一种高速铁路隧道预制装配式基底结构静动力响应分析

针对传统铁路隧道设计和施工的不足造成的铁路隧道底部病害,以实际在建工程项目为依托,提出一种针对高速铁路隧道的预制装配式新型隧道底部结构,采用有限元数值软件分析了拼装构件整体及榫槽与关键接触位置在施工期和运营期不同荷载工况条件下的静动力响应。结果表明:该隧底结构在施工期及运营期荷载作用下应力、应变及加速度均低于设计混凝土的承载能力,结构满足行车荷载条件。

Static and Dynamic Response Analysis of Prefabricated Assembly Base Structure of High Speed Railway Tunnel

In view of the defects in therailway tunnel base caused by the insuff iciency of the design and construction of traditional railway tunnels,a new type of prefabricated assembly tunnel base structure for highspeed railway tunnels is proposed based on the actual construction projects.The static and dynamic responses ofthe whole assembly member,mortise and groove,and the key contact positions during the construction and operation periods under different load conditions are analyzed by using the finite element numerical softw are.The results show that the stress,strain and acceleration of the tunnel base structure under construction and operation periods are low er than the bearing capacity of the designed concrete,and the structure satisf ies the driving load conditions.