原状网纹红土的蠕变特性及模型研究  

Study on the Creep Characteristics and Model of Reticulate Red Clay

作　　者：胡焕校[1] 魏涛[1] 晏露超[1] 唐喜青[1] 

机构地区：[1]中南大学地学与环境工程学院,湖南长沙410083

出　　处：《水资源与水工程学报》2010年第1期26-28,33,共4页Journal of Water Resources and Water Engineering

基　　金：湖南省自然科学基金(07JJ6087);武汉岩土力学研究所国家重点实验室开发课题:网纹红土的流变性研究(Z110702)

摘　　要：为了研究长江中下游地区广泛分布的原状网纹红土的蠕变特性,进行了不同围压下的三轴排水蠕变试验,在此基础上引入Singh-Mitchell蠕变方程,即应力-应变关系采用指数函数,应变-时间关系采用幂函数,建立了网纹红土的Singh-Mitchell蠕变模型。该模型较好地表达了土体的应力-应变-时间关系,且具有参数少、适用性强的特点。In order to research the creep behaviors of the undisturbed reticulate red clay widely distributed in areas on the lower-middle reaches of the Yangtze River,a series of laboratory drained triaxial creep tests under different ambient pressure were performed.Based on these tests,Singh-Mitchell＇s creep equation was introduced,exponential function was adopted for shear stress-strain behavior and a power function for strain-time behavior.The model expressed better the stress-strain-time relationship of soil body.It is easy to use and feasible for engineering practice.

关 键 词：网纹红土 蠕变 Singh-mitchell蠕变方程 应力-应变-时间关系 

分 类 号：TU411.3[建筑科学—岩土工程]