超高层大跨悬挑结构双层钢连桥整体提升分体技术研究
RESEARCH ON INTEGRAL LIFTING SPLIT CONSTRUCTION TECHNOLOGY OF DOUBLE-LAYER STEEL CONTINUOUS BRIDGE WITH SUPER HIGH-RISE LONG-SPAN CANTILEVERED STRUCTURE
芦志敏1
作者信息
- 1. 中铁建设集团南方工程有限公司,广州 514400
- 折叠
摘要
横琴铁建广场项目的大跨度悬挑双层钢连桥设置在近百米高空,存在较多的异形构件,还具有单构件重量大、焊接质量要求高等特点.考虑到该钢结构工程工期紧张、施工难度大、精度控制高等因素,常规吊装法较难满足实际需求.为解决上述问题,本工程研发出一种多周转可移动式钢结构拼装胎架,利用工字钢作为临时连接固定杆件,将两层钢连桥桁架在胎架上进行整体拼装,并采用液压整体提升法对整体桁架进行同步提升,在下层钢连桥桁架到位后对其进行固定并拆除临时连接杆件,继续提升上层钢连桥桁架,实现了双层钢连桥的整体提升分体施工和同步提升异步卸载.经工程实践证明,该施工技术确保了施工质量,提高了施工安全性和节约了工期,可为类似工程的施工提供参考依据.
Abstract
The long-span cantilevered double-deck steel bridge of Hengqin railway construction plaza project is set at an altitude of nearly 100 meters,there are many special-shaped members,and it also has the characteristics of large weight of single member and high welding quality requirements.Considering the factors of tight construc-tion period,difficult construction and high precision control of the steel structure project,the conventional hoisting method is difficult to meet the actual demand.In order to solve the above problems,a kind of multi-turnover mov-able steel structure assembly tire frame is developed in this project.I-steel is used as temporary connecting fixed member to assemble the truss of two-story steel bridge on the tire frame as a whole.The hydraulic integral lifting method is used to synchronously lift the integral truss.After the lower steel bridge truss is in place,it is fixed and the temporary connecting member is removed,and the upper steel bridge truss continues to be lifted.The integral lift-ing split construction and synchronous lifting asynchronous unloading of double-layer steel bridge are realized.It is proved by engineering practice that the construction technology ensures the construction quality,improves the con-struction safety and saves the construction period,and can provide a reference basis for the construction of similar projects.
关键词
超高层建筑/大跨度/悬挑结构/整体提升/异步卸载Key words
super high-rise building/long span/cantilevered structure/overall promotion/asynchronous un-loading引用本文复制引用
出版年
2024
NETL
NSTL
万方数据