前支点挂篮预压桥梁施工技术  

Construction Technology for Pre-compaction Bridge with Suspended Wagon at Front Support

作　　者：刘冬冬 董乐安 陈林 

机构地区：[1]中交二航局,遵义市563000 [2]北京华通公路桥梁监理咨询有限公司,北京市100000

出　　处：《北方交通》2017年第7期43-48,共6页Northern Communications

摘　　要：赤石大桥主桥为四塔双索面预应力混凝土斜拉桥,主梁为预应力混凝土箱梁,主梁0#梁段采用支架法进行现浇,其余梁段施工采用大型前支点挂篮悬臂浇筑法进行施工,在1#块施工前需对已安装好的挂篮进行预压,来验证挂篮结构的可靠性,通过监测获得挂篮各项应力应变指标,结果表明挂篮结构安全可靠,挂篮的实际受力情况与设计状态吻合。The main bridge of Akaishi Bridge is a prestressed concrete cable-stayed bridge with four-tower double cable plane,and its main girder is a prestressed concrete box girder. The method with bracket is adopted for 0# girder section of main girder to perform the cast-in-situ,and cast-in-place cantilever method with large suspended wagon at front support is adopted for the construction of the rest girder sections. Before the construction of 1# block,it is necessary to pre-compact the installed suspended wagon to verify the reliability of suspended wagon structure. All kinds of stress-strain indexes of suspended wagon are obtained by monitoring. The results show that the structure of suspended wagon is safe and reliable and the actual stress situation of suspended wagon coincides with design condition.

关 键 词：挂篮设计 预压 应力监测 

分 类 号：U445[建筑科学—桥梁与隧道工程]