基于少支架法拆除双曲拱桥施工技术研究  

Research on Dismantling Construction Technology of Double-curved Arch Bridge Based on Few Supports Method

作　　者：王文武 温庆杰[1] 王靖靖 陈虎 李君博 朱瑜兵 WANG Wenwu;WEN Qingjie;WANG Jingjing;CHEN Hu;LI Junbo;ZHU Yubing(China University of Mining and Technology,Jiangsu Xuzhou 221116;Nanchang County Urban Construction Investment and Development Group Co.,Ltd.,Nanchang 330299;China Railway Bridge Bureau Wuhan Bridge Special Technology Co.,Ltd.,Wuhan 430205;Nanchang University,Nanchang 330006)

机构地区：[1]中国矿业大学,江苏徐州221116 [2]南昌县城市建设投资发展集团有限公司,南昌330299 [3]中铁大桥局武汉桥梁特种技术有限公司,武汉430205 [4]南昌大学,南昌330006

出　　处：《公路交通技术》2024年第5期133-141,共9页Technology of Highway and Transport

基　　金：中铁大桥局集团有限公司科学技术研究与开发项目(2022-重点-24)。

摘　　要：为了实现双曲拱桥的安全稳定拆除,介绍了一种基于少支架法拆除双曲拱桥的施工技术。针对不影响航道通行、对周边影响小且经济效益较好等限制条件,先采用少支架支撑体系在双曲拱桥各跨1/4、3/4位置对主拱圈进行有效支撑;后采用小型破碎工具及静力切割设备遵循循序渐进、平衡对称的原则进行双曲拱桥的拆除;再采用Midas有限元软件对双曲拱桥拆除施工全工程进行仿真模拟分析,获取双曲拱桥在各施工阶段时拱肋主要控制截面及少支架支撑体系各构件的变形、应力理论值和限值;最后通过现场监测获取的构件变形、应力实测值与仿真模拟的理论值和限值进行对比。结果表明:监测结果均处于安全范围内,双曲拱桥拆除过程安全稳定,该技术可为双曲拱桥拆除施工与设计提供一种新的思路。In order to achieve safe and stable dismantling of double-curved arch bridges,a construction technique based on the method of few supports for dismantling double-curved arch bridges is introduced.In response to the limitations of not affecting waterway traffic,having minimal impact on the surrounding area,and having good economic benefits,a few support system is now adopted to effectively support the main arch ring at the 1/4 and 3/4 positions of each span of the double-curved arch bridge.Then small crushing tools and static cutting equipment were used to dismantle the hyperbolic arch bridge following the principles of gradual and balanced symmetry.Furthermore,Midas finite element software was used to simulate and analyze the entire dismantling construction project of the double-curved arch bridge,obtaining the deformation,stress theoretical values,and limit values of the main control sections of the arch ribs and the components of the few support system during each construction stage of the double-curved arch bridge.Finally,the measured deformation and stress values of the components obtained through on-site monitoring were compared with the theoretical and limit values obtained from simulation.The results indicate that the monitoring results are within a safe range,and the dismantling process of the double curved arch bridge is safe and stable.This technology can provide a new approach for the construction and design of double curved arch bridge dismantling.

关 键 词：少支架法 拆除 双曲拱桥 施工技术 有限元 施工过程模拟 施工监控 动态控制 

分 类 号：U445.6[建筑科学—桥梁与隧道工程]