Evaluation of Formulas for Estimating the Shear Strength of Unsaturated Granitic Residual Soils

›› 2019, Vol. 33 ›› Issue (2): 210-214.

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Evaluation of Formulas for Estimating the Shear Strength of Unsaturated Granitic Residual Soils

CHEN Zhidong1, ZHANG Lingshuai1, CHEN Minhua1, LU Zhao1,2,3, CHEN Xiaoliang3， CHEN Rui3

（1.Shenzhen Hongyeji Geotechnical Science and Technology Co., Ltd., Shenzhen 518000；
2.Department of Civil and Environmental Engineering, University of Macau, Macau 999078；
3.College of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518000）

Received:2019-02-18 Revised:2019-03-06 Online:2019-04-20 Published:2019-04-22

Abstract

Abstract: The granitic residual soils are widely distributed in southern China and these soils are generally unsaturated in nature. However, the mechanical properties of the unsaturated granitic residual soils are rarely reported. This paper presents the undrained directed shear test result of the unsaturated granitic residual soils. The tested shear strength values were compared with three different formulas for the shear strength estimations. The comparative results indicate that the Oberg formula had the best estimation results. Further, this formula can predict the shear strength by only providing the degree of saturation at failure, therefore, it can be easily applied in the practical engineering projects.

Key words: granitic residual soils, unsaturated soils, direct shear tests, shear strength

CHEN Zhidong1, ZHANG Lingshuai1, CHEN Minhua1, LU Zhao1,2,3, CHEN Xiaoliang3， CHEN Rui3. Evaluation of Formulas for Estimating the Shear Strength of Unsaturated Granitic Residual Soils[J]. , 2019, 33(2): 210-214.

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Evaluation of Formulas for Estimating the Shear Strength of Unsaturated Granitic Residual Soils

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