外海环境斜拉桥弧线形索塔施工关键技术*
  • 作者: 毛晓斌,张敏,刘注,等
论文摘要

外海环境斜拉桥弧线形索塔施工关键技术*

毛晓斌1,张敏2,刘注2,刘健2

(1.中交路桥建设有限公司,北京 1000272.中交路桥华东工程有限公司,上海 201210)

[摘要]宁波舟山港主通道公路工程主通航孔桥为跨海特大斜拉桥,索塔采取空间双曲面弧线形设计。通过使用GPS静态测量技术,建立了施工测量控制网,确保索塔线形符合设计要求;通过钢管主动横撑和预应力拉杆的应用,解决了索塔悬臂施工过程中内应力难题,避免了塔柱混凝土根部开裂;通过加工制造索道管及钢锚梁锚固点定位盘,配合螺杆精调的方式,快速且高精度地完成了索道管和钢锚梁定位安装。

[关键词]桥梁工程;斜拉桥;索塔;测量;悬臂

[中图分类号]U445.4    [文献标识码]A    [文章编号]1002-8498(2021)08-0060-03

Key Construction Technology of Arc shaped Cable Tower of Offshore Cable stayed Bridge  

MAO Xiaobin1, ZHANG Min2, LIU Zhu2, LIU Jian2 

(1. Road & Bridge International Co., Ltd., Beijing 100027, China; 2. CCCC Road & Bridge East China Engineering Co., Ltd., Shanghai 201210, China)

Abstract: The main channel bridge of Zhoushan port in Ningbo is a super large cable stayed bridge crossing the sea. The cable tower is designed with spatial hyperboloid arc shape. GPS static measurement technology is used in the main navigation bridge, and the construction survey control network is established. It ensure that the cable tower line meets the design requirements. Through the design of steel pipe active cross brace and prestressed tie rod, the problem of internal stress in cantilever construction of cable tower is solved, and cracking of concrete tower column root is avoid. Through manufacturing cable duct and steel anchor beam anchor point positioning plate combining with the way of screw fine adjustment, the positioning and installation of cableway pipe and steel anchor beam are completed quickly and accurately.

Keywords:bridges; cable stayed bridges; cable tower; measurement; cantilever

*中交路建科技研发项目:海洋环境大曲率索塔快速施工技术研究(ZJLJ-2019-16

[作者简介]毛晓斌,高级工程师,Email: 742700914@qq.com

 

 

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