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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 purposes: From Datong to Xi’an Passenger Dedicated Line Huozhou to Hongdong section of steep terrain, to be over the Huoshan mountains. In order to effectively reduce the impact of adverse geological tunnel of 24.7 km on the safety of railway construction and operation, the maximum slope value adopted by Daxi Bus has been studied. Research conclusions: In view of the three largest slope schemes of 20 ‰, 25 ‰ and 30 ‰ of Huoshan Yueling Lot, the discussion and technical and economic comparison are made, and the acceleration of the domestic 250 ~ 300 km / h EMUs on the long and large slope, Dynamic performance simulation. Under the precondition of ensuring operational safety, the maximum gradient of 30 ‰ can be used to cancel the Huashan River Ridge tunnel and effectively save the project investment. Reasonably proposed 30 ‰ is the largest slope of the Greater Western part of the local difficulties.