滑带土长期强度参数的衰减特性研究  

STUDY ON ATTENUATION CHARACTERISTICS OF LONG-TERM STRENGTH FOR LANDSLIDE SOIL

作　　者：程东幸[1] 刘大安[1] 丁恩保[1] 李学政[2] 戴谦训[2] 

机构地区：[1]中国科学院地质与地球物理研究所工程地质力学重点实验室,北京100029 [2]国家电力公司中南勘测设计研究院,湖南长沙410014

出　　处：《岩石力学与工程学报》2005年第A02期5827-5834,共8页Chinese Journal of Rock Mechanics and Engineering

基　　金：中国科学院知识创新项目(KZCX2–SW–134);国家重点基础研究发展规划(973)项目(2002CB412701)

摘　　要：以大量的滑带土强度参数变化例子为依据,从影响滑带土长期强度的因素,如滑带土的含水量、滑带土的粒度成分、滑带土密度、试验条件、滑带土的矿物和化学成分以及水质特性等分析入手,对结构面力学参数的衰减特征进行了动态分析。研究结果表明:工程年限内在综合考虑影响滑带土因素的基础上,对滑带土参数的衰减特性可进行半定量评价,其值一般不会低于饱和直剪试验低值。借鉴边坡稳定性评价的定性、定量方法,对滑带土力学参数在工程年限内的变化提出了动、静态的评估方法。经在广西龙滩水电站蠕变体B区应用,其可靠性都得到了很好验证。Based on various examples for the long-term strength of landslide soil, influential factors of the long-term strength of landslide soil, such as water content, granulometric composition, mineral density, testing condition, composition of mineral, chemical composition of landslide soil, and water quality, are considered to analyze the attenuation characteristics of mechanical parameters of structural plane. The results show that it is possible to evaluate the attenuation characteristics of landslide soil with semi-quantification method, and the parameter values are not. less than low values of saturation testing usually. It is feasible to use the dynamic and static evaluation method of slope stability to offer new dynamic and static methods to evaluate the mechanics parameter of landslide soil in the engineering working life. Through the application in the creep mass--B section of Longtan hydropower station, the reliability is proved to be successful.

关 键 词：边坡工程 滑带土 影响因素 长期强度 强度折减方法 

分 类 号：P642[天文地球—工程地质学]