多跨连续预制肋拱桥线形控制技术  

Alignment Control Technology of Multi-span Continuous Prefabricated Ribbed Arch Bridge

作　　者：顾巍麟 徐大为 潘峰 GU Weilin;XU Dawei;PAN Feng(Shanghai Construction No.5(Group)Co.,Ltd.,Shanghai 200063,China)

机构地区：[1]上海建工五建集团有限公司,上海200063

出　　处：《建筑施工》2024年第3期392-395,共4页Building Construction

摘　　要：结合白石矶大桥扩建工程,研究了多跨连续肋拱桥线形控制技术。设计了拱肋的支架并建立有限元模型,模拟了支架的结构应力与变形。拱肋支架的支撑使用了新研发的加固型钢管桩系统,减少了支架的沉降。各分段预制拱肋采用了新研发的湿接头系统进行现浇连接,保证了各分段拱肋连接顺滑,控制整体拱桥线形。最后,拱桥应用了预应力系杆并研发了一种预应力桥梁结构挠度控制和加固装置,改善了拱桥的受力结构,保证了整体桥梁线形。Combined with the extension project of Baishiji Bridge,the alignment control technology of multi-span continuous ribbed arch bridge is studied.The support of arch rib is designed and the finite element model is established to simulate the structural stress and deformation of the support.The arch rib support uses a newly developed reinforced steel pipe pile system,which reduces the settlement of the support.Each segmental precast arch rib adopts the newly developed wet joint system for cast-in-place connection,which ensures the smooth connection of each segmental arch rib and controls the overall arch bridge alignment.Finally,the prestressed tie bar is applied to the arch bridge,and a prestressed bridge structure deflection control and reinforcement device is developed,which improves the stress structure of the arch bridge and ensures the overall bridge alignment.

关 键 词：线形控制 支架设计 湿接头连接 预应力系杆 

分 类 号：TU99[建筑科学—市政工程]