人工冻结粘土单轴压缩蠕变特性归一化分析  

Normalized Analysis of Uniaxial Compressing Creep Test of Frozen Soil

作　　者：高广运[1] 张全胜[1] 李伟[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092

出　　处：《地下空间与工程学报》2005年第2期192-195,共4页Chinese Journal of Underground Space and Engineering

基　　金：上海市重点学科 (岩土 )资助项目

摘　　要：冻土的蠕变特性问题一直是冻土力学的一个重要研究方向,通过对安徽临涣矿区粘土冻结后,进行单轴压缩蠕变试验,用归一化的方法研究其蠕变特性。研究表明,随着加载应力的增大,破坏时间缩短,最小蠕变速率加快,特别当压力大于1 .3MPa时更为明显,破坏应变先增加后减小;加载条件相同时,冻结温度越低,破坏时间越长,最小蠕变速率越慢,- 1 0℃时破坏应变最大。Creep of frozen soil is an important branch of frozen soil mechanics. In this paper, the normalized method is used to study uniaxial compressing creep of frozen clay soil from Linhuan mine Anhui Province. Results show that, with the increase of compressive stress, failure time decreases, the minimal creep velocity increases, and failure strain increases first, then decreases. When compressive stress is settled, with temperature fall, the failure time increases, the minimal creep velocity decreases, and failure strain increases first, then decreases, and failure strain reaches peak value at the temperature of -10℃.

关 键 词：蠕变特性 单轴压缩 人工冻结粘土 归一化分析 破坏时间 蠕变速率 破坏应变 研究方向 冻土力学 蠕变试验 加载条件 冻结温度 最小 减小 

分 类 号：TU458.3[建筑科学—岩土工程] TS106.68[建筑科学—土工工程]