Anchor conditions for estimated unsaturated shear strength functions

被引:1
作者
Tran, Thi Phuong An [1 ]
Fredlund, D. G. [2 ]
Vanapalli, S. K. [3 ]
机构
[1] Hue Univ, Univ Sci, Dept Hydrogeol & Geotech Engn, Hue City, Vietnam
[2] Univ Saskatchewan, Dept Civil & Environm Engn, Saskatoon, SK S7N 5A9, Canada
[3] Univ Ottawa, Dept Civil Engn, 61 Louis Pasteur St, Room A015, Ottawa, ON K1N 6N5, Canada
关键词
unsaturated shear strength; unsaturated soil; soil-water characteristic curve; shear strength function; anchor conditions; air-entry value; residual suction; SOIL; PREDICTION; MODEL;
D O I
10.1139/cgj-2022-0255
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
Since the mid-1990s, several empirical unsaturated shear strength equations have been proposed for use in geotechnical engineering practice. Most of the equations have been based on information associated with the measured drying soil-water characteristic curve (SWCC) in combination with the effective shear strength parameters of the saturated soil. There have been few studies, however, undertaken on verifying and comparing the suitability of the proposed unsaturated shear strength equations. This study involves consideration of a wide range of possible drying SWCCs plotted as a relationship between the degree of saturation and suction (saturation soil-water characteristic curve (S-SWCC)). The study forms the basis for comparing five methodologies that have been proposed for the estimation of the shear strength of unsaturated soils. The SWCCs are defined by the fitting parameters for the Fredlund and Xing (1994) sigmoidal equation. This study supports the use of unsaturated soil shear strength empirical estimation methods using the S-SWCC anchor points of air-entry value and residual suction of the soil.
引用
收藏
页码:1938 / 1953
页数:16
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