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在山区典型的Ⅴ型河谷上,由于谷深流急,当地质情况较好时,大跨拱桥不仅节约钢材,圬工数量也省,且拱桥承载力大,耐久性好,与陡峻的地形相配合,尤为壮观。因此拱桥在山区得到广泛采用。为适应山区建桥,1975年我们进行了拱桥转体施工工艺的研究,并于1977年完成第一座跨径为70m的箱型肋拱转体施工试验桥(照
In the typical Ⅴ type of valley in the mountain area, due to the deep current and rapid flow in the valley, when the geological conditions are good, the long-span arch bridge not only saves the steel, but also has a large number of masonry and large bearing capacity, good durability and steep terrain With, especially spectacular. Therefore, the arch bridge is widely used in the mountains. In order to adapt to the construction of bridges in mountainous areas, in 1975 we conducted a research on the swivel construction technology of the arch bridge and completed the first swivel construction test bridge of box rib arch with a span of 70m in 1977