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根据铁道部第四次铁路大提速的要求和上海铁路局2001年3月2日召开的京九线提速会议精神,京九线将全面提速至140～160km/h,这样京九线K821+500～K822+200段的既有半径986m的上、下行曲线不能满足要求,必须对其进行改造,使之能满足新的提速要求。由于工期紧,只有短短的三个月时间,而改造后的下行线则基本上为新铺线路。如何确保新路基及轨道的稳定,使之能满足速度达到140km/h列车的运行条件是我们面临的新课题。
According to the requirements of the fourth railway speed increase by the Ministry of Railways and the spirit of the Beijing-Kowloon Railway Line Speeding Meeting held by the Shanghai Railway Bureau on March 2, 2001, the Beijing-Kowloon Railway will speed up to 140 ~ 160km / h in an all-round way. Thus, the Beijing-Kowloon Line K821 +500 ~ K822 + 200 section of the existing radius of 986m on the downlink curve can not meet the requirements, it must be modified so that it can meet the new speed requirements. Due to tight schedule, only a short period of three months, while the transformation of the downlink is basically a new shop line. How to ensure the stability of the new roadbed and orbit so that it can meet the operating conditions of the train at a speed of 140km / h is a new issue we are facing.