高温–高含冰量冻土蠕变试验研究  

Experimental study on creep of warm and ice-rich frozen soil

作　　者：马小杰[1] 张建明[1] 常小晓[1] 郑波[1] 张明义[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室

出　　处：《岩土工程学报》2007年第6期848-852,共5页Chinese Journal of Geotechnical Engineering

基　　金：中国科学院寒区旱区环境与工程研究所创新工程资助项目(2004104);中国科学院知识创新工程重要方向资助项目(KZCX3-SW-351);中国科学院知识创新工程重大资助项目(KZCX1-SW-04);中国科学院国际合作重点项目(GJHZ0529)

摘　　要：为了研究高温–高含冰量冻土的蠕变特性,开展了温度分别为-0.3℃,-0.5℃,-1.0℃,含水率分别为40%,80%,120%的冻结黏土单轴压缩蠕变试验。试验结果表明,无论应力多大、作用时间多长,高温–高含冰量冻结黏土单轴压缩蠕变过程都具有衰减特征;在相同的温度条件下,在相同时刻、含水率40%时冻土强度最大,含水率120%时次之,含水率80%时最小;还得到高温–高含冰量冻结黏土单轴压缩蠕变方程、应力–应变关系和长期强度方程的参数。In order to study the creep characteristics of warm and ice-rich frozen soil, a series of uniaxial creep tests of frozen clay with water content of 40%, 80%, 120% at temperature of -0.3℃, -0.5℃, -1.0℃were conducted respectively. It was shown that the creep process of the warm and ice-rich frozen soil was always attenuate; at the same temperature and time, the strength of the frozen soil with 40% water content was the greatest, and that with 120% water content was greater than that with 80%..Furthermore, the parameters of the creep equation, long-term strength equation and relationship between stress and strain of the warm and ice-rich frozen soil were obtained.

关 键 词：高温-高含冰量冻土 蠕变方程 长期强度 应力-应变关系 

分 类 号：TU445[建筑科学—岩土工程]