›› 2010, Vol. 31 ›› Issue (6): 1791-1796.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental research on wetting deformation of clayey soil of a freeway subgrade with different stress paths

ZHANG Xiu-cheng1, 2，WANG Yi-zhong2, 3，FU Xu-dong2, 3   

  1. 1. Department of Civil and Architecture Engineering, Putian University, Putian, Fujian 351100, China; 2. Key Laboratory of Geotechnical and Structural Engineering safety of Hubei Province, Wuhan University, Wuhan 430072, China; 3. School of Civil and Architectural Engineering, Wuhan University, Wuhan 430072, China
  • Received:2009-11-19 Online:2010-06-10 Published:2010-06-25

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Abstract:

In order to consider the slaking deformation of the clayey soil of a freeway subgrade caused by wetting, a lot of laboratory tests of clayey samples were tested. For the purpose of finding out laws of wetting deformation of clayey soil along an approximate actual stress path. A series of tests along different stress paths were carried out in conventional triaxial apparatus, including conventional triaxial test stress path; conventional triaxial test+K0 consolidation stress path; "K0 consolidation + conventional triaxial test stress path". And test samples with the plane strain " K0 consolidation + triaxial shear"stress path and plane strain constant stress ratio stress path were tested in true triaxial apparatus. By analyzing the experimental data, a power function is employed, to describe the relations between additional axial strain and stress level. By analyzing the stress-strain curves along different stress paths, some formulas are deduced.

Key words: wetting deformation, stress path, clayey soil, laboratory tests

CLC Number: 

  • U 416.03
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