Experimental study on parameters of HSS model for soft soils in Shanghai

LIANG Fa-yun; JIA Ya-jie; DING Yu-jin; HUANG Mao-song

doi:10.11779/CJGE201702010

Volume 39 Issue 2

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Chinese Journal of Geotechnical Engineering > 2017 > 39(2): 269-278. > DOI: 10.11779/CJGE201702010

LIANG Fa-yun, JIA Ya-jie, DING Yu-jin, HUANG Mao-song. Experimental study on parameters of HSS model for soft soils in Shanghai[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(2): 269-278. DOI: 10.11779/CJGE201702010

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Experimental study on parameters of HSS model for soft soils in Shanghai

LIANG Fa-yun^{1, 2},
JIA Ya-jie^{1, 2},
DING Yu-jin^{1, 2},
HUANG Mao-song^{1, 2}

1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China;
2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China

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Received Date: March 29, 2016
Published Date: March 24, 2017

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Abstract

The HS-Small model, which can reflect the attenuation of shear modulus of soils with strain in tiny strain range, has been gradually utilized in excavation engineering. The laboratory tests using triaxial apparatus, oedometer apparatus and resonant column device are conducted to obtain the prime parameters of HSS model, such as c’, E_oed^ref,E₅₀^ref,R_f,G₀^ref and γ_0.7for typical silty clay of layer No. 2, muddy silty clay of layer No. 3, muddy clay of layer No. 4 and silty clay of layer No. 5 in Shanghai. The measured parameters are compared with those in other cities in China and verified through practical engineering. The simulated results of horizontal displacement of retaining wall approximately equal to the measured data. The HSS model and the determination method for parameters are proved to be applicable in numerical simulation of excavation engineering in Shanghai. It is of reference value to similar engineering.
- excavation engineering,
- small-strain stiffness,
- HSS model,
- laboratory test,
- soft soil

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