三塔悬索桥中间塔施工关键技术  

Key technology research on construction for the middle tower of suspension bridge

作　　者：田唯[1,2] 刘建波[1,2] 游新鹏[1,2] 

机构地区：[1]中交第二航务工程局有限公司技术中心,武汉430040 [2]长大桥梁建设施工技术交通行业重点实验室,武汉430040

出　　处：《中国工程科学》2012年第5期23-28,共6页Strategic Study of CAE

基　　金：国家科技支撑计划资助项目(2009BAG15B02);交通行业联合科技攻关项目(2008-353-332-180)

摘　　要：泰州大桥中间塔采用深水沉井基础与纵向"人"字形钢塔相组合的结构形式,其施工极为复杂。该项目通过前期研究成果,在深水沉井基础施工过程中利用上下游锚墩定位技术,结合信息化实时监控系统,确保了沉井的准确定位和精确着床,同时采用终沉控制措施成功防止了沉井在终沉阶段的突沉、超沉现象。钢塔架设精度高,调整节段少,且在安装过程中结构存在多次体系转换,针对以上特点,采用几何控制的全过程控制理念,将节段制造误差、预拼装线性和架设误差进行统一分析,建立精度管理系统,最终钢塔的架设精度远远优于设计精度。泰州大桥中间塔施工取得了多项技术创新,形成了深水沉井施工与钢塔制造安装等关键技术,为今后类似工程提供了有益的借鉴。The middle tower of Taizhou Bridge consists of deep-water caisson foundation and steel tower with herringbone shape along the longitudinal direction. The construction is complex. Based on previous study, using the technology of up-stream and down-stream anchor pier positioning and the system of information real-time monitoring ensures position and implantation. Meanwhile, control measure is used to prevent caisson sinking sud- denly and extra-sinking in final stage. Erection accuracy of steel tower is very high, but adjusted segments are few. During the construction, the structure system changes frequently. To the feature, the method of whole process control based on geometric control is used in the project, which analyzed the error of manufacturing segment, linear of pre-assembled segment and erection, and accuracy management system is established uniformly. The final accuracy of erection is better than that designed. Many innovative technologies are obtained in this project, and the key technologies about construction of deep-water caisson , manufacturing and erection of steel tower are formed, which can be referred for other similar projects in the future.

关 键 词：泰州大桥 锚墩定位 实时监控 终沉控制 全过程控制 架设精度 

分 类 号：U446.2[建筑科学—桥梁与隧道工程]