文章编号：1003-1421(2020)03-0084-06中图分类号：U291.I文献标识码：ADOI：10.16668/jki.issn.1003-1421.2020.03.15兰白城际铁路引入兰州站改扩建方案研究A Study on the Recon s truction and Expa nsion Scheme of Lanzhou-Bai y in In t ercity张申府