大型箱梁梁上运架受压箱梁受力性能现场监测  

Mechanical Performance Monitoring for Support Box Girders During Large Box Girders Transport and Erection on Box Girders

作　　者：王建强[1] 朱广杰 谢明权 WANG Jianqiang;ZHU Guangjie;XIE Mingquan(Zhengzhou University,Zhengzhou,Henan 450001,China;Zhengzhou School of Business Management,Zhengzhou,Henan 450003,China;The First Company of China Eighth Engineering Bureau Ltd,Ji’nan,Shandong 250100,China)

机构地区：[1]郑州大学,郑州450001 [2]郑州市商贸管理学校,郑州450003 [3]中建八局第一建设有限公司,济南250100

出　　处：《铁道工程学报》2025年第1期56-63,共8页Journal of Railway Engineering Society

基　　金：宁波市“科技创新2025”重大专项科技项目(2019B10076)。

摘　　要：研究目的:杭甬高速复线宁波段一期工程S1标段采用大型预应力混凝土箱梁(50 m/1650 t),箱梁使用YL1800型运梁车和JQ1800型架桥机进行梁上运架施工。由于受到待架设箱梁和运架设备的共同作用,下部受压箱梁的受力性能和安全性受到重视。为研究大型箱梁在梁上运架施工过程中下部受压箱梁的受力性能,评价梁上运梁施工方案的安全性,对梁上运架施工过程中下部受压箱梁进行现场监测和有限元分析。研究结论:(1)大型箱梁在运架施工过程中,下部受压箱梁跨中截面沿纵向顶板和底板均处于受压状态,沿横向顶板处于受压状态,底板中部受拉,两侧受压,且受压箱梁的挠度较小;(2)架桥机中支腿支撑处下部受压箱梁顶板和底板沿纵向、横向均处于受压状态;(3)大型箱梁在运架施工过程中下部受压箱梁的受力和变形满足规范要求,该梁上运架施工方案安全可行;(4)本研究成果可为大型箱梁的运架施工提供参考与借鉴。Research purposes:The 50 m/1650 t prestressed concrete box girders have been used in Section S1 of Ningbo Phase I of the Hangzhou-Ningbo expressway.The box girders are transported and erected by a YL1800 beam transport vehicle and a JQ1800 bridge erecting machine.Due to the combined actions of the box girders to be erected and the transport-erection equipment,the mechanical performance and safety of the support box girders should be paid more attention.To study the mechanical performance of the support box girders during the large box girders transport and erection on the box girders,evaluate the safety of the construction scheme,filed monitoring and finite element analysis of the support box girder were carried out.Research conclusions:(1)During the large box girder transport and erection on the box girders,the top plate and bottom plate of the mid-span section of the support box girder are pressed in longitudinal,the top plate is in compression state along the transverse direction,the middle part of the bottom plate is tensioned,the corners are compressed,and the girder deflection is small.(2)The top plate and the bottom plate of the girder erecting machine middle leg support section are in compression state along the longitudinal and transverse directions.(3)The mechanical performance and deflection of the support box girder meet the requirements of the specification,and the transport and erection scheme of the large box girders is safe and feasible.(4)The research results can provide a reference for the transport and erection of the large box girders.

关 键 词：大型箱梁 梁上运架 受力性能 现场监测 有限元分析 

分 类 号：U448.213[建筑科学—桥梁与隧道工程] U445.468[交通运输工程—道路与铁道工程]