这是德大铁路龙居黄河特大桥（12月23日摄）。位于山东省东营市黄河入海口龙居镇的德大铁路龙居黄河特大桥24日将完成合龙，该桥是德大铁路建设中的攻坚点。据承建大桥的中铁一局称，该桥全长8.1公里，共有214个墩台，主桥结构为下承式“N”形桁变高度连续钢桁梁，呈“飞燕”展翅翱翔之势，最大跨度达180米，是黄河流域跨度最大、长度最长的铁路钢结构桥梁。德大铁路的建成有利于解决山东西部百姓乘铁路出行难的问题，同时成为胜利油田石油运输大动脉，对强化山西省煤炭资源外运的能力，促进山东和环渤海经济圈的发展将发挥重要作用。新华社记者 何俊昌 摄 This is the Yellow River railway dragon over the big bridge(Taken on December 23,).Is located in dongying city in shandong province, the mouth of the Yellow River in the town of dragon over the Yellow River railway dragon in the big bridge 24 will complete closure,The bridge is the crucial point over railway construction.According to the contract to build the bridge of iron says,The bridge length of 8.1 km,A total of 214 abutment,The main structure for the concrete-filled"N"A variable height girder continuous steel girder,is"tiny"Lift the wings of the potential,The largest span of 180 meters,The Yellow River is the biggest span/The length of the longest railway steel structure bridge.Deda railway built in western shandong people to solve the problem of travel by rail,At the same time become the victory oil field oil transportation artery,Shanxi coal resources to strengthen the ability of sinotrans,To promote the development of shandong and bohai economic circle will play an important role.The xinhua news agency HeJunChang perturbation

    12月23日，一位技术指挥人员在德大铁路龙居黄河特大桥上指挥吊装。新华社记者 何俊昌 摄     On December 23,,A technical command personnel in over the Yellow River railway bridge in dragon super command lifting.The xinhua news agency HeJunChang perturbation

   12月23日，工人登上德大铁路龙居黄河特大桥桥梁准备高空作业。新华社记者 何俊昌 摄    On December 23,,Workers over the dragon of the Yellow River railway bridge in the big bridge to work high above the ground.The xinhua news agency HeJunChang perturbation