廖  汶  李海光  姚  嗣
    （上海市建工设计研究院 200433）

[提要]  以用于磁悬浮列车轨道梁的先张法预应力台座为工程背景，着重分析上海磁悬浮列车工程的台座设计方案及实际设计中遇到的问题。用三维有限元计算分析了台座及其桩的受力和变形特性，并且通过使用阶段的实际观测验证了计算分析结果，满足了实际工程的需要。
[关键词]  磁悬浮轨道梁  先张法预应力  张拉台座

A huge stretching bed design scheme is presented, which is used to produce prestressed track girder of the magnetic levitation railway project. Detailed design analysis of the stretching bed of Shanghai magnetic levitation railway project is made.A 3-D finite element computation, whose results are checked by the actual measurement data on the working structure, is carried out to analyse the mechanical and deformational properties of the bed and pile.
Keywords:  magnetic levitation railway girder; pretensioned prestressing; huge stretching becl