research product . 2017

Convergence analysis of an unsupported micro-tunnel at the Meuse/Haute-Marne Underground Research Laboratory

GUAYACAN CARRILLO, Lina Maria; SULEM, Jean; SEYEDI, Darius; GHABEZLOO, Siavash; NOIRET, Aurélien; ARMAND, Gilles;
Open Access English
  • Published: 01 Jan 2017
  • Publisher: Geological Society of London
  • Country: France
Abstract
Convergence measurements recorded for one representative micro-tunnel (diameter c. 0.7 m) in Callovo-Oxfordian claystone were analysed. The micro-tunnel was excavated in the direction of the horizontal principal major stress. In situ observations showed anisotropic convergence with the maximum and minimum values in the horizontal and vertical directions, respectively. The horizontal closure of walls was fitted on the basis of a semi-empirical convergence law. This law is a predictive model reflecting the global response of the ground to excavation works. As the convergence measurements were performed after the end of excavation, their evolution in time can only ...
Subjects
free text keywords: MICROTUNNEL, ARGILE, EXCAVATION, CREUSEMENT, MILIEU ANISOTROPE
Communities
Transport Research
Digital Humanities and Cultural Heritage
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