大同至西安客运专线最大坡度的选择

研究目的:大同至西安客运专线所经霍州至洪洞段地形陡峭,须翻越霍山山脉。为有效减少24.7 km的不良地质隧道对铁路建设、运营安全的影响,对大西客专所采用的最大坡度值进行了研究。研究结论:针对霍山越岭地段20‰、25‰、30‰三个最大坡度方案进行论述和技术经济比选,以及对国内250～300 km/h动车组在长大坡段上的加速、制动性能进行模拟。在保证运营安全的前提下,采用30‰的最大坡度可取消霍山越岭长大隧道,并有效地节省工程投资。合理提出30‰为大西客专局部困难地段的最大坡度。

Research on Selection of Maximum Gradient for Datong-Xi'an Passenger Dedicated Railway

Research purposes: The section between Huozhou-Hongdong of Datong-Xi’an Passenger Dedicated Line had to cross the Huoshan mountain chain with steep terrain.In order to effectively decrease the negative impact of 24.7 km long tunnel with unfavorable geological condition on the railway construction and operation,the research was done on the maximum gradient value for the railway. Research conclusions: The discussion and technical and economic comparison were made for three schemes of 20‰ gradient,25‰ gradient and 30‰ gradient in the Huoshan crossing section,and the simulations of acceleration and breaking performances of the 250-300 km/h EMU running on long slope were made.If the 30‰ gradient was used,the Huoshan long slope tunnel could be cancelled and the construction investment could be saved.So the 30‰ gradient was determined as the maximum gradient in some difficult sections of this railway.