为全面比较、分析成兰铁路云屯堡隧道采用合修（单洞双线）与分修（双洞单线）2种建设方案的优劣，针对云屯堡隧道进出口相连工程已开工建设的施工现状，以及隧道长度大于20 km的特点，根据隧道的地形、地质条件、辅助坑道设置状况，从防灾救援、工程投资、施工风险控制、施工组织、支护结构对软岩大变形的适应性、结构抗震、弃碴与环保、运营通风8方面进行了技术经济比较。经过综合比较和分析，得出云屯堡隧道可采用合修方案修建的结论。

Yuntunbao tunnel on ChengduLanzhou railway is more than 20 km long. The construction of the approach works to the entrance and exit of Yuntunbao tunnel has already been started before the construction of Yuntunbao tunnel. In the paper, two options, i.e., the option of single doubletrack tunnel tube and the option of double singletrack tunnel tubes, are proposed for the tunnel, and comparison and contrast is made on these two options in terms of disaster prevention and rescue, project investment, construction risk control, construction organization, adaptability of the support structure to the serious deformation of the soft rocks, seismic resistance of the tunnel structure, mucking, environment protection and operation ventilation. It is concluded that the option of single doubletrack tunnel tube can be adopted for Yuntunbao tunnel. 