›› 2009, Vol. 30 ›› Issue (1): 129-134.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Mechanisms of reinforced pavements on soft clay under traffic loading

LIU Fei-yu1, 2, CAI Yuan-qiang2, XU Chang-jie2, WANG Jun2   

  1. 1. Department of Civil Engineering, Shanghai University, Shanghai 200072, China; 2. Department of Civil Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2007-05-14 Online:2009-01-10 Published:2011-01-14

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Abstract:

In order to study the dynamic response of reinforced pavements on soft clay under traffic loading, cyclic triaxial tests were first conducted to investigate the effect of initial deviator stress, loading frequency, overconsolidation ratio, and cyclic stress ratio on softening behavior of clay. The empirical equation for softening of clay was proposed by regression analysis. The equation was imported into FEM program through compiled subroutine. Dynamic response of unreinforced and geogrid reinforced pavements was studied by FEM in order to investigate mechanisms of reinforcement. FEA results indicated that softening behavior of clay had visible effect on the performance of unreinforced and reinforced pavements. The effect of reinforcement increased with the increase of loading number. Geogrid reinforcement can provide lateral confinement at the bottom of the base layer and reduce surface deformation and nonuniform settlement. The effect of reinforcement was also shown to reduce the influenced depth of clay under traffic loading.

Key words: traffic loading, reinforced pavements, softening behavior, mechanisms of reinforcement

CLC Number: 

  • U 45
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