新建西安至十堰高速铁路最大坡度研究

新建西安至十堰高速铁路穿越山高沟深、高程落差大的秦岭山脉,沿线地形地质条件复杂,选择经济合理的最大坡度方案,对线路长度、工程规模、建设投资、运营效果、运输能力影响较大。结合规范要求及相邻高速铁路主要技术标准,对翻越秦岭的蓝田至郧西段最大坡度方案进行研究,采用综合分析法、比较法等对20‰,25‰,30‰不同方案进行定性和定量综合论证分析,推荐采用与地形适应好、工程经济优、运输质量高、与路网协调统一的25‰坡度方案。研究结论为本线技术标准选择提供了有力的技术支撑,同时为其他铁路翻越秦岭地段最大坡度选择提供参考。

Study on Maximum Grade of the Newly-built Xi'an-Shiyan High-speed Railway

The newly-built Xi'an to Shiyan High Speed Railway passes through the Qinling Mountains with high peaks and deep valleys of large different altitudes. It is very important to choose the most economical and reasonable maximum grade scheme in terms of the length of the line,the scale of the project,the investment of the construction,the operation effect and the transportation capacity. With reference to specification requirements and main technical standards adopted by the adjacent high-speed railway,the maximum grade scheme of Lantian to Yunxi is studied based on comprehensive analysis and comparison. The 20‰,25‰ and 30‰ of different schemes are analyzed by qualitative and quantitative methods. The 25‰ grade scheme is recommended due to its good adaptability to topography,excellent engineering economy,high transportation quality and coordination with road network. The research conclusion provides strong technical support for the selection of technical standard of the line,and provides decision-making basis for other railways to choose the maximum slope to cross over Qinling Mountains.