Small-strain characterization of Shanghai clays by triaxial compression tests

Author:

Lan L,Ye G,Zhu W,Zhang Q

Abstract

Abstract The mechanical properties of the upper Shanghai Layers 2-6 clays at small strain levels have been extensively investigated. Nonetheless, limited data exist on their small-strain characteristics through K 0-consolidated undrained triaxial compression tests, with even less information available for the deeper layers 8 and 10. This study employed a series of K 0-consolidated undrained TC tests on intact samples from both the upper layers 2-6 and the deeper layers 8 and 10 of Shanghai clay. We evaluated the undrained maximum secant stiffness (Eu max) and reference shear strain (γ0.7 ). An increase in over-consolidation ratio (OCR) results in a higher E u max/p’ and a more rapid decay of the G/G max with the increasing shear strain (γ). As the value of γ 0.7 increases with I p and decreases with OCR, a correlation between γ 0.7 and Ip can be established. This study observed significant correlations between the E u max, effective stress (p’), and the maximum deviatoric stress, as well as between E u max and the cone resistance obtained from field cone penetration tests. These correlations offer methods to estimate E u max and γ0.7 values based on parameters that are more readily measurable, which provide critical references for the calculations and design parameters in foundation engineering within the Shanghai region.

Publisher

IOP Publishing

Reference51 articles.

1. Investigation of the overconsolidation and structural behavior of Shanghai clays by element testing and constitutive modeling;Ye;Underground Space,2016

2. Constitutive model of soft soil after considering small strain stiffness decay characteristics;Zhang;J. Shanghai Jiaotong Univ.,2019

3. Cyclic threshold shear strains in soils;Vucetic;J. Geotech. Eng.,1994

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