Geomechanics and Engineering

  • 제4권1호
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  • Pages.19-37
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  • 2012
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
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Analytical solution for undrained plane strain expansion of a cylindrical cavity in modified cam clay

  • Silvestri, Vincenzo (Department of Civil, Geological, and Mining Engineering, Ecole Polytechnique) ;
  • Abou-Samra, Ghassan (Department of Civil, Geological, and Mining Engineering, Ecole Polytechnique)
  • 투고 : 2011.03.23
  • 심사 : 2011.12.28
  • 발행 : 2012.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper presents the results of analytical and numerical analyses of the effects of performing a pressuremeter test or driving a pile in clay. The geometry of the problem has been simplified by the assumptions of plane strain and axial symmetry. Pressuremeter testing or installation of driven piles has been modelled as an undrained expansion of a cylindrical cavity. Stresses, pore water pressures, and deformations are found by assuming that the clay behaves like normally consolidated modified Cam clay. Closed-form solutions are obtained which allow the determination of the principal effective stresses and the strains around the cavity. The analysis which indicates that the intermediate principal stress at critical state is not equal to the mean of the other two principal stresses, except when the clay is initially isotropically consolidated, also permits finding the limit expansion and excess pore water pressures by means of the Almansi finite strain approach. Results are compared with published data which were determined using finite element and finite difference methods.

키워드

참고문헌

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  13. Research on multi-frequency ultrasonic scanning detecting technology of cavity in the test borehole vol.80, pp.2, 2012, https://doi.org/10.1007/s10064-020-01979-5
  14. Prediction of Unloading Failure Strain and Undrained Shear Strength of Saturated Clays by Limit Pressure from Prebored Pressuremeter vol.44, pp.5, 2012, https://doi.org/10.1520/gtj20200222
  15. Numerical modelling of the long-term effects of XCC piling in fine-grained soil vol.26, pp.1, 2012, https://doi.org/10.12989/gae.2021.26.1.027
  16. Anisotropic borehole response from pressuremeter testing in deep clay shale formations vol.58, pp.8, 2012, https://doi.org/10.1139/cgj-2019-0801
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