›› 2010, Vol. 31 ›› Issue (5): 1407-1412.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Study of mechanics behavior and constitutive model of cemented soil under static triaxial tests

WANG Jun1, DING Guang-ya1, PAN Lin-you1, CAI Yuan-qiang1, GAO Yu-feng 1, 2   

  1. 1. College of Architecture and Civil Engineering, Wenzhou University, Wenzhou 325035, China; 2. Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China
  • Received:2008-06-12 Online:2010-05-10 Published:2010-05-24

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Abstract:

Undrained triaxial compressive tests were carried out on cemented soil to investigate the effects of confining pressure and cement ratio on the strength, pore water pressure and stiffness of cemented soil. It was observed that with the increase of confining pressure and cement ratio, the strength and stiffness increase and pore water pressure decreases. The stiffness decreases as the axial strain increased. The stiffness decreases greatly at the beginning of the tests and then the stiffness curves become smooth with a small degradation rate with the increase of axial strain. The relationship between normalized deviator stress and stiffness shows a nonlinear. With the increase of the normalized deviator stress, the normalized stiffness decreases. The stiffness degradation behavior of soft clay was described and Duncan-Chang model was modified. The parameters for modified Duncan-Chang model were obtained by regression. The comparison of simulation results with test data shows the modified model can simulate the strain-softening stress -strain relations of cemented soil.

Key words: cemented soil, strength, pore water pressure, stiffness, constitutive model

CLC Number: 

  • O 319.56
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