Author(s): Lu Hua; Pingyi Wang; Di Song; Meili Wang; Tao Yu; Linfeng Han; Ye Tian
Linked Author(s): Pingyi Wang
Keywords: Near-dam reservoir area; Landslide-generated impulse waves; Initial wave amplitude
Abstract: Landslide-generated impulse waves in the area near the dam of river-type reservoirs will endanger the stability of the dam and the safety of the dam structure and even pose a huge threat to the safety of downstream residents’ property. It is very important to explore the characteristics of Landslide-generated impulse waves in the reservoir area near the dam in time for the safety assessment of the dam. Experts and scholars both domestically and internationally focus on the study of dam overtopping and wave impact force, with relatively little attention given to the characteristics of wave surges in three-dimensional near-dam reservoir areas. This paper uses three-dimensional physical model experiments to study the characteristics of wave surges under the impact of landslides in near-dam reservoir areas. The results show that the wave’s amplitude decays along the way, and when they reach the dam, they are blocked by the dam and rise instantaneously. The amplitude of the first wave in front of the dam gradually decreases from both sides of the dam to the middle. The hydrostatic depth, landslide volume, width-to-thickness ratio of the landslide body, and inclination angle of the landslide body are the key control factors of the first wave amplitude in front of the dam, and the prediction method of maximum initial wave amplitude is given. It can provide theoretical guidance and technical support for landslide surge risk assessment and dam safety assessment.
Year: 2024