摘要
泰州大桥三塔两跨悬索桥采用人字型钢中间塔匹配连续+弹性索支撑体系,为控制活载引起的桥面纵坡变化,即保证桥梁竖向刚度,对中间塔刚度范围、主缆和中间塔鞍座抗滑安全系数加以规定。基于交通调查建立了车辆的车重谱模型用于中间塔疲劳计算。在多塔悬索桥制造与安装关键技术方面,利用GPS RTK信息化监控系统动态监测与控制中塔深水沉井基础定位、下沉施工。为了保证钢中间塔安装精度,涉及钢塔节段制造及线形控制技术、钢塔节段吊装技术两方面,建立了中间塔制造、安装全过程累积误差管理系统,并将钢塔高强度厚板焊接及焊接变形控制、钢塔柱节段水平预拼装、塔柱大节段吊装精度控制等工艺技术纳入管理系统。
The 3-pylon 2-span suspension bridge of Taizhou bridge adopts herringbone steel middle pylon continuous matching and elastic cable support system. In order to control deck longitudinal slope change caused by live load, that is to guarantee the bridge vertical stiffness, the middle pylon rigidity, the antiskid safety factor of the main cable and the cable saddle are stipulated. Based on the traffic investigation, vehicle weight spectrum model is established for the calculation of middle pylon fatigue. In the key technology of manufacturing and erection of the bridge, the technology of GPS RTK information monitoring system is used for dynamic monitoring and control in middle pylon caisson foundation positioning and sinking construction. In order to ensure the installation precision of the middle pylon, which is related to the steel pylon segment manufacturing, shape control and steel pylon segment lifting technologies, the cumulative error management system of the middle tower is also presented. The cumulative error management system for the whole process of middle pylon manufacturing and erection is established, and the technologies, such as the high strength thick plate welding and welding deformation control, steel pylon column section level pre assembly, pylon column large segment hoisting precision control technology, are integrated into the management system.
出处
《公路交通科技》
CAS
CSCD
北大核心
2015年第2期94-99,共6页
Journal of Highway and Transportation Research and Development
关键词
桥梁工程
多塔连跨悬索结构
设计与施工
结构体系
中间塔
刚度
沉井
钢塔节段
bridge engineering
multi-pylon multi-span suspension bridge
design and construction
structure system
middle pylon
stiffness
caisson
steel pylon segment
作者简介
吉林（1962-），男，江苏海安人，研究员级高级工程师．（JI-WANG@sina.com）
