Research purposes:The schematic design of railway bridge survey directly determines the quality of construction drawing.The survey tasks cannot be finished with the disadvantages such as short construction period and few staff.Through the research algorithm,the problems of the schematic design for railway bridge are solved,and the technical support is provided for the automatic processing of bridge survey information.Research conclusions:(1)The regional code is introduced to describe broken chain,breaking rule that the broken chain can not be on bridge.(2) The method of curve layout for continuous beam is put forward,and the iterative structure is added to curve layout calculation process.So the bridge with multiple curves can be laid on the curve for once.(3)The span arrangement is abstracted as an accumulated counter,which speeds up the scheme comparison.(4) The pier coordinates can be evaluated by using plane drawing of railway route,which makes seamless joint between railway bridge field and railway line field come true.(5)The problem of overlapped characters is solved by the recursive algorithm.(6) The optimized scheme in the system is reasonable and feasible.The system has the advantages of fast calculating speed and standardized output,and it can be applied to large-scale railway bridge survey and design effectively.%研究目的:桥梁勘测方案设计的好坏直接决定施工图的质量,在工期短、人员少的不利局面下,不能保质保量地按时完成勘测任务.本文通过研究铁路桥梁勘测信息处理系统,旨在解决方案设计时遇到的难题,为实现勘测信息自动处理提供技术支持.研究结论:(1)引进区域码描述断链,打破断链不能上桥的规定;(2)提出连续梁在曲线上布置的方法,在手算弯道布置计算流程中增加迭代过程,实现了长桥在多个曲线上的一次性布置;(3)将孔跨布置过程抽象为计数器累加计算,加快了方案比选的进度;(4)由线路平面图反算墩台里程坐标,完成了桥梁与线路专业的无缝过渡;(5)设计递归算法解决绘图时文字重叠问题,减少了人工修改;(6)该系统优化的方案是合理的、可行的,其计算速度快、成果输出规范,可以较好地应用于大规模铁路桥梁勘测设计中.
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