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本设计采用的是装配式预应力简支箱梁桥，设计公路等级为Ⅱ级，桥面净空为9+2×1.0m，双向两车道，桥梁跨径为2×40m，下部采用桩接柱的形式，桥梁按不通航的要求设计。
本设计主要包括三个部分：第一部分是桥梁方案的比选阶段，主要为桥梁的水文计算以及选出最优的设计方案；第二部分是桥梁上部结构的计算阶段，主要包括主梁的截面设计、配筋计算以及行车道板计算等；第三部分是桥梁下部结构的计算阶段，主要包括盖梁、墩柱和钻孔灌注桩计算等。
关键词：桥梁设计、结构计算、预应力简支箱梁
ABSTRACT
This design is adopted simply supported prestressed box girder bridge,gradeⅡroad design,the deck net is 9+2×1.0m,two-lane two-way,the bridge span is 2×40m,the lower part of the bridge is adopted pile connecting with column,the requirements of the bridge designed with non-navigable
This design has three parts.The first part is the comparison and selection phase of the bridge program,which focus on the calculation of the hydrology and select the best design.The second part is the calculation phase of the bridge superstructure,which includes the main beam section design,calculation and carriageway plate reinforcement calculation.The third part is the calculation phase of bridge substructure,which includes coping calculation,pier column calculation and bored pile calculation,etc.
Key words:bridge design；structural calculation；simply supported prestressed box girder bridge；
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