十宜铁路限制坡度选择的研究分析

摘要

Limiting gradient is one of the important technical standards for railway route selection,it has a significant impact on engineering investment and risk control especially in mountain area.The Shiyan-Yichang railway under various limiting gradient proposals are studied and analyzed in this arti-cle in terms of vertical section,engineering situation and investment,engineering risk and operation cost conversion,coordination with neighboring road network and transportation development adapta-bility,etc,and it is found that the proposal of limiting gradient 1 3‰ has relatively larger advantages in terrain adaptability,engineering investment and operation,etc,so it is the recommended proposal.%限制坡度是铁路选线中重要的技术标准之一，尤其在复杂山区铁路中，对工程投资和工程风险控制有重大影响。文中通过从不同限坡方案的平纵断面条件、工程情况和投资、换算工程运营费、工程风险，以及与相邻路网协调性、运输发展的适应分析等方面对十宜铁路的6‰，9‰，13‰，18‰限坡方案进行了研究和比较，13‰方案在适应地形、工程投资、工程运营等方面具有较大优势，最终推荐限坡13‰方案。