大型滑坡滑带土结构强度再生特征及其机理探讨  

Property and mechanism of restorration of structural strength of slide zone soil for a large scale Landslide

作　　者：任光明[1] 聂德新[1] 

机构地区：[1]成都理工学院工程地质研究所,成都610059

出　　处：《水文地质工程地质》1997年第3期28-31,44,共5页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金;工程地质力学开放实验室资助

摘　　要：大型滑坡滑带土强度参数的正确选取，是作好滑坡稳定性评价和抗滑工程设计的重要环节。本文在现场调研和室内试验基础上，揭示了只要具有一定滑体厚度的滑带土，沿滑面具有强度再生现象，尤其在抗剪强度参数中显著存在一定量值的结构强度。讨论了结构强度再生的条件、变化规律及其再生机理，论证了滑带上的残余强度仅仅是一种瞬时效应，为滑坡滑面强度参数的选取与评价提供了重要的理论依据。The shear strength of slide zone soil is an indispensable parameter for stability analysis and countermeasures of landslide. Based on the field investigation and in-lab tests, the phenomenon of the strength restoreation of slide zone soil under the action of gravitation of slide rockmass is illustrated, especially there is obviously a certain arnount of structural strength in the paramefer of shear strength. The conditions, variation properties and mechanism of structural strength restoration are discussed. It is proved fully that the residual strength of slide zone soil is only an instananeous effect. The study provides an important theory bosis for the evaluatlon of the strength parameter of slide zone soil.

关 键 词：滑坡 滑带土 结构强度 压应力 再生特征 

分 类 号：P642.22[天文地球—工程地质学] P642.116[天文地球—地质矿产勘探]