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随着公路交通运输事业的发展,跨越通航河道的要求,迫切需要大跨径钢筋混凝土的各种桥型。使用拱式上部构造,能做成较大跨径,并能较多的节省材料。上部构造采用装配式,可以予制全部构件,节省模板数量,易于养生,并能保证工程质量。同时利用悬臂安装施工,不用脚手架,更可以节约很多木材,并省去装卸拱架所需要的很多时间。在水深流急,桥位很高的河道上采用这种型式建造效果更为显著,能达到施工快速,缩短工期的目的。
With the development of road transport and transportation, crossing the requirements of navigable waterways, various bridge types of long-span reinforced concrete are urgently needed. The use of arch top structure, can make a larger span, and can save more material. The upper structure of the assembly, can be made of all components, saving the number of templates, easy to health, and to ensure project quality. At the same time the use of cantilever installation construction, without scaffolding, but also save a lot of wood, and save the time required for loading and unloading arches. It is more obvious to adopt this type of construction effect in the river where the water depth is acute and the bridge is very high, so that the construction can be fast and the construction period shortened.