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联邦德国在修建东西城市铁路时,对杜塞尔多夫(Düsseldorf)与诺伊斯(Neuss)之间如何跨越莱茵河提出一项非常任务。经过仔细的计划与设计工作以后,从经济观点出发,决定修建一座大跨径四线铁路桥,代替已有的两座分设的桥梁。关于桥梁式样,长久争论不休,公开招标以后,在许多报价和建议方案中,最后选定以官方设计方案为指导的第四特别建议设计方案进行施工。一、官方设计方案与公开招标河中部分的梁部结构约占四线铁路桥总造价的70％,钢梁重量稍有增减,都显著地影响造价,因此减少河中部分梁部的单价,对降低全部工程造价起决定性作用。钢梁长度和跨径
The Federal Republic of Germany proposed a very important task for how to cross the Rhine between Düsseldorf and Neuss in the construction of the east-west urban railroad. After careful planning and design work, from the economic point of view, decided to build a long-span four-lane railway bridge, instead of the existing two separate bridges. As for the design of the bridge, there has been a long debate. After the open bidding, among many quotations and proposals, the final design of the fourth special proposal designed under the official design has been selected for construction. First, the official design and open bidding Beam part of the structure of the bridge accounts for about four lines of railway bridge total cost of 70%, a slight increase or decrease the weight of steel beams, have a significant impact on the cost, thus reducing the part of the river beam unit price, Reduce the total project cost plays a decisive role. Steel beam length and span