›› 2010, Vol. 31 ›› Issue (2): 604-608.

• Geotechnical Engineering • Previous Articles     Next Articles

Risk analysis of encountering rockfalls on transmission line towers

JIA Ning, MENG Qing-hui, JIA Jian   

  1. North China Power Engineering (Beijing) Co., Ltd., Beijing 100120, China
  • Received:2008-01-03 Online:2010-02-10 Published:2010-03-24

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Abstract:

Considering the slope features, location of the tower, size and quantity of potential unstable rock mass on the slope surface, and the size and quantity of the rock blocks at the slope toe, a feasible risk assessment method is put forward based on the energy of the rolling rock block reaching the tower, and the frequency of rockfalls. The velocity of the rock block rolling from a zigzag slope with a steeper segment near the slope toe is larger than that form a concaved slope. The tower located at the concaved side of a hill has more risk than the tower located at the convex side.

Key words: transmission line, poles and towers, potential unstable rock mass, rockfalls, risk analysis

CLC Number: 

  • TU 94+3.2
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