Anisotropic Closure in Squeezing Rocks: The Example of Saint-Martin-la-Porte Access Gallery

Autor: The Manh Vu, Jean Sulem, Didier Subrin, Nathalie Monin, Judith Lascols
Přispěvatelé: Géotechnique (cermes), Laboratoire Navier (navier umr 8205), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2013
Předmět:
Tunnel deformation Squeezing ground
Lithology
0211 other engineering and technologies
Closure (topology)
Geology
Geometry
02 engineering and technology
Deformation (meteorology)
010502 geochemistry & geophysics
Geotechnical Engineering and Engineering Geology
Ellipse
[PHYS.MECA.SOLID]Physics [physics]/Mechanics [physics]/Mechanics of the solides [physics.class-ph]
01 natural sciences
Discontinuity (geotechnical engineering)
Convergence (routing)
Anisotropy Convergence measurements
Geological structures
Geotechnical engineering
Anisotropy
[SPI.MECA.SOLID]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of the solides [physics.class-ph]
021101 geological & geomatics engineering
0105 earth and related environmental sciences
Civil and Structural Engineering
Principal axis theorem
Zdroj: Rock Mechanics and Rock Engineering
Rock Mechanics and Rock Engineering, Springer Verlag, 2013, 46 (2), pp.231-246. ⟨10.1007/s00603-012-0320-4⟩
ISSN: 0723-2632
1434-453X
DOI: 10.1007/s00603-012-0320-4⟩
Popis: International audience; In this paper, we analyse the convergence measurements recorded in a gallery excavated in severely squeezing ground. The procedure consists in a preliminary geometrical treatment of the raw data to evaluate the principal axes of deformation by assuming an elliptic deformation of the walls of the gallery. Then the convergence law proposed by Sulem et al. (Int J Rock Mech MinSci Geomech Abstr 24(3):145-154, 1987a), which is extended to account for anisotropic closure, is fitted on the displacements along the two axes of the obtained ellipse. This procedure is more robust and relevant than fitting the convergence recorded on the most deforming segment or fitting the average value of the convergence along the various segments. An attempt is made to correlate the amount and the direction of anisotropic deformation with the lithology and some geological features described by the dominant discontinuity families.
Databáze: OpenAIRE
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