以浆砌片石顶替旧梁后新桥顶进施工技术

On the Push-and-Pull Operation of the New Bridge After the Old Girder Being Replaced with Mortar Rubble Masonry

近年来,随着交通流量的增大,市政道路工程的设计宽度显著增加,与之对应的对既有铁路桥梁配合市政道路拓宽拆旧顶新的技术成为施工难题。大灰厂东路市政道路下穿京原铁路K5+315.7顶进箱涵工程中,采用既有梁桥砌筑浆砌片石,置换既有T梁桥,然后顶进施工。介绍了技术方案实施过程,实际实施效果良好。

In recent years, with the increase in the traffic count, the designed width of municipal roads increases notably, in which case the techniques for the removal of the old girders and the pushing-and-pulling of new bridges in the engineering pro- jects of widening municipal roads have turned out to be a great difficulty in construction. The widening project of the Jing-Yuan- Railway-Under-passing municipal road of the Dahuichang Avenue East involves the pushing-and-pulling of a box culvert at K5＋ 315.7. Mortar rubble masonry is adopted for the existing bridge to replace the existing T-shape girder,and then the push-and- pull operation is performed. In the present paper introduced is the construction process of the technical schemes, which achieve very good results.