Numerical analyses of stability and deformation behavior of reinforced and unreinforced tunnel faces

Alessandra Paternesi, Helmut F. Schweiger, Giuseppe Scarpelli

Research output: Contribution to journalArticleResearchpeer-review

Abstract

In traditional tunneling, an analysis of the face stability is required to avoid failure mechanisms or excessive face extrusion. Face reinforcement can improve face stability and reduce deformations. In the present work a numerical study of both unreinforced and reinforced tunnel excavation faces by means of 3D FEM analyses is presented. The results are compared with those of the traditional limit equilibrium method and with an analytical solution based on previous numerical studies. It could be shown that the LEM may lead to non-conservative results. Finally, the deformation response is assessed and the benefits of face reinforcements are investigated.

Original languageEnglish
Pages (from-to)256-266
Number of pages11
JournalComputers and Geotechnics
Volume88
DOIs
Publication statusPublished - 1 Aug 2017

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reinforcement
Tunnels
Reinforcement
tunnel
failure mechanism
extrusion
Excavation
Extrusion
excavation
Finite element method
method
analysis

Keywords

  • Extrusion
  • Face reinforcement
  • FEM
  • LEM
  • Tunnel face stability

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Computer Science Applications

Cite this

Numerical analyses of stability and deformation behavior of reinforced and unreinforced tunnel faces. / Paternesi, Alessandra; Schweiger, Helmut F.; Scarpelli, Giuseppe.

In: Computers and Geotechnics, Vol. 88, 01.08.2017, p. 256-266.

Research output: Contribution to journalArticleResearchpeer-review

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