CAJ | 학술논문

武汉二七长江大桥主桥为三塔结合梁斜拉桥，主跨主梁由工字钢组合梁及预制桥面板结合，辅助墩与过渡墩间边跨为预应力混凝土主梁。全桥共有两个边跨合龙段，采用了顶推强制边跨合龙施工方案，通过顶撑系统将合龙口增大，吊装合龙段主梁后再缩小合龙口，实现主梁合龙。与常规工艺相比，成桥状态更符合设计理念，施工不受环境条件限制。
무한이칠장강대교주교위삼탑결합량사랍교，주과주량유공자강조합량급예제교면판결합，보조돈여과도돈간변과위예응력혼응토주량。전교공유량개변과합룡단，채용료정추강제변과합룡시공방안，통과정탱계통장합룡구증대，조장합룡단주량후재축소합룡구，실현주량합룡。여상규공예상비，성교상태경부합설계이념，시공불수배경조건한제。
The Wuhan Erqi Yangtze River Bridge is a triple-pylon steel-concrete composite girder cable-stayed bridge. Its primary girder in its main span was constructed using steel-concrete composite Girder made with I beams and precast concrete deck while the pre-stressed concrete primary girder was utilized in the side spans between the auxiliary piers and transition piers. There are two side span closures in the entire bridge section and forced closure by incremental launching was adopted during the construction. First, the closure was expanded using the incremental launching system, and then it was contracted once the primary girder for the closure was installed. This method accords more with the design philosophy than any other meth-ods and is free from interferences generated by the construction environment.