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以渝怀增建二线为例,从渝怀增建二线选线全过程的实践探讨既有线增建二线综合选线。宏观方案应结合项目的功能定位研究走廊带与相邻线资源共享、实现区段客货分线、线间修建联络线方案以及速度目标值方案的确定;局部方案要充分考虑重要的政治经济据点,复杂的越岭隧道、大河桥渡,重大不良地质、特殊岩土,矿山、采空区以及环境敏感点对线路走向方案的影响,通过线路左右侧位置的选择,站位设计的灵活应用等诸多方面来进行方案研究,最终确定出安全、经济、合理的最优方案。
Taking Huaihua Second Line as an example, this paper discusses the whole process of the second line selection of Yu-Huai from the construction of Yu-Huai and explores the second-line comprehensive route selection of existing line. The macro program should be based on the functional orientation of the project to study the sharing of resources between the corridor belt and the adjacent line so as to realize the division of passenger and cargo sections of the railway line, the plan of connecting lines between lines and the determination of the target value of speed. The local plan should give full consideration to important political and economic positions , Complicated cross-country tunnels, large river bridges, major adverse geology, special geotechnical mines, mined-out areas and environmentally sensitive points on the line direction plan. Through the selection of location on the left and right side of the line, flexible application of station design, etc. Many aspects of program research, and ultimately determine the safe, economical and reasonable optimal solution.