一、前言山岳地区的新线铁路选线,是一件既复线而又有意义的工作,在理论上讲是要选择控制点间的最短距离与平剖面变化最小的线路,但事实上由于当地地形与地质条件的限制,故往往牵联着许多复杂的因素,如将来铁路筑成后,路堤、路堑的边坡稳定条件,大型建筑物基底土的允许承载力问题,限制坡度与最 I. INTRODUCTION The new railway line selection in the mountainous area is a meaningful and meaningful task. In theory, it is necessary to select the shortest distance between control points and the line with the smallest change in the flat section. In fact, Terrain and geological conditions, it often involves many complicated factors, such as the railway construction in the future, the stability of the slope of the embankment, cutting slope, the allowable bearing capacity of large-scale building foundation soil, the limit of slope and the most