Bearing capacity of bucket foundations in silt-over-clay soil condition under combined V-H-M loading

Tugen Fenga Key Laboratory for Ministry of Education for Geomechanics and Embankment Engineering, Geotechnical Research Institute, Hohai University, Nanjing, Jiangsu, P.R. China;d Guangdong Key Laboratory of Oceanic Civil Engineering, China, School of Civil Engineering, Sun Yat-Sen University, Guangzhou, China;;b State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou, China;c South China Institute of Geotechnical Engineering, South China University of Technology, Guangzhou, ChinaView further author information

Shujin Zhoub State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou, China;c South China Institute of Geotechnical Engineering, South China University of Technology, Guangzhou, ChinaView further author information

Mi Zhoub State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou, China;c South China Institute of Geotechnical Engineering, South China University of Technology, Guangzhou, China;d Guangdong Key Laboratory of Oceanic Civil Engineering, China, School of Civil Engineering, Sun Yat-Sen University, Guangzhou, China;Correspondence[email protected]
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Yun Xuf Jinhua Highway and transportation Management Center, Jinhua, Zhejiang, P.R. China;;e School of Architecture and Civil Engineering, Jiangsu University of Science and Technology, Zhenjiang, P.R. ChinaView further author information

Xihong Zhangg School of Civil and Mechanical Engineering, Curtin University, Bentley, AustraliaView further author information

Mingge Yed Guangdong Key Laboratory of Oceanic Civil Engineering, China, School of Civil Engineering, Sun Yat-Sen University, Guangzhou, China;View further author information

Abstract

The bearing capacity of bucket foundations subjected to combined vertical-horizontal-moment loadings (V-H-M) is an important issue for its design and application. This paper investigates the response of bucket foundations under V-H-M loadings in silt-over-clay using small strain finite element method. Model validation is carried out by comparing with previously testing data with good agreement obtained. Then parametric study is conducted to study the effect of embedded ratio, soil property and top layer thickness. It is found that the soil failure mechanism and corresponding bearing capacity of bucket foundations in silt-over-clay are significantly different to that in clay only condition. Approximating expressions are proposed to describe the unique trends of the normalized failure envelopes for bucket foundations in silt-over-clay soil deposits. The findings of this study could help to guide design application of bucket foundations.

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Funding

This research was supported by the Guangdong Basic and Applied Basic Research Foundation (2021A1515010828, 2020A1515410001) and Safety operation model of utility tunnel in Tianhe Smart City, Guangzhou (0692-189C04410681/01). This support is gratefully acknowledged.

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Bearing capacity of bucket foundations in silt-over-clay soil condition under combined V-H-M loading

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Bearing capacity of bucket foundations in silt-over-clay soil condition under combined V-H-M loading

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