Abstract: Crack detection and numerical simulation analysis were conducted for Lijiaxia dam, which explained the impact of cracks on dam structure safety, and provided technical support for economic operation of reservoir during non-flood period. The analysis showed that due to reservoir water level rise, the crack would extend to a certain degree and be in a stable state, which would not exert significant impact on dam safety.

Key words: dam, crack, analysis

摘要： 对李家峡大坝坝后裂缝进行检测和数值仿真分析，分析裂缝成因及对大坝结构安全的影响，为水库非汛期经济运行提供技术支撑。分析表明，当水库提高水位运行，裂缝扩展到一定程度后处于稳定状态，其对大坝安全不会产生明显的影响。

关键词: 大坝, 裂缝, 分析