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Analysis on dam-breaking mode of Tangjiashan barrier dam in Beichuan county

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Abstract

Tangjiashan landslide is a typical highspeed consequent landslide of medium-steep dip angle. This landslide triggered by earthquake took place in about semi-minute. The relative sliding displacement is 900 meters, so average sliding speed is about 30 meters per second. The longitudinal length of barrier dam which is formed by high-speed landslide along river is 803.4 meters; and maximum width crossing river is 611.8 meters. And its volume is estimated about 20.37 million steres. Through detailed geological investigation of the barrier dam, together with early geological information before earthquake, geological structures of the barrier dam and its stability of upstream and downstream slopes are studied when water level reaches different elevations in condition of continual after shocks with seismic intensity of 7 or 8 Richter scale. On this basis, dam-breaking mode of barrier dam is discussed deeply. Thereby, analytic results provide significant guidance and advices to front headquarters of Tangjiashan barrier dam, so that some proper engineering measures can be implemented and flood discharge can be carried out well.

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Authors and Affiliations

  1. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 610031, China

    Xiewen Hu, Gang Luo & Xiaoping Lv

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

    Xiewen Hu & Runqiu Huang

  3. Aseismic Engineering Technology Key Laboratory of Sichuan Province, Southwest Jiaotong University, Chengdu, 610031, China

    Xiewen Hu

  4. Chengdu Hydroelectric Investigation and Design Institute, China Hydropower Consulting Group, Chengdu, 610072, China

    Yubin Shi

Authors
  1. Xiewen Hu
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  2. Gang Luo
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  3. Xiaoping Lv
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  4. Runqiu Huang
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  5. Yubin Shi
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Correspondence to Xiewen Hu.

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Hu, X., Luo, G., Lv, X. et al. Analysis on dam-breaking mode of Tangjiashan barrier dam in Beichuan county. J. Mt. Sci. 8, 354–362 (2011). https://doi.org/10.1007/s11629-011-2097-4

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  • DOI: https://doi.org/10.1007/s11629-011-2097-4

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