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日本国营铁路近年来有几座钢和预应力混凝土下承式组合梁和预弯曲组合梁进行过施工。这些特殊的组合梁,利用已架设的钢梁作为模型板的脚手架灌注混凝土,所以即使在施工中,也不占用桥下净空。 另外,由于用混凝土包着钢骨架,所以外观仍是混凝土梁,作为免维修、低噪音的桥梁,今后将被广泛采用。这次施工的桥梁都是小跨
In recent years, several Japanese state-owned railways have undergone construction of composite prestressed concrete beams and pre-bent composite beams. These special composite beams, which utilize the steel beams that have been erected as the scaffolding for the model panels, are filled with concrete so that even under construction the bridgehead is not occupied. In addition, because of the steel frame wrapped with concrete, so the appearance is still concrete beams, as maintenance-free, low noise bridge will be widely adopted in the future. The construction of the bridge are small cross