Shear Modulus of Sand at Small Strain under K0 Stress State

LI You-hong; GU Xiao-qiang; LIANG Fa-yun

doi:10.11988/ckyyb.20180924

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Journal of Changjiang River Scientific Research Institute ›› 2018, Vol. 35 ›› Issue (11) : 154-158. DOI: 10.11988/ckyyb.20180924

THE 28TH NATIONAL SYMPOSIUM ON GEOTECHNICAL TESTING

Shear Modulus of Sand at Small Strain under K₀ Stress State

LI You-hong^{1, 2}, GU Xiao-qiang^{1, 2, 3}, LIANG Fa-yun^{1, 2}

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Abstract

One-dimensional consolidation tests were carried out in a stress path triaxial to investigate the coefficient of lateral earth pressure K₀ of saturated Toyoura sand with different densities. Bender elements for shear wave measurement were installed in the triaxial device. The shear wave velocity of sand specimens can be measured under the K₀ stress state and then the small strain shear stiffness G₀ of Toyoura sand can be calculated. Results demonstrated that the value of K₀ decreases as the density of sand increases. Furthermore, the effects of effective mean confining pressure and density on shear modulus G₀ at small strain were also investigated. Parameters A and n in the empirical equation for predicting the G₀ of sand sample during the K₀ stress rate were determined. Moreover, the relationship between K₀ and G₀ was analyzed and it was found that K₀ decreases almost linearly as G₀ increases.

Key words

sand / triaxial test / density / lateral static earth pressure K₀ / bender element / shear modulus at small strain

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LI You-hong, GU Xiao-qiang, LIANG Fa-yun. Shear Modulus of Sand at Small Strain under K₀ Stress State[J]. Journal of Changjiang River Scientific Research Institute. 2018, 35(11): 154-158 https://doi.org/10.11988/ckyyb.20180924

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