丹阳市辖区的九曲河、丹金溧漕河是省、市干线航道,每年船舶流量达10余万艘,在苏南水运经济发展中起着举足轻重的作用。 在这两条46公里的航道上,现有桥梁20余座,这些桥梁大多是建于六十年代末七十年代初的双曲拱农用桥,其结构简单,承重能力小,至今受损严重,随时可能发生倒塌,造成翻 Jiuqu River and Danjin Lishu River in Danyang Municipality are provincial and city arterial watercourses. Each year, the ship traffic volume reaches more than 100,000, which plays a decisive role in the economic development of water transport in southern Jiangsu. There are more than 20 bridges in these two 46-kilometer waterways. Most of these bridges are double-arch agricultural bridges built in the late 1960s and early 1970s. Their simple structure and small load-carrying capacity have so far impaired , Collapse may occur at any time, resulting in turn