客运专线64m双线节段拼装箱梁施工技术

Construction Technology for 64 Meters Double Track Section Assembled Simply Supported Box Girder of Passenger Dedicated Lines

以西成客专汉中汉江特大桥双线铁路64 m节段拼装预应力混凝土箱梁的节段预制、架设施工为研究对象,通过对施工过程工艺控制,总结客运专线双线大跨节段拼装简支箱梁梁段预制、架设施工技术,包括预制阶段的模板、胎具的加工及安装使用,钢筋工程,预埋件安设、孔道成孔和混凝土工程;架设阶段的梁段线形控制、预拱度设置、湿接缝施工、预应力张拉及张拉过程中的梁体体系转换。

Based on the segments precasting and erecting of the double track of 64m consolidated sections of prestressed concrete simply-supported box girders of Hanzhong-Hanjiang river super bridge on Xi＇ an-Chengdu Passenger Dedicated Line,through the control management on the worksite, the author summarizes the construction techniques of long-span of consolidated sections of simply-supported box girders segments precasting and segments erecting, including the steel tem- plate and molds processing and installation, reinforced engineering, the technology of laying embedment parts and pre-set- ting hole and concrete engineering in precasting stage; the linear control, the pre-eamber setting, the wet-joint construc- tion, the system transformation of girder in tension prestress in erecting stage.