梁拱组合桥拱肋大节段不对称拼装施工关键技术  

Construction Technology and Simulation Analysis of Asymmetric Assembly of Large Segments of Arch Rib of Continuous Beam Arch Composite Bridge

作　　者：武秀军 WU Xiu-jun(China Railway Beijing Engineering Group Co.,Ltd.,Beijing 102308,China)

机构地区：[1]中铁北京工程局集团有限公司,北京102308

出　　处：《价值工程》2023年第8期70-72,共3页Value Engineering

摘　　要：拱肋拼装是大跨度梁拱组合体系桥成桥线形的关键,介绍雷岭河特大桥160m连续梁拱肋大节段吊装、不对称拼装关键技术,采用有限元方法,分析不利荷载工况下拱肋、支架体系及梁体局部的受力状态,并进行实时监测。结果表明:梁体混凝土最大应力为3.14MPa,局部拉应力较小,结构抗裂性能良好;拱肋存在一定的面外倾覆力矩,需设置缆风绳和柱脚斜撑;各体系应进行监测数据与理论数值检验,以保障支架安全。The assembly of arch ribs is the key to the bridge alignment of the long-span beam-arch composite system bridge.This paper introduces the key technology of the hoisting and asymmetric assembly of the 160m continuous beam arch ribs of Leilinghe Bridge,and uses the finite element method to analyze the stress state of the arch ribs,the support system and the local part of the beam under adverse load conditions,and carries out real-time monitoring.The results show that the maximum stress of the beam concrete is 3.14 MPa,the local tensile stress is small,and the crack resistance of the structure is good.The arch rib has a certain out of plane overturning moment,so cable wind rope and column base slant support shall be set.Each system shall carry out monitoring data and theoretical value test to ensure the safety of the support.

关 键 词：大跨度 钢管拱 不对称 抗倾覆 施工模拟 施工监测 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]