一、重新研究拱桥架设方法的原因我国过去修建大跨度钢筋混凝土拱桥时,大多采用满堂支架法、钢拱架法和纵向悬吊法(天线吊装)等。这些方法比之用悬臂法架设大跨度梁式桥来,费用要高得多,主要问题是需要的临时设施和施工用材多(如支架、模板、吊具等),因而使大跨度钢筋混凝土拱桥的发展受到了一定限制。但是,由于钢筋混凝土拱桥能够使拱肋截面不发生拉应力,所以对混凝土而言,拱桥是理想的结构型式;还因为拱的优美外形,工程 First, to re-study the reasons for the erection of arch bridge In the past, China built the long-span reinforced concrete arch bridge, most of them use the full support method, steel arch method and vertical suspension method (antenna lifting). These methods are much more expensive than erecting long-span beam bridges using cantilever methods. The main problem is the need for more temporary structures and materials for construction (such as brackets, stencils, spreaders, etc.) and the development of long-span reinforced concrete arches Subject to certain restrictions. However, since the reinforced concrete arch bridge can make the rib section of the tensile stress does not occur, so the concrete, the arch bridge is the ideal type of structure; also because of the beautiful arch shape, engineering