Experimental study on small-strain shear modulus of calcareous sand

SHI Jin-quan; XIAO Yang; LIU Han-long; Wim Haegeman

doi:10.11779/CJGE202202014

Volume 44 Issue 2

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Chinese Journal of Geotechnical Engineering > 2022 > 44(2): 324-333. > DOI: 10.11779/CJGE202202014

SHI Jin-quan, XIAO Yang, LIU Han-long, Wim Haegeman. Experimental study on small-strain shear modulus of calcareous sand[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(2): 324-333. DOI: 10.11779/CJGE202202014

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Experimental study on small-strain shear modulus of calcareous sand

SHI Jin-quan^{1, 2, 3,},
XIAO Yang^{1, 2, 3, ,},
LIU Han-long^{1, 2, 3},
Wim Haegeman⁴

1.
School of Civil Engineering, Chongqing University, Chongqing 400045, China
2.
Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Chongqing 400045, China
3.
National Joint Engineering Research Center of Geohazards Prevention in the Reservoir Areas (Chongqing), Chongqing 400045, China
4.
Department of Civil Engineering, Ghent University, Gent 9000, Belgium

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Received Date: May 05, 2021
Available Online: September 22, 2022

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Abstract

Abstract

The small-strain shear modulus is an important parameter indicating soil stiffness in geotechnical engineering. In this study, the multidirectional bender element technique is used to investigate the small-strain shear modulus of calcareous sand from Persian Gulf. The effects of the coefficient of gradation, mean particle size and stress history on G_HH, G_HV and G_VH on both vertical and horizontal planes are considered. The test results show that for the calcareous sand used in this study, the stiffness anisotropy is significant, behaving as the higher G_HH than G_HV and G_VH. ${G_{\max }}$ increases with the increase of D₅₀ and decreases with the increase of C_u. The values of ${G_{\max }}$ at the loading stage are apparently higher than those at the unloading stage. Finally, the Hardin equation for predicting the small-strain shear modulus is modified with the participation of D₅₀, C_u and OCR, and a better prediction capability is obtained by comparing the traditional Hardin equation.
- initial shear modulus,
- bender element,
- small strain,
- calcareous sand,
- Hardin equation

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References (37)

References

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