关键词: 水电站, 安全性评估, 三维有限元模型, 不均匀沉降

Abstract: The uneven settlement of foundation caused by changes in the surrounding working environment during long-term operation of hydropower station has a significant impact on the safety of the hydro- power structures.Taking a hydropower station project as an example,Midas/GTS NX software is used to establish a three-dimensional finite element model.First,based on actual monitoring data,the forced dis- placement method is used to simulate the uneven settlement of the powerhouse building caused by geological collapse.Second,with the existing settlement,the stress changes of the powerhouse structure under different working conditions are simulated and safety assessment of dangerous components is conducted. Lastly,using uneven settlement as a warning indicator,a safety monitoring and control method is proposed. The research results indicate that the three-dimensional finite element model modified by the forced dis- placement method can meet the safety assessment requirements for hydropower stations with uneven settlement,and can provide reference for the safety analysis and monitoring of hydropower structures

Key words: hydropower station, safety assessment, three-dimensional finite element model, uneven settlement