According to the investigation and the mechanism of the embankment longitudinal cracks,the main reason for the crack is the appearance of thaw area under slope foot in permafrost region.

• 根据青藏公路纵向裂缝现场勘察和形成机理分析,认为导致路基纵向裂缝的主要原因是路基边坡坡脚下融化区的产生及发展。