拆除旧桥顶进新桥施工技术

Construction Techniques for Demolishing an Old Pre-stressed U-type Bridgeand Jacking-in a New Reinforced Concrete Frame Bridge

结合怀柔区迎宾南路与京承线相交处的旧桥改造,介绍采用切割法切割既有U形铁路混凝土桥、D24军便梁加固既有铁路以及桥体顶进施工的工艺,为类似的工程提供一定的借鉴。

With the transformation of the old bridge at the crossroads of the Yingbinnan Road and the Beijing Chengde Railway in Huairou District as a practical example, the cutting method adopted for cutting the existing U-type railway concrete bridge, the method of strengthening the existing railway with D-24 military convenient girders, and the construction process for jacking in the new bridge body are presented in the paper. This construction process may serve as a reference for similar projects in future.