Abstract：Research purposes：The track gauge in diverging line plays an important role in the geometry design of small turnouts and among which, the maximum gauge caused by structure widening is an important item. Structure widening is needed as theoretical basis for laying and maintenance of turnouts. The calculation methods presented in this paper for structure widening can offer the reference to turnout design.
Research conclusions：Through the research on track gauge widening rules of small turnout and comprehensive consideration of the curve geometry, type of blade, gauge at entry of turnout, gauge at toe of blade, gauge in diverging track, etc, the analyses of the reason for structure widening in switch panel are made, the calculation methods for structure widening in any case are put forward, the definition on structure widening is given and a general calculation program for turnout structure widening is developed.
王 军，李 悦. 铁路道岔轨距加宽与构造加宽研究[J]. 铁道工程学报, 2009, 26(3): 20-22.
WANG Jun,LI Yue. Research on the Widening Track Gauge and Structure Gauge of Railway Turnout. 铁道工程学报, 2009, 26(3): 20-22.
2009, Vol. 26 
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