公路跨线桥全寿命周期设计方案研究

跨线桥上跨运营线路,其施工架设、养护、维修都受到下穿运营线路的影响.如何能在设计方案阶段便考虑到检测、监测、维修、拆除的安全便捷,成为跨线桥方案设计阶段需要考虑的问题.以辽宁省内一批新建跨线桥为背景,从全寿命周期角度考虑跨线桥设计方案,对各个寿命环节内需要解决的问题、得以实现的方法全面考虑,以保证跨线桥在全寿命周期内自身性能良好、对运营铁路影响小、经济效益最优.通过从运输、架设、设计细节、养护维修、阶段费用和全寿命周期费用等方面对3个方案进行对比分析,得到不同外部条件下所适用的不同的设计方案,为上跨铁路、公路桥梁快速架设、智能养护、全寿命周期成本等方面提供参考.

Research on Design Scheme of Full Life Cycle of Highway Overpass

Overpass spans the operating lines. Its erection, maintenance and repair are all affected by the underpass operating lines. How to consider the safety and convenience of detection, monitoring, maintenance and dismantling in the stage of design scheme has become a problem to be considered in the design stage of the overpass scheme. Based on the background of a batch of new overpass in Liaoning Province, the design scheme of overpass is considered from the full life cycle. The problems that need to be solved in each life link and the methods to be realized are fully considered to ensure that the overpass has good performance during the full life cycle, has little impact on the operating railway and has the best economic benefits. Three design schemes are compared and analyzed from the transportation, erection, design details, maintenance and repair, stage cost and life cycle cost, and the other aspects to obtain the different design schemes applicable under the different external conditions, which provides the references for the rapid erection, intelligent maintenance and life cycle costs of overpass railway and highway bridge.