黔张常铁路限制坡度研究陈军团.pdfVIP

站场枢纽 站场枢纽 铁道运输与经济 RAILWAY TRANSPORT AND ECONOMY 文章编号：1003-1421(2013)03-0020-06 中图分类号：U2 12.34 文献标识码：B 黔张常铁路限制坡度研究 Research on Limit Gradient of Qianjiang-Zhangjiajie-Changde Railway 陈军团 CHEN Jun-tuan （中铁第一勘察设计院集团有限公司 线路运输处，陕西 西安 710043） (Track and Transportation Department, China Railway The First Survey and Design Group Ltd., Co., Xi’an 710043, Shaanxi, China) 摘 要：黔张常铁路建设区域内岩溶及岩溶水是对线路坡度选择影响最大、最为突 出的工程地质问题。结合黔张常铁路线路的功能定位、区域路网的坡度情况、地 形地质特征和工程风险，从与相邻线匹配性、运输安全性、运输质量和经济性等 方面分别对本线的限制坡度为13‰和18‰的方案进行研究和比选。最后，推荐经 济性好，能进一步拔高线路高程，有效分解长大隧道，减少工程风险的限制坡度 为18‰方案。 关键词：铁路；限制坡度；地址特征；方案选择 Abstract: Inside the Qianjiang-Zhangjiajie-Changde railway construction area, karst and karst water are the most serious and extrusive geological problems which influencing the selection of track gradient. Combining with the function location of Qianjiang-Zhangjiajie-Changde railway track, gradient status of regional railway network, terrain and geological characteristics as well as engineering risk, this paper studies and compares the schemes of 13‰ and 18‰ limit gradient of the railway respectively from the aspects of matching rate with adjacent line, transport safety, transport quality and economical efficiency. In the end, the scheme of 18‰ limit gradient is recommended, which has good economy, could improve track height in further step and effectively construct long tunnel in subsection and reduce engineering risk. Key Words: Railway; Limit Gradient; Geological Characteristics; Scheme Selection 20 第35卷 第3期