结合北京地铁9号线运营过渡方案的运营现状，对终点折返站郭公庄站和临时折返站北京西站的临时折返方案布置图以及作业流程、折返进路、时间参数等进行分析，计算其折返能力，进一步验证北京地铁9号线郭公庄站至北京西站运营过渡方案的可行性。

Considering the current transitional operation program of Beijing subway line 9, the article analysed the turnining-back scheme between Guogongzhuang turning-back terminal and the Beijing West Railway temporary turning-back station, and the operation process and turning-back route and time parameters, and then figured out the capacity of turning-back stations, thereupon to verify the transitional operation program of Beijing subway Line 9.