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随着我国铁路运输事业的发展,行车密度和实际轴重不断提高,年通过总重超过60Mt·km/km的线路已达数千公里。大秦线预计初期运量60Mt·km/km,远期运量0.1Gt·km/km,则通过总重分别达到0.12Gt·km/km和0.2Gt·km/km。这些线路的轨道应该采取什么标准?国家经济计划委员会和有关部门曾组织多方面、多层次的专家论证会,对特重型轨道的标准进行了反复、深入地探讨。根据专家论证的意见,整理了“在特重型轨道上必须铺设75kg/m钢轨”、“特重型轨道的轨枕长度和合理配置数量的探讨”、“特重型轨道道床合理断面的探讨”三篇文章。这些意见有待于在实际运营中予以验证。本期先刊出第一篇,其余两篇将分别于第三、四期发表。
With the development of railway transport in our country, the driving density and the actual axle load are continuously increasing, and the number of kilometers passing over 60Mt · km / km in a year has reached thousands of kilometers. The Daqin line is estimated to have an initial capacity of 60 Mt · km / km and a long-term traffic volume of 0.1 Gt · km / km, respectively, with a total weight of 0.12 Gt · km / km and 0.2 Gt · km / km, respectively. What standards should be adopted for the orbit of these routes? The State Economic Planning Commission and relevant departments have organized many-sided and multi-level expert testimonies to conduct repeated and in-depth discussions on the standards for special heavy orbits. According to the opinions of the experts, three articles, “75 kg / m rails must be laid on extra heavy orbit,” “Discussion on the length of sleeper and the rational allocation of extra heavy orbit,” “Discussion on the reasonable section of extra heavy orbit rail bed” . These opinions need to be verified in actual operation. The first issue of this issue first, the remaining two will be published in the third and fourth.