Abstract：Abstract：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.
2017, Vol. 34 
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