饱和冻结黏土在常应变率下的单轴抗压强度  

Uniaxial compressive strength of saturated frozen clay at constant strain rate

作　　者：李海鹏[1] 林传年[2] 张俊兵[2] 朱元林[1] 

机构地区：[1]中国科学院兰州寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰州730000 [2]兰州大学资源环境学院,甘肃兰州730000

出　　处：《岩土工程学报》2004年第1期105-109,共5页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金资助项目(40171021);中科院寒旱所知识创新工程资助项目(CACX210053)

摘　　要：冻土作为一种复杂的多相介质,其强度受多方面因素的影响。通过三种不同干密度饱和冻结黏土在常应变率下的单轴抗压强度试验,得出了饱和冻结黏土的单轴抗压强度受温度、应变率、破坏时间及干密度等因素的影响规律,并分别建立了以温度、应变率(或破坏时间)及干密度为变量的强度预报方程。Uniaxial compressive strength tests were conducted on saturated frozen clay with different dry density at constant strain rate.Test results show that the compressive strength of frozen clay increases exponentially with decreasing temperature,increasing strain rate(or decreasing time to failure).The compressive strength of frozen clay also increases with increasing dry density in a certain range of dry density.The models for estimating the uniaxial compressive strength of frozen clay based on strain rate (or time to failure),temperature and dry density were presented.

关 键 词：饱和冻结黏土 单轴抗压强度 常应变率 应变率 干密度 

分 类 号：TU445[建筑科学—岩土工程]