Abstract
A group of landslides was induced along the road on the Batang River bank to the Yushu airport in Qinghai province, China, during the 2010 Yushu earthquake (Ms7.1). The main materials of the landslides are diluvial, with their lower boundary being along the second and third terrace of the river. The bed rocks of these landslide areas are limestone and slate. The slopes deformed and many cracks occurred during the Yushu earthquake, showing great potential of further landsliding and threatening to the safe operation of the road to the airport. To understand the initiation mechanism of these landslides and then take proper countermeasure works to stabilize these slopes, using the FLAC3D, we analyzed the three-dimensional stress state of the slopes. During the analysis, we proposed a concept of point safety factor, which is defined as the ratio of the shear strength and shear stress. The formation process of the landslide was analyzed through analyzing the distribution of the safety factor of differing areas. The case study on one landslide showed that this kind of stress-state analysis is a workable method to understanding the initiation mechanisms of coseismic landslides.
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© 2013 Springer-Verlag Berlin Heidelberg
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Wu, H., Yang, T., Ma, H., Zhang, H. (2013). Mechanism and Stability Analysis of the 2010 Yushu Earthquake (Ms7.1)-Induced Landslide Based on Point Safety Factor of Stress State. In: Ugai, K., Yagi, H., Wakai, A. (eds) Earthquake-Induced Landslides. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-32238-9_71
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DOI: https://doi.org/10.1007/978-3-642-32238-9_71
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