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针对既有隧道改建为城市轨道交通线路的具体实践,建立以线路平面和纵断面设计控制点为约束条件,改建量平方和最小为目标函数,采用拉格朗日乘子法进行优化设计的方法,初步确定线路位置;建立线路贯通性与限界适应性分析的指标体系,并以此为基础,编制限界自动分析软件,确定最佳的线路设计位置,从而解决了既有隧道工程改用作城市轨道交通线路时线路贯通性和限界适应性的分析问题.
Aiming at the concrete practice of reconstructing the existing tunnels into urban rail transit lines, this paper establishes a method of optimizing design based on the Lagrange multiplier method, taking the control points of the line plane and the longitudinal section as the constraint conditions and the minimum sum of squares of reconstructions as the objective function , Initially determine the location of the line; the establishment of lines of connectivity and adaptive boundary adaptive index system, and as a basis for the preparation of automatic boundary analysis software to determine the best line design location, thus solving the existing tunnel project for the city Analysis of Line Continuity and Bounded Adaptability in Rail Transit Lines.