›› 2011, Vol. 32 ›› Issue (S1): 100-105.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Variations of pore structure, void ratio, and water content in soil drying process

LI Xu1, 2, ZHANG Li-min3, AO Guo-dong1   

  1. 1. School of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing 100044 China; 2. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China; 3. School of Civil Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
  • Received:2011-02-18 Online:2011-05-15 Published:2011-05-16

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Abstract: During the drying process of a soil under constant total stresses, the increase of soil suction will induce the drainage of pore-water and the shrinkage of soil pore-structure. For a soil at a particular state, the microstructure determines its void ratio; and the soil suction determines the water content. During the drying process, if the pores are assumed not to shrink until the pore-water drains, then soil suction provides a bridge between the soil microstructure and soil draining behavior represented by the soil-water characteristic curve and the soil shrinkage curve: (1) the envelope of the cumulative pore volume curves is the soil-water characteristic curve; (2) the shrinkage curve is found to locate in a narrow range which can be determined using the cumulative pore volume curve.

CLC Number: 

  • TU 443
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