Geomechanics and Engineering

  • 제21권3호
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  • Pages.279-288
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  • 2020
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

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Jet-grouting in ground improvement and rotary grouting pile installation: Theoretical analysis

  • Wang, You (Department of Civil Engineering, Tongji University) ;
  • Li, Lin (Department of Civil and Environmental Engineering, Louisiana State University) ;
  • Li, Jingpei (Department of Civil Engineering, Tongji University) ;
  • Sun, De'an (Department of Civil Engineering, Shanghai University)
  • 투고 : 2019.10.22
  • 심사 : 2020.03.23
  • 발행 : 2020.05.10
⟨ 이전 논문 다음 논문 ⟩

초록

The permeation grouting is a commonly used technique to improve the engineering geology condition of the soft ground. It is of great significance to predict the permeation range of the grout so as to ensure the effects of grouting. This paper conducts a theoretical analysis of jet-grouting effects in ground improvement and rotary grouting pile installation by utilizing deformation-permeation coupled poroelastic solutions based on Biot's theory and Laplace-Fourier integral transform technique. The exponential function and the intermittent trigonometric function are chosen to represent time-dependent grouting pressure usually encountered in ground improvement and rotary grouting pile installation process, respectively. The results, including the radial displacement, the hoop stress, the excess pore fluid pressure, the radial discharge, and the permeation radius of grout, are presented for different grouting time, radial positions and grouting lengths. Parametric study is conducted to explore the effects of variation of the exponent in the exponential grouting pressure-time relationship on grouting-induced responses. It is expected that the proposed solutions can be used to estimate the permeation range of grouting in ground improvement and rotary grouting pile installation.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China

The research described in this paper was financially supported by the National Natural Science Foundation of China (Grant No. 41772290).

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