【摘要】 拱桥承载力大,耐久性好,造型优美。但由于施工费用昂贵,降低了拱桥的竞争能力。 为使拱桥架设简便、设备精简,节省施工用钢量,于一九七六年曾试用“拱桥转体施工”的方法,将拱网分为两个半跨,分别于两岸利用地形预制拱箱(或拱桁),利用结构本身和工具结构组成扣、锚体系,借助于预设的聚四氟乙烯环形滑道(或用二硫化钼作润滑剂的球面铰加钢轮环道),用卷扬机牵引,将拱体旋转合拢。 通过一些施工实践与试验研究,证明“拱桥转体施工”具有经济、快速,安全等优点。 本文对拱桥转体施工的基本方法,设计要点,试验研究,及技术经济比较,结合工程实践作了简明扼要的论述。更多还原

【Abstract】 Arch bridges have high load-bearing capacity, good durability and graceful shapes, But their application is limited due to high construction cost, In order to render a simple and convenient erection with less equipments and steel centerings, the "swing-body" method was tried out in 1976, The arch ring was divided into two half-spans and, utilizing the local topographical conditions, the hollow arch ribs (or arch trusses) were prefabricated on the two opposite banks, Using the buckleanchor system formed by the structure of arch bridge itself to-gether with steel construction units and with the aid of preinstalled circular slides made of ptfe, or of spherical hinges (lubricated by molybdenum disulfide)and steel roller wheels plus circular track plates, the two half-spans of arch ring were swung around to join with each other by winches, Through a number of actual constructions and experimental studies, the "swing-body" method for arch bridge construction has been proved to be economical, speedy and safe, Based on engineering practice, a brief account about the basic ways, design essentials, experimental studies and technic-economical comparisons of the above method is given in this paper.更多还原