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Journal of Mountain Science

, Volume 8, Issue 2, pp 354–362 | Cite as

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

  • Xiewen HuEmail author
  • Gang Luo
  • Xiaoping Lv
  • Runqiu Huang
  • Yubin Shi
Article

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.

Keywords

Tangjiashan Barrier Dam High-speed landslide Blocking river Dam-breaking 

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Copyright information

© Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Xiewen Hu
    • 1
    • 2
    • 3
    Email author
  • Gang Luo
    • 1
  • Xiaoping Lv
    • 1
  • Runqiu Huang
    • 2
  • Yubin Shi
    • 4
  1. 1.Faculty of Geosciences and Environmental EngineeringSouthwest Jiaotong UniversityChengduChina
  2. 2.State Key Laboratory of Geohazard Prevention and Geoenvironment ProtectionChengdu University of TechnologyChengduChina
  3. 3.Aseismic Engineering Technology Key Laboratory of Sichuan ProvinceSouthwest Jiaotong UniversityChengduChina
  4. 4.Chengdu Hydroelectric Investigation and Design InstituteChina Hydropower Consulting GroupChengduChina

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