列车荷载对长江沉管隧道的影响

Effects of train loads on immersed tunnel in Yangtze River

拟定中的京沪高速铁路南京长江沉管隧道，设计中需确定列车荷载的影响。本文根据弹性地基梁原理，采用计算各截面的影响线方法，按最不利情况加载，得到了最大的反应值（沉陷，剪力和弯矩），并采用三维有限元拟静力方式，对沉管隧道接头受力状态进行分析计算，计算结果为长江沉管隧道的初步设计提供了参考依据。

It is necessary for design to define the effects of train loads on Nanjing Yangtze River immersed tubular tunnel which is planning in the high speed railway line from Beijing to Shanghai. In this paper, According to the infection line method, the maximal values (sefflement, shear and moment) of the tunnel are calculated by using the theory of beams on elastic foundation. Then, the stress state on adapter between two immersed tubes is calculated based on 3-D finite element method. The numerical results provide references for preliminary design of the tunnel.