Geomechanics and Engineering

  • 제35권1호
  • /
  • Pages.55-65
  • /
  • 2023
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Modelling creep behavior of soft clay by incorporating updated volumetric and deviatoric strain-time equations

  • Chen Ge (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University) ;
  • Zhu Jungao (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University) ;
  • Li Jian (Chengdu Engineering Corporation Limited) ;
  • Wu Gang (Huaneng Tibet Yarlungzangbo River Hydropower Development and Investment Co. Ltd) ;
  • Guo Wanli (Geotechnical Engineering Department, Nanjing Hydraulic Research Institute)
  • 투고 : 2023.02.23
  • 심사 : 2023.08.28
  • 발행 : 2023.10.10
⟨ 이전 논문 다음 논문 ⟩

초록

Soft clay is widely spread in nature and encountered in geotechnical engineering applications. The creep property of soft clay greatly affects the long-term performance of its upper structures. Therefore, it is vital to establish a reasonable and practical creep constitutive model. In the study, two updated hyperbolic equations based on the volumetric creep and deviatoric creep are respectively proposed. Subsequently, three creep constitutive models based on different creep behavior, i.e., V-model (use volumetric creep equation), D-model (use deviatoric creep equation) and VD-model (use both volumetric and deviatoric creep equations) are developed and compared. From the aspect of prediction accuracy, both V-model and D-model show good agreements with experimental results, while the predictions of the VD-model are smaller than the experimental results. In terms of the parametric sensitivity, D-model and VD-model are lower sensitive to parameter M (the slope of the critical state line) than V-model. Therefore, the D-model which is developed by incorporating the updated deviatoric creep equation is suggested in engineering applications.

키워드

과제정보

The research described in this paper was financially supported by the Postgraduate Research & Practice Innovation Program of Jiangsu Province (No. KYCX22_0623), the scientific project from Huaneng company Headquarters (HNKJ20-H45), 111 Project (No. B13024) and the Open Sharing Fund for the Large-scale Instruments of Hohai University (GX202205B, GX202204B).

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