Temperature-dependent shear behavior of glacial till-ice composite: Experimental insights from the southeastern Tibetan Plateau
文献类型：期刊论文
| 作者 | Liu, Zhenxing1,2; Wang, Jiao3; Cui, Peng2,3; Jiang, Yao3; Wei, Tao1,3; Cao, Jingxuan1,3 |
| 刊名 | COLD REGIONS SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2026-02-01 |
| 卷号 | 243页码:104776 |
| 关键词 | Glacial till Strength degradation Temperature effect Temperature control triaxial test |
| ISSN号 | 0165-232X |
| DOI | 10.1016/j.coldregions.2025.104776 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | The Tibetan Plateau, often referred to as the Third Pole, exhibits heightened sensitivity and vulnerability to global climate change. It has been documented that the progressive retreat of high-altitude glaciers in this region, a phenomenon attributed to global warming, has led to the accumulation of extensive loose and unvegetated glacial till with buried ice (glacial till-ice composite). These unconsolidated deposits frequently serve as primary source materials for glacier-related hazards, including landslides and debris flows. Especially, the Parlung Tsangpo drainage basin in the southeastern portion of the Tibetan Plateau contains many glaciers with associated unconsolidated till. While significant efforts have been directed toward assessing the potential risks of glacier hazards in this area, the mechanical properties of glacial till-ice composite in response to climate warming remain poorly understood. To address this gap, a series of shear tests on glacial till-ice composite were conducted using a high-precision, temperature-controlled triaxial coupling test system, aiming to elucidate the shear deformation characteristics of glacial till-ice composite under varying temperatures and ice content levels. The findings reveal that the internal friction angle and cohesion of glacial till-ice composite undergo stage-wise changes with temperature, with the most pronounced reduction in strength observed within the -3 to -5 degrees C range. Furthermore, within this temperature interval, the cohesion of glacial till-ice composite demonstrates an exponential increase with rising ice content. In contrast to conventional frozen soils, glacial till-ice composites exhibit strength degradation over a narrower temperature range, characterized by accelerated strength attenuation and more significant strength loss during the deterioration process. To quantify these effects, Boltzmann and exponential attenuation functions were introduced to describe the influence of temperature and ice content on the shear strength of glacial till-ice composite. Based on the experimental results, a critical shear strength line for glacial till-ice composite was established as a function of temperature and ice content, and a strength degradation model incorporating these variables was developed. This model offers theoretical backing for disaster prevention and risk assessment of glacier debris flows. |
| URL标识 | 查看原文 |
| WOS关键词 | TRIAXIAL COMPRESSION ; SILTY SAND ; STRENGTH ; DEFORMATION ; HAZARDS ; DEBRIS ; MECHANISMS ; FAILURE ; STRESS ; TESTS |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001640184200001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/219713]  |
| 专题 | 陆地表层格局与模拟院重点实验室_外文论文 |
| 通讯作者 | Wang, Jiao |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China; 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Engn Resilience, Chengdu 610213, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Liu, Zhenxing,Wang, Jiao,Cui, Peng,et al. Temperature-dependent shear behavior of glacial till-ice composite: Experimental insights from the southeastern Tibetan Plateau[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2026,243:104776. |
| APA | Liu, Zhenxing,Wang, Jiao,Cui, Peng,Jiang, Yao,Wei, Tao,&Cao, Jingxuan.(2026).Temperature-dependent shear behavior of glacial till-ice composite: Experimental insights from the southeastern Tibetan Plateau.COLD REGIONS SCIENCE AND TECHNOLOGY,243,104776. |
| MLA | Liu, Zhenxing,et al."Temperature-dependent shear behavior of glacial till-ice composite: Experimental insights from the southeastern Tibetan Plateau".COLD REGIONS SCIENCE AND TECHNOLOGY 243(2026):104776. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。