数量化理论Ⅲ在川东红层岩质滑坡研究中的应用

A Study of Rock Mass Landslide in Red Rock Area of East Sichuan Province Based on Third Theory of Quantification

[目的]揭示川东红层岩质滑坡稳定性的影响因素,为该地区滑坡的防治提供理论依据。[方法]基于对川东红层地区的滑坡综合调查,利用数量化理论Ⅲ对该地区滑坡的影响因素及其耦合作用进行分析。[结果]川东地区滑坡的主要作用因素为岩层倾角、滑坡高度及临空面高度,次要作用因素为土地利用情况及岩层组合关系,而一般作用因素是外营力及人类工程活动和岩层时代;确定出年降雨量、侏罗纪时代岩层、小于50m的滑坡高度、岩层倾角在5°~15°之间、厚层砂岩或泥岩夹薄层泥岩或砂岩、临空面高度在5~15m之间、土地旱地利用及河流冲刷及人类工程活动的主控影响因素。[结论]在不同滑坡样品中,不同因素的耦合强度具有一定的差异。经对比分析结果与现场调查的可靠性验证,证明了该方法的有效性。

[Objective]The influencing factors of landslide were explored in red rock area of East Sichuan Province in order to provide a theoretical basis for the prevention and control of landslide in this area.[Methods]A comprehensive survey related with landslide was carried out in red rock area of East Sichuan Province,influential factors of landslide and their coupling intensities were analyzed using the third theory of quantification.[Results]The first contributing factor of landslide in red rock area of East Sichuan Province are strata dip,landslide height and the free surface height.The second contributing factors are land use situation and rock composition relationships.The third factors are outside forces and human engineering activities and rock era.The main control factors include annual rainfall,Jurassic era rock,less than 50 mlandslide height,rock inclination between 5°~15°,thick sandstone or mudstone with thin mudstone or sandstone,free surface height between 5~15m,dryland land use and river erosion and human activity.[Conclusion]In different landslide samples,though the coupling strengths of different factors were different,they were verified in comparison with field investigations.Therefore,the validity of the method is proved.