Experimental study on variability in mechanical properties of a frozen sand as determined in triaxial compression tests
文献类型：期刊论文
| 作者 | Ma, Ling1,2; Qi, Jilin3; Yu, Fan1; Yao, Xiaoliang1 |
| 刊名 | ACTA GEOTECHNICA
 |
| 出版日期 | 2016-02-01 |
| 卷号 | 11期号:1页码:61-70 |
| 关键词 | Frozen sand Scattering Statistical analysis Triaxial compression Uncertainty Variability |
| ISSN号 | 1861-1125 |
| DOI | 10.1007/s11440-015-0391-y |
| 通讯作者 | Qi, Jilin(jilinqi@bucea.edu.cn) |
| 英文摘要 | Large uncertainty exists in soil testing due to the randomness in sampling and system errors, especially in tests on frozen soils. In order to reduce the randomness and improve the test accuracy, the sample preparation method is improved to obtain more homogeneous samples. The standard Chinese sand is used as the soil. An environmental material test apparatus with three-point temperature control was used. Four temperatures and four confining pressures are used for the triaxial compression tests, which makes 16 combinations. For each combination, five repeat tests were carried out to examine the scattering of the mechanical properties of the frozen sand. It is found that under a certain confining pressure, the scattering increased with the increase in temperature and vice versa. Under a certain combination of temperature at -0.5 A degrees C and confining pressure of 10 MPa, the stress-strain curves are so different that similarity in the curves does not exist. This phenomenon is not scattering because sample randomness or system errors cannot explain it any more and is therefore called variability. It is attributed to pressure melting, pressure crush of soil particles as well as severe phase changes caused by small temperature variations. The difference in the test results is considered as an inherent feature of frozen soils. Strength and strain energy are used, along with temperature and confining pressure to analyze the cause of variability. This work shows that further work must be carried out to develop an optimum testing program in order to make a reasonable analysis for engineering constructions in which frozen soils are involved. |
| 收录类别 | SCI |
| WOS关键词 | DAMAGE CONSTITUTIVE MODEL ; STRENGTH ; CRITERION ; BEHAVIOR ; PRESSURE ; CLAY |
| WOS研究方向 | Engineering |
| WOS类目 | Engineering, Geological |
| 语种 | 英语 |
| WOS记录号 | WOS:000368684700005 |
| 出版者 | SPRINGER HEIDELBERG |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2557111 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Qi, Jilin |
| 作者单位 | 1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Beijing Univ Architecture & Civil Engn, Sch Civil & Transportat Engn, Beijing 100044, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Ling,Qi, Jilin,Yu, Fan,et al. Experimental study on variability in mechanical properties of a frozen sand as determined in triaxial compression tests[J]. ACTA GEOTECHNICA,2016,11(1):61-70. |
| APA | Ma, Ling,Qi, Jilin,Yu, Fan,&Yao, Xiaoliang.(2016).Experimental study on variability in mechanical properties of a frozen sand as determined in triaxial compression tests.ACTA GEOTECHNICA,11(1),61-70. |
| MLA | Ma, Ling,et al."Experimental study on variability in mechanical properties of a frozen sand as determined in triaxial compression tests".ACTA GEOTECHNICA 11.1(2016):61-70. |
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来源：寒区旱区环境与工程研究所
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