双曲拱桥是20世纪60、70年代公路桥梁的主要桥型。据不完全统计,苏北某地级市乡道、县道、国道、省道上现今仍有双曲拱桥810多座,约占桥梁数的3/4。这些桥梁中约有50%是按1972年交通部颁发的《公路工程技术标准(试行)》和1982年部颁《公路工程技术标准》(JTJ1-81)设计建造的,尚 Double Curved Arch Bridge is the main bridge type of highway bridge in the 1960s and 1970s. According to incomplete statistics, there are still more than 810 double-curved arch bridges, accounting for about 3/4 of the total number of bridges in the township roads, county roads, national highways and provincial highways at a prefecture level in northern Jiangsu. About 50% of these bridges were designed and constructed according to the “Highway Engineering Standard (Trial)” promulgated by the Ministry of Communications in 1972 and the “Highway Engineering Technical Standard” (JTJ1-81) issued in 1982,