关键词: 整体稳定, 抗裂设计, 体型优化, 高拱坝, 锦屏一级水电站

Abstract: The 305m high arch dam of Jinping I Hydropower Station is the highest one in the world .Due to the unsymmetrical geological and topographical conditions and a large quantity of geological defects at the dam site, the mechanical condition of dam body is unfavorable, which may lead to dam crack. Aiming at the unfavorable factors that could lead to dam crack, we studied the possible causes from an integral dam stability perspective, and put forward some anti-crack design solutions. The practice showed that the full utilization of arch dam self-adjustment performance and the comprehensive application of measures such as adopting high crack-resistant concrete, body shape optimization, treatment to the unsymmetrical geological and topographical conditions, as well as increasing stiffness of dam body in the river bed area, improved the anti-crack ability of the arch dam.

Key words: overall stability, anti-crack design, high arch dam, Jinping I Hydropower Station