›› 2010, Vol. 31 ›› Issue (6): 1891-1896.

• Geotechnical Engineering • Previous Articles     Next Articles

Analysis of one-dimensional consolidation characteristics in unsaturated soils

QIN Ai-fang1，Qiang –rui1，TAN Yong-wei2, 3，SUN De-an1   

  1. 1. Department of Civil Engineering, Shanghai University, Shanghai 200072, China; 2. Department of Geotechnical Engineering,Tongji University, Shanghai 200092, China; 3. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China
  • Received:2008-12-23 Online:2010-06-10 Published:2010-06-25

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Abstract:

A set of analytical solutions have been reached through Laplace transform and other mathematical methodologies based on the Fredlund's one-dimensional consolidation theory for unsaturated soil, etc. The problem to be solved is about a layer of soil of finite thickness, adding to one dimension a large-area instantaneous load, while the soil top surface is penetrable and the bottom is impenetrable to water and air. A typical example result was given to analyze the changes in the excess pore-air pressure, excess pore-water pressure and sedimentation rate of soil with respect to time under different conditions air-water coefficient rate, and the changes in the pore-air pressure and excess pore-water pressure with depth at different times. The comparison between the analytical solutions reduced to saturated soils and the Terzaghi solution for saturated soils, indicates that the method is correct.

Key words: unsaturated soil, one-dimensional consolidation, analytical solution, excess pore-water pressure, excess pore-air pressure, semi-analytical solution

CLC Number: 

  • TU 44
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