DOI: 10.1002/2016GL069604
论文题名: Experimental evidence for shallow, slow-moving landslides activated by a decrease in ground temperature
作者: Shibasaki T. ; Matsuura S. ; Okamoto T.
刊名: Geophysical Research Letters
ISSN: 0094-8893
EISSN: 1944-8624
出版年: 2016
卷: 43, 期: 13 起始页码: 6975
结束页码: 6984
语种: 英语
英文关键词: ground temperature
; landslide
; smectite
Scopus关键词: Displacement control
; Landslides
; Shear strength
; Shear stress
; Soil testing
; Soils
; Temperature
; Effect of temperature
; Experimental evidence
; Ground temperature
; Rheological property
; Shear displacement
; Shear strength reduction
; Smectites
; Temperature dependent
; Shear flow
英文摘要: In order to understand the trigger mechanism of slow-moving landslides occurring in the early cold season from late autumn to winter, we investigated the effect of temperature on the shear strength of slip surface soils. Displacement-controlled and shear stress-controlled box shear experiments were performed on undisturbed slip zone soils under residual strength conditions. Test results conducted at temperatures from 9 to 25°C showed remarkable shear strength reductions with decreasing temperature. Creep-like slow shear displacements were induced by a decrease in temperature. These temperature-dependent shear behaviors are attributed to the rheological properties of hydrous smectite that dominantly compose the soil material along the failure surface. Our experimental results imply that ground temperature conditions influence slope instability, especially for shallow landslides occurring in smectite-bearing rock areas. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978264597&doi=10.1002%2f2016GL069604&partnerID=40&md5=796c1bbd9047a9399871e911e0cdbd1d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9856
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Disaster Prevention Research Institute, Kyoto University, Uji, Japan
Recommended Citation:
Shibasaki T.,Matsuura S.,Okamoto T.. Experimental evidence for shallow, slow-moving landslides activated by a decrease in ground temperature[J]. Geophysical Research Letters,2016-01-01,43(13).