Laboratory experiment study on the ballast and ventilated railway embankment in permafrost regions

This paper introduces the laboratory experimental results of the ballast and ventilated duct of railway embankment in permafrost regions. Results show that the temperature of the embankment soil mass goes down and the biggest thawing depth reduces gradually as time goes by, which proves that the combining railway embankment structure of ballast and ventilated duct can supply cold energy for the embankment soil mass and protect the permafrost underlying it, and further maintain the stability of the railway embankment.