既有铁路线鱼腹式预应力混凝土梁换梁施工

On girder exchange construction of fish-bellied prestressed concrete beam along existing railway

通过对既有铁路鱼腹式预应力混凝土换梁工程施工方案进行研究比选,提出了在既有铁路进行换梁设计与施工时,在大型机械无法实施的条件下,选用与既有桥梁形式相近、尽可能减少桥梁墩、台改造工作量的梁体的方案,以确保既有线的正常运营。

The paper researches and compares the construction schemes for the girder exchange of the fish-bellied prestressed concrete beam along existing railways,points out the girder similar to the existing bridge should be chosen in the girder exchange design and construction on existing railways to reduce the workload for the piers and platform with the condition that the large mechanical machine can not be used,so as to ensure the smooth operation of the existing railways.