跨墩龙门架在桥梁加宽改造中的应用

The Application of Gantry Spanning Piers in Bridge Widening and Renovation

以红庙子辽河大桥维修改造工程为例,介绍了桥梁加宽改造方案以及跨河段T梁架设技术方案,总结关键施工技术。通过延长盖梁两端长度,为龙门架提供有效支点,成功上跨辽河主河道,完成了既有T梁横向移动及新梁架设,为类似桥梁加宽改造项目提供经验参考。

Taking the maintenance and renovation project of the Hongmiaozi Liaohe bridge as an example,the bridge widening and renovation scheme as well as the technical scheme for erecting T-beams across the river are introduced,and the key construction technology is summarized.By extending the length of both ends of the cover beam,the effective supporting points are provided for the gantry,so as to successfully cross the main river channel of Liao River,and complete the lateral movement of the existing T-beams and the erection of new beams,as well as provide the experience reference for other similar bridge widening and renovation projects.