关键词: 混凝土面板, 运行期, 温度应力, 裂缝检查, 裂缝处理

Abstract: The overall anti-seepage scheme with reinforced concrete face slab is used in upper reservoir of the Ming Tombs pumped storage power station. By regular check to the cracks of concrete face slab, it is found that the number of cracks has been increasing year by year, exerting negative effect on antiseepage and durability. In this paper, fully considering of the conditions of outdoor climate and station operation, the author analyzes the thermal stress of concrete face slab during operation in winter and the change law and distribution characteristics of thermal stress of concrete face slab are obtained by means of simulation calculation. Based on the above mentioned calculation analysis and crack checking results, it is believed that thermal stress during operation in winter is the main reason for crack formation and development on concrete face slab. In order to ensure the long term safety operation of concrete face slab in upper reservoir, SK brushing polyurea is selected to repair the cracks and good effect is acquired.

Key words: concrete face slab, operation period, thermal stress, crack check, crack treatment