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近年来修建长大旱桥较多,桥梁用地宽度在设计中缺乏统一标准,问题较为突出。本文从桥梁结构本身占地和桥梁结构对农作物雨露、日照的遮蔽影响等方面探讨了桥梁用地宽度的确定方法,文中建议用日照遮蔽率确定桥梁用地宽度,在铁道部(83)基设字第249号文公布的“关于铁路特大桥、大桥、中桥永久用地宽度的暂行规定”中已予采纳。现刊登本文,以供设计人员借鉴,并在实践中不断探索,修改完善。
In recent years, there are many long and dry bridges to be built, and the width of the land for bridges lacks uniform standards in the design. The problems are more prominent. This paper discusses the method of determining the width of bridge land from the area of bridge structure itself and the effect of bridge structure on crop rain and shadowing of sunshine. In this paper, it is suggested that the width of bridge land should be determined by sunshine screening rate. No. 249 published “on the railway bridge, bridge, the width of the permanent bridge width of the Provisional Regulations” has been adopted. Now published in this article, for designers to learn from, and in practice continue to explore, modify and improve.