3D Numerical Analysis Of A Shallow Tunnel Face Reinforced By Longitudinal Pipes


  • Toufik Fayad
  • Iyad Sliteen
  • Rose Ahmad


Tunneling, Face stability, Finite-difference analysis, Face reinforcement, Fiberglass pipes.


Supporting tunnel face by  Fiber glass pipes technology is an effective method  to maintain the stability of tunnel face, thus reducing surface settlements, face deformation and maintaining the safety of the workers and the mechanisms used in tunneling.

This paper presents the results of finite-difference numerical analyses (FLAC3D program) on the behavior of a shallow tunnel face reinforced by longitudinal fiber glass pipes. A 3D numerical model has been calibrated and used to demonstrate the effectiveness of this technique, and perform a parametric study to determine the critical  reinforcements parameters (the density (number of pipes)(A) and length (L)). The results indicate that the face reinforcement technique using longitudinal fiber glass pipes can significantly reduce the movements (face displacement and surface settlements), and thus improving the face stability. These movements decrease by increasing the length of the pipes and increasing the density of the pipes until reaching the critical density, and when we reach the critical length, the pipes must be renewed to maintain the stability of the tunneling process.



How to Cite

Fayad T, Sliteen I, Ahmad R. 3D Numerical Analysis Of A Shallow Tunnel Face Reinforced By Longitudinal Pipes. Tuj-eng [Internet]. 2020Nov.16 [cited 2023Mar.22];40(5). Available from: http://journal.tishreen.edu.sy/index.php/engscnc/article/view/9989