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有鉴于在大跨桥梁中悬索桥与斜张桥均有飞跃发展,已分别接近2000m与900m,而拱桥则仍滞留在518m以下的水平上。作者认为拱桥也可有其发展前途,于是对它进行了分析研究,感到如能认清它的特点,建立起完善的设计构思,自不难从设计、施工、经济美观等方面找到它的发展途径,超过现在记录518m是可行的。本文分三讲先后介绍概述、设计、施工、经济与结论。在第一讲概述中介绍概况、设计构思的由来、大跨拱桥的特点、分析与对策、小结。
In view of the rapid development of suspension bridges and inclined bridges in large-span bridges, they have been approaching 2000m and 900m, respectively, while the arch bridges still remain below 518m. The author believes that the arch bridge can also have its development prospects, so it has been analyzed and studied, feel that if we can recognize its characteristics, establish a sound design concept, it is not difficult to find from the design, construction, economic and aesthetic aspects of its development Ways, more than the current record 518m is feasible. This article is divided into three stresses introduction, design, construction, economy and conclusion. Introduced in the first lecture overview, the origin of design concept, characteristics of large span arch bridge, analysis and countermeasures, summary.