地铁高架桥与地下隧道衔接处路基过渡段设计研究

以广州地铁14号线的工程为例，对地铁高架桥与地下隧道衔接处路基过渡段设计进行研究，论证了路基过渡段的结构形式、填料设计、整体道床地基加固处理比选等，并对过渡段路基的工后沉降、CFG桩承载力进行检算，均满足规范要求。

Study on Design of Transition Section at the Junction of Viaduct and Underground Tunnel on Metro Line

Taking Guangzhou Metro Line 14 project as the example，this paper explored the design of transition section at the junction of the viaduct and the underground tunnel on the metro line to the extent that the structure form，filling design，and the comparison and selection of the roadbed foundation reinforcement of this transition section were demonstrated；moreover，the post-construction settlement of the subgrade thereof and the bearing capacity of CFG pile were calculated，all of which meet the standard requirements.