下穿式框构桥顶进施工的关键技术

摘要

在既有铁路路基下方增建框构桥时多采用顶进法施工,施工开始前需对既有铁路线路和路基进行必要的加固.以秦皇岛港煤五期工程翻车机房小区消防通道的施工为例,根据下穿式框构桥的结构特点,重点介绍在框构桥顶进施工中采取的几项关键性技术措施,可供类似工程参考.%Underpass framed bridge is added under the existing railway roadbed, and the jacking method is usually applied in construction. It is necessary to reinforce the existing railway line and roadbed before construction. Car dumper fire-fighting channel construction of Coal Terminal Phase-5 Project in Qinhuangdao Port is taken as an example to emphasize the characteristics of underpass framed bridge structure and several key technologies applied in the jacking construction, which will provide the reference for the similar project.