严寒地区客运专线路基冻胀控制与施工技术

Frost Heave Control and Construction Technology of Passenger Dedicated Railway Subgrade in Severe Cold Area

结合地处严寒地区哈齐客专路基施工实践,分析严寒地区路基冻胀原因及影响因素,介绍了通过改良填料特性,设置筏板、保温护道、沥青封闭等技术措施,施工中严格控制填料细颗粒含量、含水量等关键点,并利用冬期进行堆载预压,较好地解决了严寒地区冻胀对路基的不良影响,可为同类工程提供借鉴。

In this paper, the cause of formation of the frost heave in subgrade and its influencing factors are explored, combining with construction practice of the subgrade of Harbin-Qiqihar passenger dedicated railway line in severe cold area. Technical measures such as improved filling material characteristic, raft board, insulating berm and asphalt seal are intro- duced, and then the key points like strictly controlled particle content and water content in filling material and stacking load precompaction in winter period are proposed to prevent subgrade from frost heaving in severe cold area. The work can be a good reference to the similar engineering.