大跨度连续梁桥线形控制关键技术研究及应用  

RESEARCH AND APPLICATION OF KEY TECHNOLOGY OF ALIGNMENT CONTROL FOR LONG SPAN CONTINUOUS BEAM BRIDGE

作　　者：肖正东 叶雷雷 周善起 刘波 Xiao Zheng-dong;Ye Lei-lei;Zhou Shan-qi;Liu Bo

机构地区：[1]中建三局集团有限公司,武汉430075 [2]中国建筑股份有限公司,北京100000

出　　处：《建筑技术开发》2025年第4期117-120,共4页Building Technology Development

摘　　要：预应力混凝土连续梁桥悬臂浇筑法施工时,自重、弹性模量、预应力、收缩徐变、温度等诸多因素对桥梁线形影响较大,为确保成桥线形和内力满足设计与规范要求,桥梁施工的线形监测与控制至关重要。结合重庆轨道交通15号线御临河大桥的线形监测与控制实例,对大跨度预应力混凝土连续箱梁桥线形控制要点进行了研究。研究结果表明:根据现场监测数据与有限元仿真计算,对悬臂节段的标高实时监测、实时计算和实时预测,可确保桥梁最终实现高精度合龙。可为同类桥梁的施工线形监测与控制提供参考。During the construction of prestressed concrete continuous girder bridge by cantilever casting method,many factors such as self-weight,elastic modulus,prestress,shrinkage and creep,temperature and so on have great influence on the bridge alignment.In order to ensure that the alignment and internal force of the bridge meet the requirements of design and specification,the alignment monitoring and control of bridge construction is very important.Based on the example of linear monitoring and control of Yulin River Bridge on Chongqing Rail Transit Line 15,this paper studies the key points of linear control of long-span prestressed concrete continuous box girder bridge.The research results show that according to the field monitoring data and finite element simulation calculation,the real-time monitoring,real-time calculation and real-time prediction of the elevation of the cantilever segment can ensure that the bridge finally achieves high-precision closure.The article can provide reference for the construction linear monitoring and control of similar bridges.

关 键 词：预应力混凝土 连续梁桥 线形 监测与控制 有限元仿真 

分 类 号：TU448.215[建筑科学—岩土工程]