(推荐单位:中国中铁股份有限公司)工程概况武汉天兴洲公铁两用长江大桥是世界上第一座按四线铁路修建的双塔三索面三主桁公铁两用斜拉桥,其正桥全长4657m,全桥共91个桥墩,混凝土总量约85万方。其中公铁合建部分长2842m,上层公路为六车道,宽27m,下层铁路为四线,其中两线一级干线、两线客运专线。南汊主桥为98+196+504+196+98m双塔三索面公铁两用钢桁梁斜拉桥。斜拉桥主梁为板桁结合钢桁梁,三片主桁,桁宽 (Recommended by: China Railway Group Co., Ltd.) Project Overview Wuhan Tianxingzhou Changjiang River Rail-to-Rail Bridge is the world's first double-track three-cable trussed three-girder cable- Its full bridge is 4657m in length, with a total of 91 bridge piers and a total concrete volume of about 850,000 square meters. Among them, the section of the joint construction of public railways is 2842m in length. The upper road is six lanes with a width of 27m. The lower railways are four lines, of which two are trunk lines and two-line passenger dedicated lines. Nanxun main bridge is 98 + 196 + 504 + 196 + 98m double-tower three-cable rail dual-purpose steel truss cable-stayed bridge. The main girder of cable-stayed bridge is plate truss combined with steel truss girder, three main girders and truss width