高低塔斜拉桥合龙顶推控制分析

Analysis on Closure Jacking Control of Higher-lower Tower Cable-stayed Br-idges

文章以重庆双碑嘉陵江大桥高低塔斜拉桥施工监控为背景,用桥梁博士有限元软件建立梁单元模型,针对该桥的跨中合龙顶推控制进行计算分析,并通过理论计算顶推力所产生的位移与合龙前试顶实际结果的对比,最终确定水平顶推力及相应的控制位移值,以确保施工安全及达到设计要求。

With the higher-lower tower cable-stayed bridge construction monitoring of Shuangbei Jialing River Bridge in Chongqing as the background ,this article used the Dr.Bridges finite element software to establish the beam element model, conducted the calculation and analysis for the midspan closure jacking control of this bridge, and through comparing the displacement caused by theoretical calculation of jacking force with the actual test jacking results before the closure, it ultimately determined the horizontal jacking force and corresponding control displacement values, so as to ensure the construction safety and to meet the design requirements.