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修建一条公路要跨越沟谷、小型河流、人工渠道等,因此修建一些用途不同的构造物是必然的,最常见的排水构造物就是小桥涵。小桥涵作为公路的一个重要组成部分,在工程量上占着很大比重。小桥涵设计对整条公路的造价和使用质量也起很大作用。这就要求小桥涵的设计和布置要尽可能的合理,以满足排水、车人通行需要。现结合实践经验,对高速公路的小桥涵的位置与形式选择原则及计算方法予以介绍,并提出设计要点及注意事项。
It is inevitable to build some structures with different uses to construct a highway to cross the valleys, small rivers and artificial channels. The most common drainage structures are bridges and culverts. Small bridges and culverts as an important part of the highway, accounting for a large proportion of the project volume. The design of small bridges and culverts also play a large role in the quality and quality of the entire highway. This requires the design and layout of small bridges and culverts to be as reasonable as possible to meet the drainage needs of traffickers. Now combined with practical experience, the selection of the location and form of small bridges and culverts and calculation methods are introduced, and the design points and precautions are proposed.