Research on improving the durability of concrete face rockfill dams of pumped storage power stations in severe cold regions

Abstract

The operation condition of the reservoir of pumped-storage hydroelectricity is different from conventional hydropower station reservoir, which has the characteristics of frequent rise and fall of reservoir water level, fast rise and fall, and large drop depth. In order to adapt to the low-temperature operating environment in severe cold areas, higher requirements have been put forward for the construction materials and water stop system of the face slab rockfill dam in the design. Relying on Qingyuan Pumped-storage hydroelectricity, this paper systematically studies the cushion material design of concrete face rockfill dam, concrete mix ratio of face slab structure, surface water stop structure type, anti ice uplift measures of face slab surface, and puts forward suggestions on key anti freezing technologies of face slab rockfill dam in severe cold areas for reference of subsequent projects.

Keywords

pumped storage energy / severe cold areas / concrete face rock-fill dam / anti freezing and water stopping / sealing structure