Published June 2018 | Version v1
Miscellaneous Restricted

Modelling of the damage induced by the gallery excavations in claystone

Creators

  • 1. Andra, Direction de la R et D, 1/7, rue Jean Monnet, 92298 Chatenay-Malabry cedex (France)
  • 2. Laboratoire Navier - Ifsttar, CNRS, ENPC, Ecole des Ponts ParisTech, Marne-la-Vallee (France)

Description

The excavation of galleries in deep rocks induces the formation of failure zones around these structures. For semi-brittle rocks, taking into account the softening damage seems to be necessary for a correct description of the short term failure around the galleries. In this work, an elastic-damage softening model with anisotropic shear strength is employed to reproduce the short term extension of the excavation-induced failure zone as well as the displacements of the tunnels walls due to unloading. (authors)

Abstract (French)

Le creusement des galeries dans les roches profondes induit differentes zones de rupture autour de ces ouvrages. Pour les roches quasi-fragiles, la prise en compte de l'endommagement radoucissant parait necessaire pour une description correcte de la rupture a court terme au voisinage des parois. Dans ce travail, un modele radoucissant elasto-endommageable anisotrope en resistance est utilise pour reproduire l'extension a court terme de cette zone de rupture ainsi que les deplacements aux parois. (auteurs)

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Additional details

Additional titles

Original title (French)
Modelisation de l'endommagement induit par le creusement des galeries dans les argilites

Publishing Information

Imprint Pagination
9 p.
Report number
INIS-FR--22-0783

Conference

Title
9. National days of geotechnology and Engineering geology
Original Conference Title
9emes Journees Nationales de Geotechnique et de Geologie de l'Ingenieur - JNGG 2018
Acronym
JNGG 2018
Dates
13-15 Jun 2018
Place
Champs-sur-Marne (France)

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
53111559
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ANISOTROPY; ARGILLITE; BRITTLE-DUCTILE TRANSITIONS; COMPRESSION STRENGTH; COMPUTERIZED SIMULATION; DAMAGE; ELASTICITY; FINITE ELEMENT METHOD; MESH GENERATION; RUPTURES; SHAFT EXCAVATIONS; SHEAR; TENSORS; TUNNELS; YOUNG MODULUS
Descriptors DEC
CALCULATION METHODS; FAILURES; MATHEMATICAL SOLUTIONS; MECHANICAL PROPERTIES; NUMERICAL SOLUTION; ROCKS; SEDIMENTARY ROCKS; SHALES; SIMULATION; UNDERGROUND FACILITIES

Optional Information

Notes
15 refs.; Available from the INIS Liaison Officer for France, see the INIS website for current contact and E-mail addresses