克服大高差铁路线路创新设计的探讨

西南山区地形起伏大,地势陡峻,高差悬殊,给铁路设计带来了较大困难。本文以西南山区某铁路设计为研究背景,为克服大高差,结合最新颁布TB10098-2017《铁路线路设计规范》中关于线路纵坡折减的新规定,文章提出了一种创新设计方法:针对线路紧坡地段,首先尽量选用最大坡度,适当加大隧道断面积,以减小纵坡减缓值,最大限度地用足坡度,达到缩短线路长度和节省工程投资的目标。此创新设计思路和方法可为类似铁路选线设计提供参考。

Discussion on Innovative Design of Railway Line Overcoming Great Elevation Difference

The southwest mountain area is characterized by undulated landform,steep terrain and high elevation difference,which brings great difficulties to railway design.Based on the research background of a railway design in the southwest mountainous area,in order to overcome the large elevation difference,and combined with tlie new regulations on the line vertical slope reduction in the newly-issued"Code for Design of Railway Line"(TB10098-2017),an innovation design method is presented that for the tight slope section of the line,it is necessary to try to select the maximum gradient first,and increase appropriately the sectional area of the tunnel SO as to reduce the longitudinal slope slowdown value and maximize the gradient,which can shorten the line length and save tire engineering investment.The innovative design idea and method can provide reference for route selection design of similar railway ideas.