石家庄铁路枢纽改造中正定站改造过渡方案优化

京石客运专线石家庄铁路枢纽改造工程引起的正定站改造，由于原站改过渡方案设计，对上、下行方向产生通过能力降低、增大施工作业量和列车降速运行等影响，为此提出保留上行Ⅱ道分割信号机，下行通过进路上侧向道岔改为曲线的优化站改过渡方案，从而减少施工对运输的干扰，提高施工期间京广线通过能力。

Transition Scheme Optimization of Zhengding Station Reconstruction During Reconstruction of Shijiazhuang Railway Hub

For Zhengding Station reconstruction caused by Shijiazhuang railway hub reconstruction on Beijing-Shi-jiazhuang PDL,and because of the influences occurred by original transition scheme of station reconstruction,whichinclude the passing capacity reduction in up and down direction,the increase in the amount of construction work andthe speed of train slowing down,etc.,this paper puts forward the transition optimization scheme of retaining the Ⅱ trackpartition signal in up direction,and changing the upside turnout of passing route in down direction into curve.The optimization scheme could reduce construction interference on transportation and increase the passing capacity of Beijing-Guangzhou line during construction period.