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一、问题的提出 拱桥在我国历史悠久。解放后拱桥发展很快,在公路桥梁中约占60%以上。今后,发展拱桥仍有重要的意义。 由于拱桥的侧向推力大,在非岩石地基上常常配以庞大的桥台,尤其当桥台较高时,庞大的桥台常成为影响拱桥工期和造价的一个主要因素。减轻上部结构的重量。可以使桥台体积小些,近十多年来先后出现了双曲拱、桁架拱、刚架拱等较轻型的结构型式,但仍然是推力结构,桥台体积还是较大。
First, the issue put forward Arch bridge has a long history in our country. After the liberation of the rapid development of the arch bridge, highway bridges account for about 60%. In the future, the development of arch bridges is still of great significance. Due to the large lateral thrust of the arch bridge, huge abutments are often used on non-rock foundations. Especially when the abutment is high, the huge abutment often becomes a major factor affecting the construction period and cost of the arch bridge. Reduce the weight of the superstructure. Can make the abutment smaller, more than a decade has appeared double arch, truss arch, rigid frame arch and other lighter type of structure, but still the thrust structure, abutment volume or larger.