The influence of water retention curve hysteresis on the stability of unsaturated soil slopes

2011 ◽  
Vol 25 (23) ◽  
pp. 3563-3574 ◽  
Author(s):  
Kuo-Chen Ma ◽  
Yih-Chi Tan ◽  
Chu-Hui Chen
Keyword(s):  
Unsaturated Soil ◽  
Water Retention ◽  
Water Retention Curve ◽  
Retention Curve ◽  
Soil Slopes ◽  
Influence Of Water ◽  
The Stability

scholarly journals Investigating the effect of porosity on the soil water retention curve using the multiphase Lattice Boltzmann Method

2021 ◽  
Vol 249 ◽  
pp. 09007
Author(s):  
Reihaneh Hosseini ◽  
Krishna Kumar ◽  
Jean-Yves Delenne
Keyword(s):  
Lattice Boltzmann Method ◽  
Soil Water ◽  
Unsaturated Soil ◽  
Lattice Boltzmann ◽  
Water Retention ◽  
Water Retention Curve ◽  
Soil Water Retention Curve ◽  
Soil Water Retention ◽  
Retention Curve ◽  
Boltzmann Method

The soil water retention curve (SWRC) is the most commonly used relationship in the study of unsaturated soil. In this paper, the effect of porosity on the SWRC is investigated by numerically modeling unsaturated soil using the Shan-Chen multiphase Lattice Boltzmann Method. The shape of simulated SWRCs are compared against that predicted by the van Genuchten model, demonstrating a good fit except at low degrees of saturation. The simulated SWRCs show an increase in the air-entry value as porosity decreases.

Influence of water density on the water-retention curve of expansive clays

Géotechnique ◽  
2012 ◽  
Vol 62 (8) ◽  
pp. 657-667 ◽  
Author(s):  
A.C. JACINTO ◽  
M.V. VILLAR ◽  
A. LEDESMA
Keyword(s):  
Water Retention ◽  
Water Retention Curve ◽  
Water Density ◽  
Retention Curve ◽  
Expansive Clays ◽  
Influence Of Water

Coupled water retention and shrinkage properties of a compacted silt under isotropic and deviatoric stress paths

2012 ◽  
Vol 49 (8) ◽  
pp. 928-938 ◽  
Author(s):  
C.F. Chiu ◽  
Charles W.W. Ng
Keyword(s):  
Hysteresis Loop ◽  
Unsaturated Soil ◽  
Water Retention ◽  
Stress Path ◽  
Degree Of Saturation ◽  
Water Retention Curve ◽  
Mean Stress ◽  
Test Results ◽  
Retention Curve ◽  
Shrinkage Curve

Although it is generally recognized that unsaturated soil behavior is governed by two constitutive variables (matric suction and net normal stress) and that the hydromechanical behavior of unsaturated soil is coupled, a water retention curve obtained from tests under zero stress and assuming no volume change is still fairly common. A relatively limited number of studies on the stress path–dependent water retention curve (SDWRC), particularly under a broader range of stress paths, exist in the literature. In this paper, the SDWRC, shrinkage curve, and swelling curve of a compacted silt subjected to isotropic and deviatoric stress paths are presented. The test results show that the air-entry value (AEV) increases, but the hydraulic hysteresis loop decreases with an increase in net mean stress. Furthermore, for a given stress level, the K0-compressed specimen exhibits higher AEV, but a smaller hysteresis loop than that of the isotropically compressed specimen. A nonlinear shrinkage curve is observed and the gradient of the post-yield shrinkage curve depends on the degree of saturation and net mean stress, but is independent of the stress path. For the range of suction studied, the gradient reduces with a decreasing degree of saturation, but with an increasing net mean stress. Finally, the test results are compared with the prediction of a model based on two independent constitutive stress variables.

Estimation of the water retention curve for unsaturated clay

2011 ◽  
Vol 91 (4) ◽  
pp. 543-549 ◽  
Author(s):  
Seid Majdeddin Mir Mohammad Hosseini ◽  
Navid Ganjian ◽  
Yadolah Pashang Pisheh
Keyword(s):  
Soil Properties ◽  
Soil Water ◽  
Unsaturated Soil ◽  
Laboratory Tests ◽  
Water Retention ◽  
Water Retention Curve ◽  
Soil Water Retention Curve ◽  
Soil Water Retention ◽  
Retention Curve ◽  
Unsaturated Clay

Mir Mohammad Hosseini, S. M., Ganjian, N. and Pashang Pisheh, Y. 2011. Estimation of the water retention curve for unsaturated clay. Can. J. Soil Sci. 91: 543–549. Extensive laboratory tests are essential in order to determine the soil water retention curve, defined as the relationship between water content and suction, in an unsaturated soil. These laboratory tests are usually costly and time consuming. Moreover, for most practical problems, it has been found that approximate unsaturated soil properties are adequate for analysis. Thus, empirical procedures for predicting unsaturated soil parameters would be invaluable. The water retention curve can be estimated using soil properties to avoid the costs of experimental methods. Estimation of the water retention curve based on index properties is highly desirable due to its simplicity and low cost. Here, a model for the estimation of the soil water retention curve for fine soils is introduced, which takes the plasticity index and fine content into account, and is based on the Van Genuchten and Fredlund-Xing equations. The proposed equations are validated by comparing measured and simulated results. The curves predicted with these models were found to be in good agreement with the experimental results.

INFLUENCE OF SOIL MATRIX ON SOIL-WATER RETENTION CURVE AND HYDRAULIC CHARACTERISTICS

2017 ◽  
Vol 16 (4) ◽  
pp. 869-877
Author(s):  
Vasile Lucian Pavel ◽  
Florian Statescu ◽  
Dorin Cotiu.ca-Zauca ◽  
Gabriela Biali ◽  
Paula Cojocaru
Keyword(s):  
Soil Water ◽  
Water Retention ◽  
Water Retention Curve ◽  
Hydraulic Characteristics ◽  
Soil Water Retention Curve ◽  
Soil Water Retention ◽  
Soil Matrix ◽  
Retention Curve

Modeling Soil Water Retention Curve with a Fractal Method

Pedosphere ◽  
2006 ◽  
Vol 16 (2) ◽  
pp. 137-146 ◽  
Author(s):  
Guan-Hua HUANG ◽  
Ren-Duo ZHANG ◽  
Quan-Zhong HUANG
Keyword(s):  
Soil Water ◽  
Water Retention ◽  
Water Retention Curve ◽  
Soil Water Retention Curve ◽  
Soil Water Retention ◽  
Fractal Method ◽  
Retention Curve
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