Applied Sciences (Feb 2022)

Numerical Analysis for Elucidating the Effect of Tunnel Excavation in Gravel-Mixed Ground

  • Hisashi Hayashi,
  • Yasuyuki Okazaki,
  • Daisuke Sakai,
  • Shingo Morimoto,
  • Masato Shinji

DOI
https://doi.org/10.3390/app12031667
Journal volume & issue
Vol. 12, no. 3
p. 1667

Abstract

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In tunnel construction in gravel-mixed ground, it is extremely important to predict the risk of gravel dropout and the accompanying large deformation of the substrate ground. The distribution and shape of gravel vary, and it is difficult to reproduce the situation depending on the individual site. Therefore, in this study, we created a model of the gravel-mixed ground using the Voronoi partition model. Then, by mathematical analysis, the gravel shape that appears in the actual phenomenon could be reproduced in consideration of randomness and inhomogeneity. In addition, it was clarified that the gravel extrusion phenomenon and the large deformation of the ground can be expressed.

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