以实验室模型数据和某地震后不稳定斜坡为例，分析了不稳定斜坡区二维高密度电阻率法反演的电断面异常特征。结果表明，沉积岩地区的不稳定斜坡体与滑床间存在明显的电性差异，根据地形改正后的不稳定斜坡区视电阻率异常剖面，更直观地显示了不稳定斜坡体的纵横向展布、主滑动面位置与埋深，圈定了不稳定斜坡体的规模，较准确地确定了高阻垂直电性异常体（裂缝、空洞、溶洞）的形状、埋深等，从而为不稳定斜坡的治理提供了可靠的地球物理依据。
문천대지진，산체개렬，출현다처대형활파，산생료대량불은정사파。저류불은정결구수시가능인발신적재난。본문이실험실모형수거화모지진후불은정사파위례，분석료불은정사파구이유고밀도전조솔법반연적전단면이상특정。결과표명，침적암지구적불은정사파체여활상간존재명현적전성차이，근거지형개정후적불은정사파구시전조솔이상부면，경직관지현시료불은정사파체적종횡향전포、주활동면위치여매심，권정료불은정사파체적규모，교준학지학정료고조수직전성이상체（렬봉、공동、용동）적형상、매심등，종이위불은정사파적치리제공료가고적지구물리의거。
Some serious landslides and crack in mountain can be find in Wenchuan Earthquake. This kind of unstable slopes can engender new disaster at any moment. In this paper, taking the laboratory model data and a unstable slope after earthquake as an example,the authors studied anomaly characteristics of the 2-D high density resistivity ratio inversion section chromatogram of unstable slope and obtain terrain correction for apparent resistivity section. The results show that, for unstable slope in sedimentary areas, there exist obvious electric difference between unstable slope and slide bed. The apparent resistivity profile chromatogram of unstable slope area show clearly and intuitively the vertical and lateral distribution of unstable slope and the position and depth of main sliding plane. Therefore,the size of unstable slope mass can be delineated. It ensures shape and burial depth of high resistance vertical resistivity anomaly （for example fissure, cavity and karsts cave）. All of these are the reliable geophysical basis for unstable slope control.