Mechanical properties of a silty clay subjected to freezing-thawing

被引：102
作者：
Cui, Zhen-Dong [1 ]
He, Peng-Peng [1 ]
Yang, Wei-Hao [1 ]
机构：
[1] China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Sch Mech & Civil Engn, Xuzhou 221116, Jiangsu, Peoples R China
来源：
COLD REGIONS SCIENCE AND TECHNOLOGY | 2014年 / 98卷
基金：
中国国家自然科学基金;
关键词：
Freezing and thawing; Laboratory test; Constitutive relationship; Silty clay; Microstructure; LOADING EXPERIMENTAL-EVIDENCE; COLD REGIONS; SOIL; MICROSTRUCTURE; BEHAVIOR; TUNNELS; CYCLES; FROST; MODEL;
D O I：
10.1016/j.coldregions.2013.10.009
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The structure of soil will change a lot after freezing and thawing. The mechanical properties and the microstructures are quite different from those of the undisturbed soil. Based on the static triaxial tests and dynamic triaxial tests, this paper studied the mechanical characteristics of a silty clay and quantitatively analyzed the scanning electron microscopy (SEM) images of the silty clay before and after freezing and thawing. According to the static triaxial test and the disturbed state concept (DSC), the constitutive relationship of the thawing soil was investigated. The dynamic triaxial tests were conducted to study the dynamic constitutive relationship of the thawing soil and the mechanical parameters were compared with those of the undisturbed soil. The parameters of the microstructures of silty clay were extracted to analyze the influences of the freezing and thawing on silty soil. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：26 / 34
页数：9
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