Frost heaving monitoring system and frost heaving rules for the high-speed railway embankment in the seasonally frozen soil regions

Embankment frost heaving is the key problem for building a high-speed railway in seasonally frozen soil regions. Relying on the practices of multiple frost heaving monitoring for high-speed railway embankment in Northeast China and North China,the construction method of the frost heaving monitoring system was studied,and the method has been successfully applied to the frost heaving monitoring work in Harbin-Qiqihar Passenger Dedicated Line,Datong-Xi'an Passenger Dedicated Line and Mudanjiang-Suifenhe Railway. The frost heaving rules and reasons for a high-speed railway embankment were analyzed based on the monitoring results. The results show that the conditions,such as severe cold,low temperature and high speed should be fully considered in the process of construction for the frost heaving monitoring system,the advanced sensors and internet of things technologies also should be used effectively to the subsystem integration. It has some certain regularity of the embankment frost heaving during high-speed railway constructing in the seasonally frozen soil regions. The embankment frost heaving is inevitable but manageable. The quality of roadbed filling is the basic way and the process control of construction quality is the basic guarantee in the anti-frost heaving effort.