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最近在联邦德国的巴伐利亚州跨越阿尔根河正在修一座上承式钢筋混凝土单孔拱桥,桥梁全长230米,单拱跨径150米。这座拱桥在施工上的最大特点是采用了所谓的“竖向转体法”,即将每个半拱(高80米)在岸边竖向施工(类似桥墩施工),然后用吊装设备将两个已造好的半拱同时下落合龙,而形成整个拱圈。这种施工方法可分为四个步骤: 1.利用滑升模板由下向上浇筑半拱的混凝土; 2.利用吊装设备将两个半拱同时下落合龙并临时结合; 3.利用设在拱顶和拱脚处的千斤顶调整
Recently, a single-pass reinforced concrete single-hole arch bridge was being constructed across the River Algen in the Federal Republic of Germany in Bavaria, with a total length of 230 meters and a single span of 150 meters. The most prominent feature of this arch bridge is the so-called “vertical swivel method” of vertical construction of each half-arch (80 meters high) on the shore (similar to pier construction) and then lifting equipment A well-built semi-arch at the same time the whereabouts of closure, and the formation of the entire arch ring. This construction method can be divided into four steps: 1. Using half-arch concrete pouring up from the bottom up; 2. Use the lifting equipment to simultaneously drop the two half-archs and temporarily join them; Adjustments to the jacks at the foot of the arch