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一、单开道岔 我国铁路线路铺设道岔八万多组,其中单开道岔约占95％以上。目前正线铺设的普通单开道岔基本上是定型设计的道岔,其整体设计和零部件结构比各种旧、杂型道岔有较大的改进,使用情况基本良好。但由于道岔结构的不完善,同时列车通过正线道岔不限速,加之养
First, a single turnout China’s railway line laying more than 80,000 turnouts, of which about a single turnout accounted for more than 95%. At present, the common single-turnout laid on the line is basically a turnout with a fixed design. The overall design and the structure of the components are greatly improved compared with those of the old and the miscellaneous turnouts, and the use situation is basically good. However, due to the imperfect structure of the turnout, at the same time the train passes the speed limit of the positive turnout,