Journal of Jilin University(Earth Science Edition) ›› 2018, Vol. 48 ›› Issue (1): 203-212.doi: 10.13278/j.cnki.jjuese.20170151

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Physical Model Experiment on Overtopping Overflow Failure of Landslide Dam

Fu Jiankang1, Luo Gang1, Hu Xiewen1,2   

  1. 1. School of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 610031, China;
    2. Aseismic Engineering Technology Key Laboratory of Sichuan Province, Southwest Jiaotong University, Chengdu 610031, China
  • Received:2017-06-01 Online:2018-01-26 Published:2018-01-26
  • Supported by:
    Supported by National Natural Science Foundation of China (41402266) and Fundamental Research Funds for the Central Universities (2682015CX011)

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Abstract: As a kind of loose structured deposits, the stability of landslide dams reduces with the upstream water level rising. Under the worst situation, a sudden dam-breaking would happen. Taking the Tangjianshan barrier dam as the research object, based on the similarity principle, the indoor flume model experiments were conducted to simulate the whole failure process in different conditions, including different impoundment, upstream water level,and particles composition. The monitoring results indicate that:The failure process can be mainly divided into seepage, overtopping, scour, and breach; The smaller the proportion of the composition particles accounts for, the lower the allowed seepage gradient of the dam is; Under the same grading of composed material and the same upstream water level, the sectional breach size is positively correlated with the impounding water. The experimental results reveal the overtopping failure law of landslide dams,and provide some theoretical reference for a breach prevention.

Key words: landslide dam, seepage, overtopping, failure mechanism

CLC Number: 

  • P642.22
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