毕设基本摘要
摘 要
为适应我国铁路建设高速发展的需要，铁路中小跨钢筋混凝土简支梁桥以其构造简单、造价低廉、便于施工及养护维修等优点得到越来越广泛的应用。基于以上钢筋混凝土简支梁桥的优点，同时，本次设计前对一些既有线路状况进行了调查并查阅了近年来大量铁路桥梁设计资料，并经过经济技术方案论证，最后确立中小跨度简支梁桥作为本次桥梁设计类型。
本次毕业设计涉及的内容有桥台设计，梁体设计及检算，桥墩设计及检算，基础设计及检算，支座设计等，其中梁体设计及桥墩设计涉及的知识面较广，能充分培养自己所学知识的综合应用能力，因此梁体设计和桥墩设计作为本次毕业设计的重点，而桥台和支座两项设计目前在各国均已实现标准化设计，为简化设计任务量，本毕业设计没有对桥台和支座进行单独设计和检算，仅根据简支梁桥的特点及有关设计资料直接套用有关标准设计图，这也是适应目前工程实践发展的需要。
关键词：桥台设计；梁体设计及检算；桥墩设计及检算；基础设计及检算
ABSTRACT
In order to adapt to the needs of the development of high-speed railway construction in our country, the railway medium and small span simply-supported reinforced concrete bridge, with its simple structure, low cost, convenient for construction and maintenance advantages to get more and more widely used. Reinforced concrete simply supported girder bridge based on the above advantages, at the same time, this design has carried on the investigation on some existing lines before and refer to the railway bridge design in great quantities in recent years, and through economic and technical scheme comparison, the final establishment of medium and small span beam bridge type as this bridge design.
The contents related to the graduation design of abutment design, beam design and inspection, bridge pier design and check computation, foundation design and inspection, bearing design, etc., the beam body design and bridge pier design involves a wide range of knowledge, can fully develop their knowledge in integrated application ability, therefore the girder and pier design as the focus of this graduation design, and the abutment and bearing two design at present in both countries has been standardized design, to simplify the design task, this graduation design is not to separate design and the abutment and the bearing is checked, only according to the characteristics of the simply supported girder bridge and the relevant design data directly to the standard design, which is adapt to the needs of the development of engineering practice at present.
Keywords: abutment design the beam body design. the design and foundation design is checked . piers is checked is checked
设计跨径：5×18.5m
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