武广客运专线桥隧相连地段混凝土简支箱形梁施工方案

研究目的：解决武汉-广州客运专线铁路韶关-花都桥隧相连地段,整孔简支箱形梁运输不能通过隧道的问题。研究方法：针对自然条件和桥隧分布情况,从技术可行性、经济合理性、施工工期、简支箱形梁结构形式等方面进行系统分析研究。研究结果：提出了8种可行方案,并结合工程实际情况,采用了其中增加制存梁场、现浇整孔箱梁、后浇部分翼缘板整孔箱梁等方案,满足了工程建设的需要。研究结论：客运专线铁路桥隧相连地段简支箱形梁施工,可通过增加制存梁厂避免梁部运输过隧道、加大隧道断面、梁部现浇施工、双片式组合箱梁替代整孔箱梁、多片式箱梁替代整孔箱梁、后浇整孔箱梁部分翼缘板、修建绕避隧道的运梁便道、结合梁或大跨度混凝土桥替代混凝土整孔箱梁等多种方案综合比较后选用。

Design and Research on the Construction Scheme of Concrete Simply Supported Box Girder in Bridge - Tunnel Connection Section on Wuhan -Guangzhou Passenger Dedicated Line

Research purposes: To resolve the problem that the transportation of the integral simply supported box girder can not pass the tunnel in the bridge-tunnel connection section of Shaoguan-Huadu section on Wuhan-Guangzhou passenger dedicated line.Research methods:Aiming at natural conditions and distribution of bridges and tunnels,systematic analysis has been done from aspects of technical feasibility,economical rationality,construction period,the structural form of box girder and so on.Research results:Eight feasible schemes have been proposed,and combining with the practical situation of the engineering,schemes such as adding construction and receiving yards for girder structure,casting-in-situ the integral box girder,post concreting for partial flange plate of integral box girder,etc.have been adopted in order to meet the requirements of the engineering construction.Research conclusions:The construction of simply supported box girder in bridge-tunnel connection section on passenger dedicated line can be chosen by comparing various schemes synthetically such as adding construction and receiving yards for girder to avoid increasing the section of the tunnel for the transporting of the girder through it,casting-in-situ the girder,replacing integral box girder with twin-piece composite box girder,replacing integral box girder with multi-piece type box girder,post concreting partial flange plate of integral box girder,building access road to avoid the tunnel for transporting the girder and replacing concrete integral box girder with combined structure or long span concrete bridge,etc.