金坪子滑坡Ⅱ区千枚岩碎屑土滑带土工程特性研究  

Research on Engineering Characteristics of Phyllite Clastic Soil from Sliding Soil

作　　者：赵静[1] 党凯 胡维炜 陈怡[4] 

机构地区：[1]西安理工大学,陕西西安710048 [2]重庆电力建设总公司,重庆400060 [3]中煤陕西中安项目管理有限责任公司,陕西西安710054 [4]桂林电子科技大学建筑与交通工程学院,广西桂林541004

出　　处：《水利与建筑工程学报》2013年第1期40-43,共4页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金项目(50879069);水利部公益性行业科研专项(201201053-03);陕西省黄土力学与工程重点实验室重点科研计划项目(09JS103)

摘　　要：通过对金坪子滑坡Ⅱ区千枚岩碎屑土滑带土的室内试验,分析含水率对滑带土剪切强度的影响规律。这对研究滑带土的工程特性,分析滑坡及滑动带的强度具有重要意义。研究表明:该滑带土伊利石含量较高,强度受水影响较大;三轴剪切破坏后没有明显的剪切面;应力应变曲线总体上表现为硬化型,且呈现出明显的非线性;滑带土粘聚力c和内摩擦角φ与含水率均成线性关系,随着含水率的增大,粘聚力c和内摩擦角φ都是是线性减小的,并通过线性回归计算得出了抗剪强度随含水率的线性关系式。By testing the phyllite clastic soil from the sliding soil at Jinpingzi Sliding Zone Ⅱ , the effect of moisture con- tent on sliding soil＇ s shear strength is studied. The results are of great significance to study the engineering characteristics of sliding soil and analyze the strength of landslide and sliding area. The research results show that this sliding soil has the high content of illite, its shear strength is highly affected by water, there is no clear shear damage plane during triaxi- al test, and the stress-strain relation curves show hardening feature and nonlinear modulus. Both of the cohesive strength c and friction angle φare linearly correlated with the moisture content of sliding soil, and both of them are decreased with the increasing of moisture content. Then, the linear relation functions of shear strength and moisture content are de- rived by linear regression calculations.

关 键 词：千枚岩 滑带土 含水率 三轴试验 剪切强度 

分 类 号：TU441.2[建筑科学—岩土工程]