摘要
随着我国城市交通的快速发展,车流量日益增加,部分主干道因桥梁限载、限速等原因已无法满足快速出行的交通需求,因而城市桥梁改扩建工程逐渐增多。既有桥梁的拆除相对于新建桥梁属于逆序施工过程,存在安全风险高、施工难度大、作业环境复杂等特点外,国内外类似工程可借鉴经验也稀缺。本文围绕绍兴市智慧快速路建设过程中拆除重建的柔性系杆拱桥施工,通过对该桥的拆除支架设计、吊杆切割后的应力重分布以及拆除过程的支架应力监测数据,形成类似桥梁的拆除技术研究,为特殊桥梁拆除提供参考依据。
With the rapid development of urban transportation in China,the traffic volume is increasing day by day.Some main roads are no longer able to meet the transportation needs of fast travel due to bridge load and speed restrictions,therefore the number of urban bridge renovation and expansion projects is gradually increasing.The demolition of existing bridges is a reverse construction process compared to the construction of new bridges,which has characteristics such as high safety risks,high construction difficulty,and complex working environment.Similar projects at home and abroad are also scarce for reference.This article focuses on the demolition of a flexible tied arch bridge that was removed and rebuilt during the construction process of the Shaoxing Smart Expressway.Through the design of the dismantling bracket,the stress redistribution after the suspension rod cutting,and the stress monitoring data of the supports during the demolition process,a study on similar bridge demolition technology is formed,providing reference basis for the demolition of specialized bridges.
作者
高勇
Gao Yong(China Railway 22nd Bureau Group Co.,Ltd.,Beijing,100010)
出处
《建设科技》
2024年第20期101-104,共4页
Construction Science and Technology
基金
中国铁建股份有限公司科技研究开发计划项目鉴湖大桥柔性系杆拱桥拆除及水上重建钢梁智慧建造技术研究(2020-C28)。
关键词
多跨柔性系杆拱桥
拆除
支架设计
应力分析
multi-span flexible tied arch bridge
demolition
support design
stress analysis
