Experimental Study on Flood Control during Construction for Jinping II Hydropower Station

Abstract:

Jingping II hydropower project is a diversion type hydropower station with low dam, long tunnel and large capacity. Cofferdams are set to retain water flow which will be diverted through a single tunnel during dry seasons, yet be designed to allow controlled flooding during flood seasons. A physical model is built to study the hydraulic features during flooding process. Then the velocity distribution at critical positions over the overtopped earth-rock cofferdams is tested under design flux and other working conditions, as well as other hydraulic parameters such as press distribution over cofferdam slopes. Moreover, the flow regime over cofferdams is observed, and then the section forms of cofferdams are optimized to ensure the safely passing of flood during construction.

• Periodical: Applied Mechanics and Materials (Volumes 212-213)
• Pages: 772-779
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.212-213.772
• Online since: October 2012
• Authors: Chun Ju Zhao, Yi Hong Zhou, Hong Min Guo
• Keywords: Construction Period, Flood Control, Jingpin II Hydropower Station, Overtopped Cofferdam

References

[1] Hydropower Industry Standards of the People's Republic of China, Code for model test of river diversion and closure during construction for hydropower & hydraulic engineering(DL/T5361-2006), 2006(CHN).

[2] Hydropower Industry Standards of the People's Republic of China, Specification For Construction Planning of Water Resources and Hydropower Engineering (SL303-2004), 2004(CHN).