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千厮门大桥是公轨合建的钢桁梁斜拉桥,恒载较一般斜拉桥大,且斜拉索为单索面布置,其最大张拉力超过10 000kN,采用平行钢绞线斜拉索。超大吨位的斜拉索在施工过程中索力调整困难,该文针对性地提出斜拉索一次张拉到位的施工方案,可避免斜拉索索力调整,降低了施工风险和难度。通过施工阶段有限元仿真分析,对一次张拉到位方案的可行性进行验算,并提出了合龙相关措施。
The Qianzian Gate Bridge is a steel truss cable-stayed bridge with a common track. The dead load is larger than that of a typical cable-stayed bridge and the stay cables are arranged in a single cable plane. The maximum tensile force exceeds 10 000 kN. Cable. In the process of construction, the cable tension adjustment is very difficult because of the large tonnage of stay cables. This paper puts forward the construction plan that the stay cables can be tensioned in the first place, which can avoid the cable force adjustment of the stay cables and reduce the construction risk and difficulty. Through the finite element simulation analysis during the construction stage, the feasibility of a tensioning in place program is checked and the relevant measures of closing dragon are put forward.