小半径超限坡在铁路疏解区选线的应用-《高速铁路技术》

文章信息/Info

Title:: Application of Narrow Radius and Super Limited Gradient in Route Selection in Railway Relief Area

Author(s):: LAI Shu-ming; Chongqing Survey and Design Research Institute of CREEC, Chongqing 400023, China

摘要:: 新建铁路在分方向疏解引入既有铁路时,往往速度达不到路段设计目标值,如果线路设计仍然采用路段最小曲线半径和限制坡度,工程投资将产生很大的浪费。如何在设计中充分考虑实际行车速度和行车的方向,采用与其相匹配的曲线半径和坡度,使线路设计既满足运输需求又节省投资,是铁路选线时值得思考的问题。文中通过2个铁路选线实际案例,具体分析了铁路疏解区采用小半径和超限坡的客观条件,提出在铁路疏解区,可以根据行车速度和行车方向,合理采用小半径和超限坡,解决工程的实际需要。

Abstract:: If the new line is connected with existing railway in the directional relief area, generally the speed can not reach the design speed in the section. If the minimum radius of curve and limited gradient in the section is adopted in the design of the route, a great waste occurs in engineering investment. It is worth thinking how to consider fully the actual running speed and running direction in the design and adopt the corresponding radius of curve and gradient to make design of the route not only meet transport demand but also save the investment. In this paper, through two actual railway route selection cases, an analysis is made on the objective conditions of using narrow radius and super limited gradient in the railway relief area. According to analysis resulting, it is put forward that narrow radius and super limited gradient may be used reasonably in the railway relief area according to running speed and running direction to resolve the actual demand of the engineering.