调查青藏铁路运营后多年冻土区的路基防排水设施。青藏铁路多年冻土区路基防排水设施存在并急需解决的问题是部分地段排水沟变形或破损、路基坡脚积水和防排水设施不够完善。分析防排水设施病害产生的原因和危害,对青藏铁路多年冻土区路基防排水技术措施进行探讨,建议研究开发具有刚性和柔性特点的新型结构的排水沟,对填土垫高路基坡脚的技术措施进一步优化研究。 Investigate subgrade drainage and drainage facilities in permafrost regions after operation of Qinghai-Tibet Railway. The problem that the anti-drainage facilities on subgrade in permafrost region of Qinghai-Tibet Railway exist and need to be solved urgently is that the drainage ditches are deformed or damaged in some sections, and the water and drainage facilities on the foot of subgrade are inadequate. This paper analyzes the causes and harms of the anti-drainage facilities and explores the anti-drainage measures for the subgrade of the Qinghai-Tibet Railway in permafrost regions. It is suggested that a new type of drainage ditch with rigid and flexible characteristics should be developed and developed. Technical measures to further optimize the research.