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泰州大桥三塔两跨悬索桥关键技术

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Keywords: 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

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Abstract:

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GPSRTK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.

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