Abstract：The warm and ice-rich frozen soil under an outside load will generate relatively large compression deformation which greatly influences the stability of roadbed. The compression tests of warm and ice-rich frozen soil show that under the constant load and variable temperatures，the compressibility at －1.5 ℃ or －1.0 ℃ is smaller than that at －0.5 ℃ or －0.3 ℃，and the latter accounts for 70% of the total compressibility. Temperature is the key factor to compressibility coefficient of the warm and ice-rich frozen soil. The compressibility coefficient greatly increases with increasing of temperature. When temperature is at －1.5 ℃ and －0.3 ℃，the compressibility coefficient is 0.04 MPa－1 and 0.29 MPa－1，respectively. The numerical calculation of embankment deformation shows that，the maximum value of the embankment settlement deformation is about 20 cm in the coming 50 a when the height of embankment is bigger than the critical height of embankment. The maximum value of 20 cm is certainly acceptable. However，once the height of embankment is less than the critical height of embankment，the thawing settlement deformation of embankment will happen. So the embankment will be steady as long as the heat stability of embankment can meet the design requirement.
