Large-scale rock landslide slip surface location analysis and strength parameters evaluation |
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Authors: | Min You Dexin Nie |
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Institution: | (1) School of Civil Engineering and Mechanics, Lanzhou University, 730000 Lanzhou, China;(2) College of Geographic Science, Nanjing Normal University, 210097 Nanjing, China; |
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Abstract: | Large-scale rock landslides have huge impacts on various large-scale rock engineering and project operations. They are also
important aspects evaluating geological disasters. In the initial evaluations on the stability of large-scale rock landslides,
in most cases, it is difficult to conduct evaluation or to have accurate evaluations because most of large-scale rock landslides
are huge in size, high in slopes, and located in the canyon of mountains, which makes the exploration very difficult and thus
hard to get credible data on slip surface form, location, depth and strength. This paper describes the Badi landslide happened
along the Lancang River, and systematically introduces methods to analyze and verify large-scale slip surface form using terrain
conditions surrounding the large-scale landslide, shape of the slide walls, and development patterns of streams and gully.
This paper also introduces ways to obtain strength parameters of slip surface with the soil in the slide zone by using the
principles of stress state, principles of gravity compaction, structure regeneration and strength regeneration. It is confirmed
that analyzed results to the slip surface are basically consistent with the exploration results. The methods introduced here
have been successfully applied to evaluate the stability of Badi large-scale rock landslide and have been applied in engineering
practices. |
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