钢箱提篮拱自锚式扣挂体系及扣挂法施工技术研究

Construction Technology Research on Self-anchored Buckling System and Buckling Method for Steel Box Basket Arch

本文依托大连普湾十六号路跨海桥工程主桥次边跨拱肋安装施工,结合桥梁自身结构特点,综合考虑成本、工期、高空作业安全风险、施工控制难易程度、大型安装设备的配备等因素,对扣挂体系的总体结构、锚点细部构造进行施工阶段模拟和主要构件的受力分析;对安装段的划分、吊装方式、扣挂法施工工艺、拱肋安装姿态调整措施等方面进行研究。充分利用主体结构建立自锚式扣挂体系,合理安排施工顺序,施工工艺、具体措施满足施工需要。自锚式扣挂体系及其扣挂法施工技术在本桥的成功应用,体现出其节约施工成本、降低施工控制难度、施工快速紧凑、可操作性强的巨大优势,可为类似工程提供参考。

The paper relied on the installation and construction of main bridge and secondary side span arch rib of Dalian Puwan No. 16 Road sea crossing bridge project. It combined with the structural characteristics of the bridge itself, considering the factors of cost, construction duration, safety risk of high-altitude operation, difficulty of construction control and allocating of large-scale installation equipment, the overall structure of the buckling system and the detailed structure of anchor point were simulated in construction and the stress analysis of main components was conducted. The division of installation section, hoisting method , construction technology of buckling method and adjustment measures of arch rib installation attitude were studied. The self-anchored buckling system was established by making full use of the main structure. The construction sequence was arranged reasonably. Both of the construction technology and specific measures could meet the construction needs. The successful application of self-anchored buckling system and its buckling construction technology in this bridge showed its great advantages of saving constniction cost, reducing constniction control difficulty, speeding and compacting construction and operating smoothly. The construction scheme could provide reference for similar projects.