中文摘要：

针对复杂山区线路-结构物-环境耦合约束条件下铁路线路优化问题,提出先生成多样化构架线、再优选并拟合成线位的两阶段法。将空间距离拓展为包含线路方案的工程、运营、环境影响等代价的广义距离,引入图像学中距离变换的概念求解最短路径;再将线路-结构物-环境约束分为静态固定型和耦合伴生型两类,分治于距离变换的前中后三个阶段;设计动态自适应邻域模板和双向扫描策略,确保复杂约束条件下生成线路方案群;顾及约束,将构架线拟合为最终线路方案。实践证明,该方法在复杂环境下,无需预先给定控制点初始分布,可自动生成满足线路-结构物-环境复杂耦合约束的优化线路方案群。

英文摘要：

In response to railway location that automatically considers coupling constraints of alignment,structures and environment,a two-phase method was proposed：generating various optimizing skeleton paths in the first phase and refining them to the alignments in the next phase.Firstly,the spatial distance was expanded to generalized distance which comprises the comprehensive cost of engineering,operation and environmental impact.The concept of distance transform in iconography was employed to search the shortest path.The constraints of alignment,structures and environment were divided into two types of static fixed constraints and dynamic coupling constraints.All these constraints were divided and conquered in pre-processing scanning and post-processing stages.Dynamic adaptive neighborhood template and bidirectional scanning strategy were put forward to ensure the generation of alignments under complex constraints.Lastly,the above paths were refined to final alignment scheme that considered constraints.Case studies proved this methodology can automatically generate groups of optimizing alignments while satisfying the coupling constraints of alignment structures and environment in complex environment,without presetting the initial control points.