地铁明挖车站主体结构计算中的几个关键点

Several Key Points in Main Structure Calculation for Cut and Cover Metro Station

针对地铁明挖车站结构设计中最为重要的结构计算环节,结合相关规范要求和工程经验,系统地归纳和总结了结构计算过程中一系列关键点,包括地铁明挖车站结构计算的基本原则、计算模型简化方法、有限元软件应用注意事项、荷载组合的应用、荷载取值、抗浮措施模拟、被动土压力模拟、重合墙结构与叠合墙结构模拟、车站柱上板带和跨中板带的理解和处理、构件内力的削峰和调幅方法、车站盾构孔边梁模拟、车站风道和通道顶过梁及挑耳板计算等,并提出了一些新思路。

Focusing on the most important aspects of the structure calculation in structural design for cut and cover metro stations, the paper combines with the relevant rules, requirements and experience in engineering, systematically classifies and summarizes a series of key points in the process of structural calculation, including the basic principles of structure calculation on cut and cover metro stations, the model simplified method, finite element software application considerations, applications of load combination, load values, anti- float measures analog, simulation of passive earth pressure, simulation for overlapping wall structure and superimposed wall structure, understanding and treatment of station column upper board and middle cross board, peak clipping of member internal forces and adjustment method, analog of side beam for shield hole in station, computing of station air channel and corridor top lintel and ear board and so on, some new concepts are put forward.