大吨位箱梁曲线段梁上运梁承压箱梁受力分析  

Analysis of Support Box Girder During Large Tonnage Box Girder Transport on Girders in Curve Segment

作　　者：王建强[1] 朱广杰 王飞 赵卓 WANG Jianqiang;ZHU Guangjie;WANG Fei;ZHAO Zhuo(Zhengzhou University,Zhengzhou,Henan 450001,China;Zhengzhou School of Business Management,Zhengzhou,Henan 450003,China;Zhejiang Engineering Technology Research Center of Civil Engineering Industrialized Construction,Ningbo,Zhejiang 315000,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]浙江省土木工程工业化建造工程技术研究中心,宁波315000

出　　处：《铁道工程学报》2024年第3期45-51,共7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标段采用大吨位预应力混凝土箱梁(50 m/1650 t),使用YL1800型运梁车采用单车跨双幅梁上运梁方案,为研究大吨位箱梁在小半径曲线段(R=1800 m)进行梁上运梁时下部承压箱梁的受力性能,验证运梁方案的可行性,对下部承压箱梁进行了测试与分析。研究结论:(1)大吨位箱梁在梁上运梁过程中,承压箱梁跨中截面顶板、底板沿纵向均处于受压状态,顶板沿横向处于受压状态,箱梁的受力满足规范要求;(2)随着运梁车偏载距离的增大,承压箱梁的应力和跨中挠度逐渐增大,运梁车向低侧偏载时对箱梁应力和跨中挠度影响较大,建议在梁上运梁时运梁车向高低两侧偏载不应超过1000 mm;(3)本研究成果可为大吨位箱梁梁上运梁施工提供参考。Reseach purposes:The large tonnage prestressed concrete box girders(50 m/1650 t)have been used in Section S1 of Ningbo Phase I of Hangzhou-Ningbo expressway.The box girders are transported on two box girders using YL1800 girder carrier.In order to study the mechanical performance of the support box girders when the large tonnage box girder is transported in the small radius curve segment(R=1800 m),and verify the feasibility of the girder transportation scheme,the support box girders is in-situ tested and analyzed.Research conclusions:(1)During the large tonnage box girder transported on the box girders,the top plate and bottom plate of the mid-span sections of the support box girders are pressed in longitudinal,and the top plate is pressed in transversal.The stress of the support box girders meets the requirements of the specifications.(2)With the increase of the eccentric load distance of the girder carrier,the stress and mid-span deflection of the support box girders gradually increase.The eccentric load of the girder carrier towards to the lower side has a greater impact on the stress and mid-span deflection of the support box girders.It is recommended that the eccentric load of the girder carrier towards to the both sides should not exceed 1000 mm.(3)The research results can provide reference on the construction of the large tonnage box girders transport on the girders.

关 键 词：大吨位箱梁 梁上运梁 小半径曲线段 现场测试 有限元分析 

分 类 号：U445[建筑科学—桥梁与隧道工程]