钢筋混凝土系杆拱桥拱肋吊装施工技术研究

摘要

Compared with the steel tube arch, the volume and weight of the reinforced concrete arch rib are big and this brings about the difficulties of hoisting the arch rib. Especially the more work should be done and there are lots of risks in making design of the load-bearing support for hoisting the arch rib section by section and linear control when conducting closure. Taking the hoisting the arch rib of one reinforced concrete tied arch bridge as an example, this paper researches and discusses the support design and linear control, and puts forwards the key control points, providing the reference to the similar bridge construction.%钢筋混凝土拱肋与钢管拱相比体积和质量较大,这就给吊装施工带来更大的难度,特别是拱肋分段吊装承重支架的设计、合龙时的线形控制等方面增加了大量的工作和风险性.根据某特大桥主桥系杆拱钢筋混凝土拱肋吊装施工的实例,从支架的设计和线形控制两方面进行研究,提出控制要点,为类似桥梁施工提供借鉴.