关键词: 拱坝, 径向位移, 监测数据, 异常分析

Abstract: From the perspective of geological conditions, dam foundation uplift pressure, dam body temperature field and operation conditions, comprehensive analysis of the causes of abnormal horizontal displacement of an arch dam is carried out. It is concluded that the abnormal radial horizontal displacement is mainly caused by the unfavorable working conditions, including the water level surge in low temperature season as well as water level rise during sudden drop of temperature. Furthermore, the measured radial displacement does not exceed the designed calculation results, which may provide optimization recommendations for daily operations.

Key words: arch dam, radial displacement, monitoring data, analysis of abnormal data