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一般公路中的桥梁通常以正交布设为主,但为了满足公路技术标准,应使路线线形流畅、连续,部分桥梁须服从路线走向,不可避免的会出现一些斜交桥梁,因此在公路桥梁设计中,斜交桥梁的桥型布置、结构形式的选择是否合理将对桥梁施工难度、结构耐久性及工程造价有较大影响。本文根据多年从事低等级公路中小跨径桥梁设计工作的经验,总结了一些中小跨径斜交桥的布设方法,并且指出应根据桥梁所处位置的路线线形、斜交角度、河流情况等因素,通过方案比较,选择合适的桥型布置,从而使斜交桥梁设计合理、施工方便、经济美观。
In general, the bridges in the highway are usually laid in an orthogonal arrangement. However, in order to meet the technical standards of the highway, the alignment of the alignment should be smooth and continuous. Some of the bridges must obey the direction of the alignment and inevitably there will be some skewed bridges. Therefore, In the bridge layout of skewed bridges, the reasonable choice of structure forms will have a great impact on the difficulty of the bridge construction, structural durability and project cost. Based on the experience of many years working on design of medium and small-span bridges in low-grade highways, this paper summarizes the layout of some medium- and small-span bridges, and points out that according to the alignment, skew angle and river conditions of bridges, Through the program comparison, select the appropriate bridge layout, so that the skewed bridge design is reasonable, convenient construction, economic and beautiful.