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Volume 37 Issue 1
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ZHANG Jun-hao, CHEN Zheng-han, TIAN Zhi-min, JIANG Shi-yong, LI Chun-hai. One-dimensional compression tests and deformation rules of unsaturated soils[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(1): 61-66. DOI: 10.11779/CJGE201501006
Citation: ZHANG Jun-hao, CHEN Zheng-han, TIAN Zhi-min, JIANG Shi-yong, LI Chun-hai. One-dimensional compression tests and deformation rules of unsaturated soils[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(1): 61-66. DOI: 10.11779/CJGE201501006
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One-dimensional compression tests and deformation rules of unsaturated soils

  • 1. Logistical Engineering University, Chongqing 401311, China; 2. Chongqing Key Laboratory of Geomechanics & Geoenvironmental Protection, Chongqing 401311, China; 3. The Fourth Engineering Scientific Research Institute of the Headquarters of the General Staff, Beijing 100850, China

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  • Received Date: March 06, 2014
  • Published Date: January 19, 2015
    Graphical Abstract
    • Abstract
  • In order to study the deformation rules of unsaturated soils under lateral confinement, a series of one-dimensional compression tests are carried out under controlled initial dry density and matric suction. The concepts of tangent compressibility coefficient and tangent volume compression coefficient are proposed. Results of the study indicate that the tangent compressibility coefficient and tangent volume compression coefficient decay exponentially with the increasing net vertical pressure. Based on this law, two empirical models, which can describe the variations of void ratio and vertical strain with the net vertical stress, are established. The rationality of the proposed models and their applicability to various types of unsaturated soils are verified using the test data in other literatures. The proposed models can be used to calculate the mean compressibility indexes within arbitrary pressure interval, to compute the slaking deformation of unsaturated soils due to the increase of moisture content, and also to describe the variation of void ratio with the matric suction.
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    • References (14)
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