复杂异型系杆拱桥施工技术研究

Research on Construction Technology of Complex Special-shaped Bowstring Arch Bridge

摘要:

南京承天大道跨外秦淮湾大桥主桥为单孔157 m下承式空间多索面异型系杆拱桥。以秦淮湾大桥钢结构工程为依托，结合实际施工情况，制定了一套复杂空间异型扭曲系杆拱桥的制造和架设技术方案，系统阐述了正交异性板扁平钢箱梁节段划分，异型拱肋节段划分、制造、拼装、线形控制和架设等技术，并提出了制造和安装过程中的控制要点、具体施工措施。依据上述技术方案，秦淮湾大桥得以顺利制造、拼装，最终顺利合龙并通车。

Abstract:

The main bridge of Nanjing Chengtian Avenue Qinhuai Bay Bridge is a single-span 157 m through spatial multi-plane special-shaped bowstring arch bridge. Relying on the steel structure engineering of the Qinhuai Bay Bridge, combined with the actual construction situation, a set of manufacturing and erecting technical schemes for complex spacial special-shaped twisted bowstring arch bridge is formulated. The technical aspects such as division of orthogonal anisotropic plate flat steel box beam segments, and division, manufacture, assembly, alignment control and erection of special-shaped arch rib segments are systematically elaborated. The control essentials and detailed construction measures in the manufacturing and installation process are put forward. Based on the above technical scheme, the Qinhuai Bay Bridge was smoothly constructed and assembled. Finally, the bridge was closed and opened to traffic.