混合梁斜拉桥索塔与下横梁异步施工控制分析  

Stress Analysis of Asynchronous Construction of Pylon and Bottom End Rail of Hybrid Girder Cable-stayed Bridge

作　　者：陈月萍[1] 张建飞[1] 胡强圣 

机构地区：[1]安庆职业技术学院建筑工程系,安徽安庆246000

出　　处：《安庆师范学院学报（自然科学版）》2015年第1期46-49,共4页Journal of Anqing Teachers College(Natural Science Edition)

基　　金：中央财政支持的建筑技术实训基地项目(34113042613);安徽省教育厅;财政厅支持的省级示范实验实训中心项目(20101474)

摘　　要：某特大桥索塔采用钻石型混凝土索塔,索塔总高度为177.91 m,在下塔柱与中塔柱相交位置设置一道下横梁。施工中塔柱与下横梁采用异步施工,即先将中塔柱施工到第二节段再进行下横梁施工。期间,索塔会出现悬臂状态,故索塔的薄弱截面易出现拉应力,这在桥梁施工中是要避免的,为此,先通过模拟分析异步施工过程对索塔的影响,给出相应的施工控制措施。A bridge is used with the diamond type concrete pylon,and its total height is 177. 91 m. In the intersection position of the Middle-Pylon and the Down-Pylon is the bottom end rail. The construction method of the pylon and bottom end rail are asynchronous constructed,which is we put the middle-pylon into the second construction segment,and then go on the bottom end rail. During the period,pylon will appear cantilever state,so the weak section prone to tensile stress; it is to be avoided in the bridge construction. The purpose of this paper is to simulate asynchronous process,to analyze the influence to the tower,and to give the corresponding construction measures.

关 键 词：混合梁斜拉桥 索塔 异步施工 主动支撑 施工阶段 

分 类 号：U445.559[建筑科学—桥梁与隧道工程]