天津地下直径线最大坡度研究

Research on the Maximum Grade of Tianjin Underground Zhijing Line

研究目的:天津地下直径线是天津西站和天津站间直通的地下联络线,是天津铁路枢纽的重要组成部分,是津秦客运专线转京沪高速铁路的便捷通路。该线位于天津市繁华的海河经济圈内,沿途控制点繁多,最大坡度的选择对工程建设及运营期间的投资和安全影响均很大。故研究确定最大坡度对有效控制建设投资、减小工程实施难度和确保运营安全都非常必要。研究结论:23‰坡度方案技术可行,经济合理,天津地下直径线推荐采用23‰的最大坡度。

Research purposes： Tianjin underground Zhijing line is the connecting line between Tianjin West station and Tianjin station and an important part of Tianjin railway terminal as well as a shortcut of passenger dedicated line from Tianjin to Qinhuangdao and high - speed railway from Beijing to Shanghai. The line is located in flourishing Haihe economic zone in Tianjin with many controlled spots, so the construction investment and traffic safety are affected very much by the maximum grade. Therefore, it is very necessary to do study on determining the maximum grade for the purposes of controlling the construction investment efficiently, reducing engineering difficulties and ensuring the safety of railway operation. Research conclusions ：The scheme of 23‰ grade is feasible in technology and reasonable in economy, so it is suitable for Tianjin underground Zhijing line to adopt 23‰ maximum grade.