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Volume 45 Issue S1
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ZHANG Lucheng, ZHONG Qiming, YANG Meng, PENG Ming, LIU Jiaxin. Centrifugal model tests on overtopping-induced breaching of landslide dams[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(S1): 197-200. DOI: 10.11779/CJGE2023S10029
Citation: ZHANG Lucheng, ZHONG Qiming, YANG Meng, PENG Ming, LIU Jiaxin. Centrifugal model tests on overtopping-induced breaching of landslide dams[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(S1): 197-200. DOI: 10.11779/CJGE2023S10029
shu

Centrifugal model tests on overtopping-induced breaching of landslide dams

  • 1.

    Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210024, China

  • 2.

    Key Laboratory of Reservoir and Dam Safety, Ministry of Water Resources, Nanjing 210024, China

  • 3.

    College of Civil Engineering, Tongji University, Shanghai 200092, China

  • 4.

    Institute of Geotechnical Engineering, University of Natural Resources and Life Sciences, Vienna 1180, Austria

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  • Received Date: July 05, 2023
  • Available Online: November 23, 2023
    Graphical Abstract
    • Abstract
  • Based on the 400 g·t centrifugal model test system for dam breaching of Nanjing Hydraulic Research Institute, the centrifugal model tests are carried out to study the breach evolution law and breach mechanism of overtopping-induced breaching of landslide dams by using the "time-space amplification" effect of supergravity field generated by high-speed rotation. The effects of dam height, downstream slope ratio and dam material gradation on the overtopping failure process of landslide dams are investigated by the centrifugal model tests for the first time. The test results show that the breach process of a landslide dam can be divided into four stages, which are surface erosion, retrogressive erosion, erosion along the breach channel, and breach stabilization. Moreover, the peak breach flow is most sensitive to the dam height, followed by the mean particle size. The time to the peak is mainly affected by the downstream slope ratio, and the relative residual dam height after breaching is primarily susceptible to the mean particle size.
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    • References (10)
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