阶梯型框架顶进桥下穿既有铁路施工技术研究

Study on construction technology of stair-style frame jacking underpassing existing railway

以某框架顶进桥的建设施工为例,通过对该项工程实际情况的考察分析,选用D型便梁架空既有铁路顶进下穿施工方法,并对采用D型便梁进行架空、滑板施工、框架桥顶进等施工工艺流程及其注意事项进行了系统说明,以期为城市道路下穿既有铁路的立交施工提供参考借鉴。

Taking the frame jacking bridge construction as an example,through analyzing the actual engineering conditions,the paper selects the construction method of D-style auxiliary girder aerial existing railway jacking underpassing,and systematically describes construction technology procedures and matters of aerial and sliding construction and frame bridge jacking of D-style auxiliary girder,with a view to provide some guidance for the interchange construction of urban road underpassing existing railway.