Influences of soil moisture and salt content on loess shear strength in the Xining Basin, northeastern Qinghai-Tibet Plateau
文献类型：期刊论文
| 作者 | Fu, Jiang-tao; Hu, Xia-song; Li, Xi-lai; Yu, Dong-mei; Liu, Ya-bin; Yang, You-Qing; Qi, Zhao-xin; Li, Shu-xia |
| 刊名 | JOURNAL OF MOUNTAIN SCIENCE
 |
| 出版日期 | 2019 |
| 卷号 | 16期号:5页码:1184-1197 |
| 关键词 | Salinized loess Desalinized loess Saltleaching Shear strength indices Moisture conten Salt content |
| ISSN号 | 1672-6316 |
| DOI | 10.1007/s11629-018-5206-9 |
| 文献子类 | Article |
| 英文摘要 | Moisture and salt content of soil are the two predominant factors influencing its shear strength. This study aims to investigate the effects of these two factors on shear strength behavior of loess in the Xining Basin of Northeast Qinghai-Tibet Plateau, where such geological hazards as soil erosion, landslides and debris flows are widespread due to the highly erodible loess. Salinized loess soil collected from the test site was desalinized through saltleaching in the laboratory. The desalinized and ovendried loess samples were also artificially moisturized and salinized in order to examine how soil salinity affects its shear strength at different moisture levels. Soil samples prepared in different ways (moisturizing, salt-leaching, and salinized) were measured to determine soil cohesion and internal friction angle. The results show that salt-leaching up to 18 rounds almost completely removed the salt content and considerably changed the physical components of loess, but the soil type remained unchanged. As salt content increases from 0.00% to 12.00%, both the cohesion and internal friction angle exhibit an initial decrease and then increase with salt content. As moisture content is 12.00%, the salt content threshold value for both cohesion and internal friction angle is identified as 3.00%. As the moisture content rises to 16.0% and 20.00%, the salt content threshold value for cohesion is still 6.00%, but 3.00% for internal friction angle. At these thresholds soil shear strength is the lowest, below which it is inversely related to soil salinity. Beyond the thresholds, however, the relationship is positive. Dissimilar to salinity, soil moisture content exerts an adverse effect on shear strength of loess. The findings of this study can provide a valuable guidance on stabilizing the engineering properties of salinized loess to prevent slope failures during heavy rainfall events. |
| 电子版国际标准刊号 | 1993-0321 |
| 语种 | 英语 |
| WOS记录号 | WOS:000467121200017 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/46501]  |
| 专题 | Journal of Mountain Science_Journal of Mountain Science-2019_Vol16 No.5 |
| 推荐引用方式 GB/T 7714 | Fu, Jiang-tao,Hu, Xia-song,Li, Xi-lai,et al. Influences of soil moisture and salt content on loess shear strength in the Xining Basin, northeastern Qinghai-Tibet Plateau[J]. JOURNAL OF MOUNTAIN SCIENCE,2019,16(5):1184-1197. |
| APA | Fu, Jiang-tao.,Hu, Xia-song.,Li, Xi-lai.,Yu, Dong-mei.,Liu, Ya-bin.,...&Li, Shu-xia.(2019).Influences of soil moisture and salt content on loess shear strength in the Xining Basin, northeastern Qinghai-Tibet Plateau.JOURNAL OF MOUNTAIN SCIENCE,16(5),1184-1197. |
| MLA | Fu, Jiang-tao,et al."Influences of soil moisture and salt content on loess shear strength in the Xining Basin, northeastern Qinghai-Tibet Plateau".JOURNAL OF MOUNTAIN SCIENCE 16.5(2019):1184-1197. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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