QIN Peng-fei 1, 2, ZHENG Ya-ping 1

1. China Institute of Water Resources and Hydropower Research, Beijing 100038, China,
2. Beijing Zhongshuike hydropower technology utilizing limited liability company, Beijing 100038, China)

Abstract: The dam foundation of the Xiabandi Water Project is sand and gravel soil overburden, whose thickness reaches 150 m. According to the geological circumstances of the project, a scheme of "upper part wall and lower part curtain" was certified and adopted. The plastic concrete wall was 1.0 m thick and 80 m deep, and the grouting curtain was 70 m deep. "Drilling and splitting making trough" was executed in wall construction and "orifice-closed" was adopted in cement grouting. The wall deflection, stress and strain and dam foundation seepage were monitored after the reservoir impounded water. Results show that the dam seepage control system is in the early good workability state during storage, and vertical anti-seepage structure in deep sand gravel layer gets ideal anti-seepage effect. The successful example provides valuable experience for similar dam constructions in southwest, northwest mountain areas in our country, and also promotes the development of sandy gravel soil dams.

Key words: Xinjiang Xianbandi, sand and gravel layer, deep overburden, vertical anti-seepage

Published in: Journal of China Institute of Water Resources and Hydropower Research (Vol. 12 No. 3, 2014)