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Landslide Post-Failure

Geostructures, dynamics and risk mitigation of high-altitude and long-runout rockslides

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发表时间:2024-03-19 09:24作者:Yin Yueping来源:Journal of Rock Mechanics and Geotechnical Enginee

Geostructures, dynamics and risk mitigation of high-altitude and long-runout rockslides

Yueping Yin, Bin Li, Yang Gao, Wenpei Wang, Shilin Zhang, Nan Zhang


Abstract: Long-runout rockslides at high altitude could cause disaster chain in river basins and destroy towns and major infrasturctures. This paper firstly explores the initiation mechanism of high-altitude and long-runout rockslides. Two types of sliding-prone geostructure models, i.e. the fault control type in orogenic belt and the fold control type in platform area, are proposed. Then, large-scale experimental apparatus and associated numerical simulations are conducted to understanding the chain-style dynamics of rockslide-debris avalanche-debris flow. The results reveal the fragmentation effects, the rheological behaviors and the boundary layer effect of long-runout avalanche-debris flow. The dynamic characteristics of quasi-static-transition-inertia state and solid-liquid coupling in rapid movement of rockslide-debris avalanche-debris flow are investigated. Finally, the risk mitigation strategy of the non-structure and structure for resilient energy dissipation are illustrated for initiation, transition and deposition zones. The structural prevention and mitigation methods have been successfully applied to the high-altitude and long-runout rockslides in Zhouqu and Maoxian of the Wenchuan earthquake zone, as well as the other major geohazards in Qinghai-Tibet Plateau and its adjacent areas.


论文网址:https://doi.org/10.1016/j.jrmge.2022.11.001


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LPF3D
Landslide Post-Failure