贵阳至广州线线路最大坡度方案比选

Scheme Alternative of Maximum Route Gradient on Guiyang-Guangzhou Railway

研究目的:通过从地形地貌、工程投资、运输组织、工期、施工风险等方面对不同的坡度方案进行分析、比选,确定贵广线合理的线路设计坡度。研究结论:本线建议采用限制坡度9‰、加力坡18‰的方案。从地形地貌分析,限制坡度9‰、加力坡18‰更能适应地形,且节省工程投资;从运输组织分析,满足货车速度和牵引质量要求,而运行时间增加不多,满足运输需要;从施工工期分析在总工期相同时工期更加合理,全线的人工和资金投入比例也比较均衡,不会出现人工和资金紧张的情况;从施工风险分析,可溶岩隧道基本上采用"人"坡,对突发事件的抗风险能力更强,所以决定本线坡度方案为:限制坡度9‰、加力坡18‰方案。

Research purposes： According to landform, period and construction risk, etc., different gradient reasonable route design gradient of GuiGuang railway. investment of project proposals have been , transportation organization, construction analyzed and compared to determine the Research conclusions：It is recommended that limited gradient is 9%v and assisting gradient is 18%v. According to all kinds of analysis, the proposal with limited gradient of 9%v and assisting gradient of 18%v is adaptable to landform better and save investment of project, satisfies the speed and traction mass requirements of freight train and the transport requirement due to few increase of running time, is more reasonable when the total construction period is the same and balanced in proportion of human power and funds inputted for the whole line and has not appear the situation which is short of human power and funds and has stronger anti - risk ability for sudden accident as the double spur grade is adopted in tunnels in the soluble rock stratum. Therefore it has been determined that the proposal with limited gradient of 9%v and assisting gradient of 18%v is adopted for this route.