强震区沟道堰塞体失稳模式及其动力学特征

周超; 常鸣; 徐璐; 庞海松; 余斌

doi:10.3799/dqkx.2021.127

Volume 48 Issue 8

Aug. 2023

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Zhou Chao, Chang Ming, Xu Lu, Pang Haisong, Yu Bin, 2023. Failure Modes and Dynamic Characteristics of the Landslide Dams in Strong Earthquake Area. Earth Science, 48(8): 3115-3126. doi: 10.3799/dqkx.2021.127

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Zhou Chao, Chang Ming, Xu Lu, Pang Haisong, Yu Bin, 2023. Failure Modes and Dynamic Characteristics of the Landslide Dams in Strong Earthquake Area. Earth Science, 48(8): 3115-3126. doi: 10.3799/dqkx.2021.127

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Failure Modes and Dynamic Characteristics of the Landslide Dams in Strong Earthquake Area

doi: 10.3799/dqkx.2021.127

State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China

Received Date: 2021-05-13
Publish Date: 2023-08-25

Abstract

Abstract

The loose solid materials generated by a large amount of landslides triggered by meizoseismal area fill up the valley or river, which is easy to form a landslide dam. It breaks out and forms outburst debris flow under heavy rainfall and the scouring action of rainfall-runoff. In this study, 12 experiments were designed using the self-made flume to reproduce the failure process of landslide dams with different grain size distributions and hydrodynamic conditions. The failure process, breach discharge, and mechanical parameters are carried out. The landslide dams are divided into three instability modes: overtopping, sliding, and piping. The formation reasons of these three types of dam failure mode are analyzed combined with the grain size distributions of the landslide dams. Based on the dynamic characteristics, landslide dams' stability under different failure modes is established The research results are of great significance for the planning and designing prevention and control projects of the dam-break debris flow and improving the level of debris flow disaster prevention and mitigation.
- landslide dam,
- failure mode,
- dynamic characteristic,
- critical condition,
- landslides

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References(43)

References

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Failure Modes and Dynamic Characteristics of the Landslide Dams in Strong Earthquake Area

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