Study on Combined Anti Seepage Characteristics of Upper Reservoir for a Pump Station

Abstract:

Seepage control is one of the important problems when designing a hydropower station. The upper reservoir of one hydropower station was built by excavation and backfill partly. Its impermeable program is the combination by concrete panel, geomembrane and vertical curtain. With the finite element method , the model of the dam has been built. The potential distribution of groundwater in the library on the seepage filed is analyzed. It also analyzes the seepage slope of dam body, dam foundation and reservoir and calculates the seepage discharge and replenishment at the situation of normal storage level. The results show that potential distribution law of reservoir seepage field is clear and definite. The effect of cutting water head by anti-seepage curtain and curtain downstream under protective layer at the bottom of the coarse sand and back packing drainage is remarkable. The panel and geomembrane have an effect on cutting waterhead. The seepage flow of upper reservoir is 488.16m³/d and the supply flow is 1019.52m³/d. So the control scheme of the upstream seepage is reasonable technically.

• Periodical: Applied Mechanics and Materials (Volume 620)
• Pages: 238-243
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.620.238
• Online since: August 2014
• Authors: Bin Zhang, Zhen Zhong Shen*, Lei Yang, Yi Qi Zhou, Jia Zheng Yu
• Keywords: Combined Anti Seepage, Pumped Storage Power Station, Seepage Flux, Seepage Gradient, Upper Reservoir

References

[1] Wang En-zhi, Li Ang, Mao Wen-ran, Wu Hai-liang. Analysis of Three Dimensional Seepage Flow in Fractured Rock Masses of Huilong Energy Storing-up Station. Journal of Hydroelectric Engineering, 2004, 6(7).

[2] Huang Ji-wei, Yang Shu-hua, Zhan Ping-sheng, Nian Hong-fen. The Dam Foundation Seepage Control Practices under Complicated Geological [B]. Yunnan Water Power, 2005, 21(4).

[3] Li Yue-jun, Zhou Jian-ping, He Shi-hai, Hou Jing. Study on and Application of Geotech-Membrane in the Leakage Prevention Works of Reservoirs of the Pumped Storage Power Station [A]. Water Power, 2006, 32(3).

[4] Li Ping, Lu Wen-xi, Li Jun, Yang Wei. 3-D Numerical Simulation of Seepage in the Upper Reservoir of the Pushihe Pumped-storage Power Station. Hydrogeology and Engineering Geology, 2008, 35(2).

DOI: 10.1016/j.enggeo.2007.12.005

[5] Sun Dan, Shen Zhen-zhong, Cui Jian-jian. Seepage Numerical Simulation of Geomembrane Gravel Dam Caused by Geomembrane Defect. Water Resources and Power, 2013, 11(3).

[6] Shen Zhen-zhong, Jiang Hang, Shen Chang-song. Numerical Simulation of Composite Geomembrane Defect Leakage Experiment Based on Saturate and Unsaturated Seepage Theory. Journal of Hydraulic Engineering, 2009, 40(9).