Temperature and ice form effects on mechanical behaviors of ice-richmoraine soil of Tianmo valley nearby the Sichuan-Tibet Railway
文献类型：期刊论文
| 作者 | Li, Changdong2,3; Wang, Rui2; Gu, Dongming2; Wang, Jiao4; Chen, Xiaoqing4; Zhou, Jiaqing2,3; Liu, Zhenxing1 |
| 刊名 | ENGINEERING GEOLOGY
 |
| 出版日期 | 2022-08-01 |
| 卷号 | 305页码:11 |
| 关键词 | Moraine soil Triaxial testing Ice form Thermomechanical coupling Mechanical behavior Sichuan -Tibet Railway |
| ISSN号 | 0013-7952 |
| DOI | 10.1016/j.enggeo.2022.106713 |
| 通讯作者 | Li, Changdong(lichangdong@cug.edu.cn) |
| 英文摘要 | Moraine soils are widely distributed in the Qinghai-Tibet Plateau. With increased global warming, moraine soilrelated geohazards have become increasingly common, posing a serious threat to the infrastructure (e.g., the Sichuan-Tibet Railway) and inhabitants of this region. This paper aims to investigate the mechanical behavior of ice-rich moraine soil in the Tianmo Valley by conducting a series of triaxial constant strain rate (CSR) and coupled thermomechanical (CTM) tests on artificially moraine soil containing different ice forms (crushed ice and block ice). The results show that in general, compared to moraine soil containing crushed ice, moraine soil with block ice has a higher peak strength, a similar internal frictional angle and a considerably larger cohesive strength. The stress-strain curve of the soil containing crushed ice shows a strain-hardening form, while that of the soil containing block ice is represented by a strain-softening model similar to that of dense soil. In the CTM tests, it is revealed that the rising temperature could cause a sharp increase in strain and lead to sample failure, even when the axial load is far below the material's peak strength. A comparison between samples with different ice forms reveal that the soil containing crushed ice is more sensitive to temperature change. The tests demonstrate that the ice form has a significant influence on the mechanical behavior of moraine soil, and the temperature rise can result in a dramatic decrease in soil strength. Therefore, efforts should be made to detect the occurrence form of buried ice and the changes in the environmental temperature as well as the stress state of moraine soil slopes in situ. |
| WOS关键词 | SHEAR-STRENGTH ; DEBRIS FLOWS ; MORAINE ; COMPRESSION ; GLACIERS |
| 资助项目 | National Natural Science Foun[41941017] ; National Natural Science Foun[42090054] ; National Natural Science Foun[41922055] ; National Natural Science Foun[41931295] ; National Natural Science Foun[41902270] ; Key Research and Development Program of Hubei Province of China[2020BCB079] ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan)[CUGGC09] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000863098400002 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foun ; Key Research and Development Program of Hubei Province of China ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/185340]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Li, Changdong |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Land Surface Pattern & Simulat, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.China Univ Geosci, Fac Engn, Wuhan 430074, Peoples R China 3.China Univ Geosci, Badong Natl Observat & Res Stn Geohazards, Wuhan 430074, Peoples R China 4.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Surface Proc, Chengdu 610041, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Changdong,Wang, Rui,Gu, Dongming,et al. Temperature and ice form effects on mechanical behaviors of ice-richmoraine soil of Tianmo valley nearby the Sichuan-Tibet Railway[J]. ENGINEERING GEOLOGY,2022,305:11. |
| APA | Li, Changdong.,Wang, Rui.,Gu, Dongming.,Wang, Jiao.,Chen, Xiaoqing.,...&Liu, Zhenxing.(2022).Temperature and ice form effects on mechanical behaviors of ice-richmoraine soil of Tianmo valley nearby the Sichuan-Tibet Railway.ENGINEERING GEOLOGY,305,11. |
| MLA | Li, Changdong,et al."Temperature and ice form effects on mechanical behaviors of ice-richmoraine soil of Tianmo valley nearby the Sichuan-Tibet Railway".ENGINEERING GEOLOGY 305(2022):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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