吉林大学学报(工学版) ›› 2011, Vol. 41 ›› Issue (增刊2): 149-152.

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Correlation of subgrade soil shear strength and plasticity index under freeze-thaw cycles

LIU Han-bing, WANG Jing, WEI Hai-bin, FENG Kai   

  1. College of Transportation, Jilin University, Changchun 130022, China
  • Received:2010-11-22 Online:2011-09-30 Published:2011-09-30

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Abstract:

Three different plasticity index subgrade soil were selected from seasonal frozen soil region.Static triaxial test was executed on the samples exposed to 0 to 7 times closed-system freeze-thaw cycles under different confining pressures.The results show that with the same kind of soil under the same freeze-thaw cycles,the shear strength increases with confining pressure;Shear strength with the same confining pressure decreases with the number of freeze-thaw cycles;Under the same confining pressure and the same freeze-thaw cycles,shear strength increases with the plasticity index.The exponential function was adopted for multiple nonlinear fitting.The relationship between shear strength and confining pressure,plasticity index,freeze-thaw cycles was obtained and showed a good correlation.

Key words: road engineering, seasonally frozen soil region, freeze-thaw cycles, plasticity index, static triaxial test

CLC Number: 

  • U416.03


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