American Society of Civil Engineers


Experimental Research on the Shear Strength Deterioration between the Freezing and Thawing Surface of Melting Soil Slope in Seasonal Frozen Regions


by Yong-chun Cheng, (Department of Road and Railway Engineering, Jilin University, 5988, Renmin ST, Changchun, China), Qi Ge, (Department of Road and Railway Engineering, Jilin University, 5988, Renmin ST, Changchun, China; E-mail: jddaoqiao@163.com), and Yan He, (Department of Road and Railway Engineering, Jilin University, 5988, Renmin ST, Changchun, China)
Section: New Technology on Transportation Infrastructure (Pavement, Bridge), pp. 1-7, (doi:  http://dx.doi.org/10.1061/41064(358)320)

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Document type: Conference Proceeding Paper
Part of: ICCTP 2009: Critical Issues In Transportation Systems Planning, Development, and Management
Abstract: In seasonal frozen areas, shallow landslide hazards usually occur in soil slopes, which pose a serious threat to road safety. The factor leading to the soil slope failure is the shear strength reduction of the soil in the zone between the freezing and thawing surface. In this research, model experiments of freeze-thaw soil interface with different aggregate materials are designed by alternating the freeze-thaw cycling time and the water content of soil. Subsequently, the relationship between the shear strength and freeze-thaw cycling time is obtained. Finally a shear strength deterioration modal of the soil surface is proposed. The major parameters and influence factors of melting soil slope failure are related to the earth stress and slope geometry, so based on the fully understanding of the shear strength, the research result could not only present guidance to locate the landslide position, but also offer advices for slope design and stability analysis in seasonal frozen regions.


ASCE Subject Headings:
Experimentation
Shear strength
Deterioration
Freeze and thaw
Slopes
Highways and roads