大型多岔调压井衬砌混凝土结构三维有限元分析

FEM analysis of large multi-fork surge-shaft lining structure

大型多岔调压井通常具有空间结构复杂、受力条件多变、且易受地质条件和地下水位等多因素影响的特点,为评价其衬砌混凝土结构安全,以黑泉水库左岸调压井为例,采用ANSYS系统构建大型多岔调压井三维有限元数值模型,计算分析了不同工况下衬砌混凝土受力和应力分布特征,在此基础上进行了调压井结构配筋复核、抗裂验算及裂缝扩展宽度验算等复核计算,最后基于验算结果给出了合理的工程指导建议,作为多岔调压井工程设计和工程运行管理时的借鉴.

Large multi-fork surge-shaft possesses the characteristics of complicated structure,variable stress conditions and is easy to be affected by the geological conditions and groundwater level and other factors.To evaluate the safety of the lining concrete structure?the surge-shaft in the left bank of Heiquan reservoir is taken as an example,the FEM analysis is conducted based on ANSYS and the de-formation and stress characteristics of the surge-shaft is studied.The design check such as the reinforce-ment check,crack width and crack propagation checking is conducted based on the structural analysis results.Finally,the engineering guidelines are provided based on the check results,which can provide reference to design and management of multi-fork surge-shaft engineering.