Based on the observationaldata at Beiluhe test site of Qinghai-Tibetan Railway, the difference ofthermal state between south faced and north faced slope was analyzed. The results indicated that the mean annualground temperature at the depth of 0.5m on south faced slopewashigher than that on north faced slope by over 3 ℃. The higher temperature on south faced slope was greatly attributed tothehigh temperature during winter time. This kind of difference in thermal state may result in asymmetric thermal regime in embankment as well as in underlying soil. As a result, theunevenly transverse deformation mayappear.
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