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沪通长江大桥跨南岸大堤桥布置为3×112m,3跨简支钢桁梁桥,其中32和31号墩号桥墩位于江面上且31号墩连接主航道斜拉桥,33号桥墩位于大堤前面的江岸边,34号桥墩位于大堤后面并连接南岸公铁合建段预应力混合土简支梁。通过建模计算施工中的钢桁梁和33号桥墩在最不利工况下的荷载情况,按照荷载需求加固33墩整体抗弯性能,在33号墩墩顶安装最前面的4个节间的钢梁后,在钢梁顶端安装2台可移动架梁吊机,该吊机在33号桥墩墩顶向南北两侧同时悬臂安装架设钢梁。这种对称悬臂架设方案可以节省工程费用,提高工程效率,并且安全可靠。在沪通长江大桥简支钢桁梁架设的施工中创新的使用大悬臂对称架设技术,可为同类工程施工提供参考。
The embankment bridge across the South Bank of the Shanghai-Shanghai Yangtze River Bridge is arranged as a 3 × 112m, 3-span simply supported steel truss girder bridge, of which pier Nos. 32 and 31 are located on the river surface and Pier No. 31 connects the main waterway cable-stayed bridge and Pier No. 33 is located on the levee In front of the bank of the river, Pier 34 is located behind the embankment and connects the prestressed mixed soil simply supported girder at the South Bank Collective Railway. Through the modeling and calculation of the load of steel trussed girder and No. 33 pier under the most unfavorable conditions in construction, the overall bending resistance of 33 piers is reinforced according to the load requirements, and the top 4 internals After the steel girder, two movable girder cranes are installed at the top of the steel girder, and the girder is erected and erected at the same time on both the north and south sides of the top pier of No. 33 pier. This symmetrical cantilever erection program saves on engineering costs, increases engineering efficiency, and is safe and reliable. The innovative use of large cantilever symmetric erection technology in the construction of simply supported steel truss girders for the Shanghai-Shanghai Yangtze River Bridge can provide reference for the construction of similar projects.