@article{Wang2023, 
author = {Weidong Wang and Qing Li and Zhanghua Xu and Ludan Zong and Yaoliang Li},
title = {Investigation and Application of Small-Strain Model Parameters for Soft Clay Deposits},
year = {2023},
journal = {Chinese Journal of Underground Space and Engineering},
volume = {19},
number = {3},
pages = {844-855},
keywords = {soft clay deposit, small strain hardening model, HS-Small model, deep cylindrical retaining structure, excavation of foundation pit},
url = {https://www.sciopen.com/article/10.20174/j.juse.2023.03.015},
doi = {10.20174/j.juse.2023.03.015},
abstract = {Non-linear stiffness at small strains is one of important intrinsic soil features and is vital to finite element analysis of deep excavations. This paper introduces determination of HS-Small model parameters for typical Shanghai clay layers (② ~ ⑥)through a series of laboratory tests. A method by which stiffness parameters Eoedref, E50ref, Eurref and small strain shear modulus G0ref can be deduced from compression modulus Es1-2 has been proposed. The values of parameters Rf,m,vur,γ0.7 are also suggested. Together with shear strength parameters of c′、φ′ provided in geotechnical investigation report, the HS-Small model parameters are determined. Finally, Based on the small strain model parameters determined by this method, the three-dimensional numerical analysis of Yunlingxi ultra-deep shaft structure of Shanghai deep tunnel drainage system is carried out, and the applicability of small strain constitutive model in ultra-deep foundation pit engineering is verified.}
}