集贤路跨派河桥钢桁拱桥施工关键技术

Key Construction Technique of Steel Truss Arch Bridge Crossing Paihe River in Jixian Road

集贤路跨派河桥主桥为53.9 m+132 m+53.9 m三跨连续桁箱组合形式,主桥钢梁结构复杂、栓接结构精度控制要求高、整体线型控制难度大等技术难题,厂内制作针对不同部位的构件分别制定了不同的制作工艺方法,工地安装采用支架法从两端向跨中架设,支座段牛腿、桥面系及钢桁拱圈各部分,分别采用不同的架设方法.最后在主跨跨中合龙。

The main bridge of the bridge crossing Paihe River in Jixian Road is a combining form of 53.9 m+132 m+53.9 m three-span continuous truss box.The steel girder structure of the main bridge is complex,the accuracy control requirement of bolting structure is high and the control difficulty of the overall alignment is large.Aiming at the diflerent positions of component,the in—plant manufacture separately determines the different manufacturing processes.The site installation adopts the support method of erecting from two ends to the middle of span.The corbels at support section,deck system and steel truss arch rings are erected separately by the different methods,and finally are closured at the middle of main span.