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农桥是满足农业生产和交通需要修建的桥梁,其型式主要分为拱桥和板桥两大类,跨径较小,拱桥净跨30m以下,板桥净跨8m以下。新中国成立以来,为保证沟河道路畅通,在支、斗、农沟上修建了大量的农桥,为我国农业和农村经济的发展发挥了重要作用。1 农桥现状及存在问题20世纪六七十年修建的桥梁多砖石拱桥,砖墩或石墩板桥,混凝土双曲拱桥,荷载标准为汽—6级:改革开放以来又修建了大量的混凝土桥涵,主要型式为灌柱桩板桥,装配式混凝土拱桥,现浇拱桥,混凝土盖板涵,以及砖墩混凝土挂板桥,荷载标准汽—8级以下。
Nongqiao is a bridge that meets the needs of agricultural production and transportation. Its type is mainly divided into two major categories: arch bridge and slab bridge. The span is smaller. The net span of arch bridge is below 30m and the net span of bridge is below 8m. Since the founding of New China, a large number of agricultural bridges have been built on the branches, dredges and ditches to ensure the smooth flow of ditch rivers and play an important role in the development of agriculture and rural economy in our country. A current situation and problems of agricultural bridges Bridge built in the 1960s and 70s Multiple brick stone bridges, brick or stone piers and concrete double-curved arch bridges with a load standard of steam of -6 level: a large number of Concrete bridges and culverts, the main types of filling piles and slab bridges, prefabricated concrete arch bridge, cast-in-place arch bridge, concrete cover culvert, and brick concrete bridge, load standard steam below -8.