路基冻害是严寒地区影响铁路安全及正常运营的常见病害,它与寒冷的气候有关,冰冻线能达到相当深度,又涉及到土的特性。在哈局管内的各种路基病害中,路基冻害因其分布广、时间长、工作量大、影响行车非常严重而占首位。如何整治路基冻害,减少维修养护工作量,确保行车安全受到各 Freezing of roadbed is a common disease affecting the safety and normal operation of the railway in severe cold areas. It is related to the cold climate. The freezing line can reach a considerable depth and also relates to the characteristics of the soil. Among the various roadbed diseases in Harbin Bureau of Pipeline, the frost-freeing of subgrade tops the list because of its wide distribution, long time, heavy workload and serious traffic impact. How to rehabilitate roadbed frost damage, reduce the workload of maintenance and repair, and ensure traffic safety are all affected