›› 2009, Vol. 30 ›› Issue (12): 3665-3670.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental study of strength of frozen sandy soil under different water contents and temperatures

LAI Yuan-ming, ZHANG Yao, ZHANG Shu-juan, JIN Long, CHANG Xiao-xiao   

  1. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2008-08-08 Online:2009-12-10 Published:2010-01-18

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Abstract:

According to the distributing characteristics of water content and ground temperature along Qinghai-Tibet Railway, triaxial compressive experiments of frozen sandy soils from Qinghai-Tibet plateau were conducted with 30%-80% (supersaturated)water contents and temperature ranging from -0.5℃ to -6.0℃. The results show that with increasing water content, strength of sandy soil nonlinearly increases when the testing temperatures is -0.5℃; and it has a minimum value with the temperature of -1.0℃, whereas when the temperature is equal to or below -2.0℃ it gradually decreases. Based on the relationship between the strength and normal stress under different temperatures, yielding criteria of Mises and linear Mohr-Coulomb is used to describe the yielding situation of sandy soil, respectively.

Key words: frozen sandy soil, compressive strength, supersaturated water content, yielding criteria

CLC Number: 

  • TU 41
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