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一、概况 1905年日俄战争以后,日本帝国主义者为侵略我国,修建了沈(阳)丹(东)线[当时叫安(东)奉(无)线],并于1909年至1911年间,在丹东修建了鸭绿江桥(老桥)。老桥全长916.851米(3007英尺10英寸),计12孔,为6孔62.230米(204英尺2英寸)+5孔93.040米(305英尺3英寸)+1孔93.70米(306英尺4英寸)(开启梁)曲弦式下承铆接简支钢桁梁,其中第9孔(由朝鲜侧算起)为旋转式开启梁(以0号墩为轴)。桥台为木桩混凝土承台基础;桥墩为混凝土气压沉箱基础,刃脚均嵌入岩层,入岩深度0.3～2.27米之间。
I. General Situation After the Russo-Japanese War of 1905, the Japanese imperialists built the Shen (Yang) Dan (East) Line [then called An (East) Bong (No Line)) for the sake of invading our country. From 1909 to 1911, , Yalu River Bridge was built in Dandong (Old Bridge). The Ponte Vecchio is 916.851 meters (3007 feet 10 inches) long and measures 12 holes for 6 holes, 62.230 meters (204 feet 2 inches), 5 holes, 93.040 meters (305 feet, 3 inches), and 93.70 meters (306 feet, 4 inches) (Open Beam) Rounded lower riveted simply supported steel truss beams, of which No. 9 hole (counted from North Korea’s side) is a swingable open beam (No. 0 pier is the axis). The abutment is the basis of the pile cap for concrete pile foundation. The pier of the bridge is the foundation of the concrete pressure caisson, and the edge and the toe are all embedded in the rock strata. The depth of the rock is between 0.3 and 2.27 meters.