拱桥是最古老的桥型之一,也是在桥梁中最具美感的桥式,在我国有着悠久的历史。过去在拱桥建筑中常用支架施工,昂贵的膺架和摸板费用,使钢筋混凝土拱桥越来越失去竞争的能力。我国在六十年代的中期由于双曲拱桥的创建,大大地扩展了拱桥的使用,以后,又发展了桁架拱和多室箱形拱等不同形式的拱桥。它们的共同优点,就是对主拱圈进行分层,分片和分段,以适应无支架缆索吊装的施工。我们在学习这些先进经验的基础上,结合我省的实际情况,创出一条拱桥建筑的新路子,即悬臂拼装单室钢筋混凝土箱形拱桥。首先于1975年在兰溪县兰江大桥的中洲支桥试建一孔净跨60米的单室箱形拱人行桥,获得成功。1979年 The arch bridge is one of the oldest bridges and the most aesthetic bridge in the bridge. It has a long history in our country. In the past, bracket construction was often used in arch bridge construction. Expensive truss and pallet costs made the reinforced concrete arch bridge increasingly lose its ability to compete. In the mid-1960s, due to the creation of double-curved arch bridges, China greatly expanded the use of arch bridges. Later, trussed arches and multi-chamber box arches and other arch bridges were developed. Their common advantage is the stratification, slicing, and segmentation of the main arch to accommodate the construction of unsupported cable hoists. Based on these advanced experiences, combined with the actual situation in our province, we have created a new way of arch bridge construction, namely a cantilever-assembled single-room reinforced concrete box arch bridge. First, in 1975, a single chamber box-shaped arch bridge with a net span of 60 meters was constructed on the Zhongzhou branch of Lanjiang Bridge in Lanxi County. 1979