福厦客专道路交叉连续箱梁现浇支架设计与施工

Cast-in-place Supports Design and Construction in Road Junction Continuous Box Beams of Fu-Xia PDL

以新建铁路福州至厦门高速客运专线跨国道现浇支架为依托,对结构的屈曲分析、支架立杆、轴向压力等进行了计算分析,确保结构安全性,同时对条形基础提出了一次浇筑、预应力加载、分段拆除等设计和施工理念,并在实践中取得了良好的应用效果,可为其他类似现浇支架的设计、施工提供借鉴。

In light of the cast-in-place supports construction in the newly built Fuzhou-Xiamen high-speed PDL crossing national highway as a basis, this article mainly elaborates on the design and checking of cast-in-place supports. Important study has been carried out in the key parts of structure, analysis is made on structure flexure, and computing analysis is made on support poling and axial compressive force, which can ensure structural safety. Meanwhile, the design and con- struetion of strip footing adopt the concepts of one casting, prestress loading and sectional demolition in place of the old ide as, whieh have been well applied in practice and can be reference to similar east-in-place supports.