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- Title
Protective effect of retaining wall on rock avalanche: A case study of Nayong rock avalanche in China.
- Authors
Wang, Zhongfu; Shi, Fengge; He, Siming; Zhang, Xusheng; Wang, Jingying; Liu, Enlong
- Abstract
Rock avalanches are generally difficult to prevent and control due to their high velocities and the extensive destruction they cause. However, barrier structures constructed along the path of a rock avalanche can partially mitigate the magnitudes and consequences of such catastrophic events. We selected a rock avalanche in Nayong County, Guizhou Province, China as a case to study the effect of the location and height of a retaining wall on the dynamic characteristics of rock avalanche by using both actual terrain-based laboratory-model tests and coupled PFC3D–FLAC3D numerical simulations. Our findings demonstrate that a retaining wall can largely block a rock avalanche and its protective efficacy is significantly influenced by the integrity of the retaining wall. Coupled numerical simulation can serve as a powerful tool for analyzing the interaction between a rock avalanche and a retaining wall, facilitating precise observations of its deformation and destruction. The impact-curve characteristics of the retaining wall depend upon whether or not the rock avalanche-induced destruction is taken into account. The location of the retaining wall exerts a greater influence on the outcome compared to the height and materials of the retaining wall, while implementing a stepped retaining-wall pattern in accordance with the terrain demonstrates optimal efficacy in controlling rock avalanche.
- Subjects
GUIZHOU Sheng (China); CHINA; ROCKSLIDES; RETAINING walls; AVALANCHES; TERRAIN mapping
- Publication
Journal of Mountain Science, 2024, Vol 21, Issue 4, p1215
- ISSN
1672-6316
- Publication type
Article
- DOI
10.1007/s11629-023-8107-5