Estimation of Excavation Disturbed Zone of High Slope in the Left Bank of Jinping-I Hydropower Station

Abstract:

The proposed Jinping-I hydropower station is located on the middle reach of the Yalongjiang River, Sichuan Province, P.R. China. It consists of a double-curvature arch dam with a maximum height of 305 m, which will be the highest in the world. Excavation disturbed zone (EDZ) in the left bank slope is one of the most important aspects in slope stability and deformation evaluation. This paper is focused on estimation of EDZ in the left bank slope of Jinping-I hydropower station based on numerical simulation. Geological conditions of the left bank slope are firstly analyzed. Then, displacement field of the slope during excavation is calculated by finite element method (FEM). It can be indicated that the model and parameters in this paper is reasonable by comparing observed results with calculated ones. EDZ in the left bank slope can be estimated based on the calculated displacement field. It can be inferred that the range of EDZ is related to the controlling discontinuities such as fault f42-9 and Lamprophyre X etc. which are adjacent to the excavation line.

• Periodical: Applied Mechanics and Materials (Volumes 212-213)
• Pages: 998-1003
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.212-213.998
• Online since: October 2012
• Authors: Jun Peng, Guan Rong, Zhi Lin Li
• Keywords: Excavation Disturbed Zone (EDZ), Jinping I Hydropower Station, Numerical Simulation

References

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