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 • Previous Articles    

Shear Modulus of Sand at Small Strain under K0 Stress State

LI You-hong1, 2, GU Xiao-qiang1, 2, 3, LIANG Fa-yun1, 2   

  1. 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;
    2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Shanghai 200092, China;
    3. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221008, China
  • Received:2018-04-10 Revised:2018-09-21 Published:2018-11-01 Online:2018-11-01

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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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