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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 diameter line is the underground communication line between Tianjin West Railway Station and Tianjin Station. It is an important part of Tianjin Railway Terminal and a convenient access to the Jing-Qin High-speed Railway. The line is located in the bustling Haihe Economic Circle in Tianjin. There are many control points along the route. The choice of the maximum slope has a great impact on the investment and safety during the construction and operation of the project. Therefore, research to determine the maximum slope of the effective control of construction investment, reduce the difficulty of implementing the project and ensure operational safety are necessary. Research conclusions: The 23 ‰ gradient scheme is feasible and economical, and the maximum gradient of 23 ‰ is recommended for Tianjin underground diameter line.