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1前言合九线北起安徽省合肥西站,南至湖北省孔垄站N1岔首与京九线接轨,穿越肥西、庐江、安庆、黄梅等11个市县,联接鄂、皖、赣3省,是皖西南地区重要的铁路通道。随着运量的增加及列车速度的提高,通车后线路的纵断面发生了较大变化,各种道床及路基病害陆续出现,部分钢轨及轨枕等设备出现伤损,导致线路几何状态控制困难,影响行车安全,仅靠普通的线路维修很难解决以上问题,故必须对全线进行全面的线路中修。
1 Foreword The Hejiu line starts from Hefei West Railway Station in the north of Anhui Province and the south of Kongluo Station in the south of the junction connects with the Beijing-Kowloon Line to the north of 11 cities and counties such as Feixi, Lujiang, Anqing and Huangmei, connects Hubei, Anhui and Jiangxi 3 provinces, is an important railway corridor in southwestern Anhui. With the increase of traffic volume and the increase of train speed, the vertical section of the line has changed greatly after opening the traffic. A variety of road beds and roadbed diseases have appeared one after another, some of the rail and sleeper equipment damage, resulting in the difficulty of line geometry control, Affect traffic safety, it is difficult to solve the above problems only by ordinary line maintenance, it is necessary to conduct a comprehensive line repair in the whole line.