Didier Subrin

Centre d'études de l'emploi

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Jean Sulem

École nationale des ponts et chaussées

Daniel Dias

Université Grenoble Alpes

Huy Tran-Manh

Itasca Consultants (France)

Henry Wong

Lawrence Livermore National Laboratory

Nathalie Monin

Institut Français

Manuel de la Fuente

Universitat de València

Reza Taherzadeh

Tractebel Engineering (Belgium)

The Manh Vu

Centre d'Etudes et de Recherches Appliquées à la Gestion

HΝ

Henry Ν. C. Wong

Chinese University of Hong Kong

Huy Tran Manh

École nationale des ponts et chaussées

Cooperative Institutions

Centre National de la Recherche Scientifique

Laboratoire Navier

École nationale des ponts et chaussées

École Nationale des Travaux Publics de l'État

Laboratoire de Tribologie et Dynamique des Systèmes

Université Claude Bernard Lyon 1

École Normale Supérieure - PSL

Engie (France)

Centre d'Etudes et de Recherches Appliquées à la Gestion

Laboratoire de Mécanique et Génie Civil

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A Closed-Form Solution for Tunnels with Arbitrary Cross Section Excavated in Elastic Anisotropic Ground

Rock Mechanics and Rock Engineering (2014)

Huy Tran Manh Jean Sulem Didier Subrin

Transverse isotropy

Section (typography)

Stress field

Linear elasticity

10.1007/s00603-013-0542-0

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Citations (51)

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

Rock Mechanics and Rock Engineering (2012)

The Manh Vu Jean Sulem Didier Subrin Nathalie Monin Judith Lascols

Ellipse

Discontinuity (linguistics)

Closure (psychology)

Flattening

10.1007/s00603-012-0320-4

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Citations (35)

Anisotropic Time-Dependent Modeling of Tunnel Excavation in Squeezing Ground

Rock Mechanics and Rock Engineering (2015)

Huy Tran Manh Jean Sulem Didier Subrin D. Billaux

Viscoplasticity

Closure (psychology)

10.1007/s00603-015-0717-y

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Citations (77)

Time-Dependent Behavior of Saint-Martin-La-Porte Exploratory Galleries: Field Data Processing and Numerical Modeling of Excavation in Squeezing Rock Conditions

International Journal of Geomechanics (2021)

Yichun Liu Jean Sulem Didier Subrin Huy Tran-Manh Emmanuel Humbert

Field monitoring programs (e.g., convergence measurements and stress measurements in the support system) play an important role in following the response of the ground and of the support system during and after excavation. They contribute to the adaptation of the excavation and support installation method and the prediction of the long-term behavior. In the context of the Lyon–Turin link project, an access gallery (SMP2) was excavated between 2003 and 2010, and a survey gallery (SMP4) has been excavated since 2017. Both tunnels are excavated in Saint-Martin-la-Porte (France) across a strongly tectonized Carboniferous formation, which is highly fractured and heterogeneous. Squeezing behavior has been observed and led to the instability of the support system and of the tunnel face in various locations. Based on the knowledge gained from field data processing and numerical modeling in SMP2, new field data are analyzed for SMP4, which is excavated at a much deeper depth, with a different orientation and with different excavation methods. Numerical modeling of the various profiles of SMP4 considering the excavation stages and the specific yielding support is presented, which predicts the time-dependent response of the tunnel.

10.1061/(asce)gm.1943-5622.0002200

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Citations (14)

Extrusion movements of a tunnel head reinforced by finite length bolts—a closed‐form solution using homogenization approach

International Journal for Numerical and Analytical Methods in Geomechanics (2000)

Henry Ν. C. Wong Didier Subrin Daniel Dias

Homogenization

10.1002/(sici)1096-9853(200005)24:6<533::aid-nag80>3.3.co;2-

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Citations (1)

Applicability of the Convergence-Confinement Method to Full-Face Excavation of Circular Tunnels with Stiff Support System

Rock Mechanics and Rock Engineering (2019)

Manuel de la Fuente Reza Taherzadeh Jean Sulem Xuan-Son Nguyen Didier Subrin

10.1007/s00603-018-1694-8

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Citations (41)

Extrusion movements of a tunnel head reinforced by finite length bolts—a closed-form solution using homogenization approach

International Journal for Numerical and Analytical Methods in Geomechanics (2000)

Henry Wong Didier Subrin Daniel Dias

An analytical model on the general behaviour of a tunnel head, reinforced by finite length bolts is proposed. This model is based on the homogenization method and spherical symmetry assumption. Despite its simplicity, and in consequence its limits of validity, it does allow a quick estimation of the key design parameters: frontal displacement, extension of decompressed zone, ground stresses and bolt tension, and constitutes thereby a very useful and handy tool for design engineers. In particular, the influence of the reinforcement length, as well as other important design parameters, are studied by the proposed model. The charts resulting from the parametric studies are directly applicable. Otherwise, the comparison to a 3D numerical model is also presented in this paper. The first results provide the validation of the analytical solution, at least in terms of average extrusion movements. Copyright © 2000 John Wiley & Sons, Ltd.

Homogenization

10.1002/(sici)1096-9853(200005)24:6<533::aid-nag80>3.0.co;2-8

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Citations (33)

Stress measurement in partially saturated soils and its application to physical modeling of tunnel excavation

Canadian Geotechnical Journal (2013)

Nicolas Berthoz Denis Branque Henry Wong Didier Subrin

The capacity of a commercially available miniature pressure sensor for measuring stress evolutions in a partially saturated soil under quasi-static loads is studied, in view of its later application in laboratory-scale physical models. An extensive calibration program is first performed on a triaxial cell under isotropic loadings. These calibration tests provide useful data for assessing the uncertainty in stress measurements, especially in the case of partially saturated granular materials. Notably, influences of soil density, water content, and average grain size on stress measurements are quantified. Following these tests, an example of stress measurements on an original reduced-scale model of “earth pressure balance shield” (EPBS) is presented, which involves three-dimensional arching effects developing around the shield during excavation.

Lateral earth pressure

Overburden pressure

Triaxial shear test

10.1139/cgj-2013-0154

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Citations (8)

Semi-Analytical Solution for Stresses and Displacements in a Tunnel Excavated in Transversely Isotropic Formation with Non-Linear Behavior

Rock Mechanics and Rock Engineering (2012)

The Manh Vu Jean Sulem Didier Subrin Nathalie Monin

Transverse isotropy

Linear elasticity

Cohesion (chemistry)

Stress field

10.1007/s00603-012-0296-0

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Citations (45)

Convergenceconfinement analysis of a bolt-supported tunnel using the homogenization method

Canadian Geotechnical Journal (2006)

Henry Wong Didier Subrin Daniel Dias

The behaviour of tunnels reinforced with radially disposed fully grouted bolts is investigated in this paper. Perfect bonding and ideal diffusion of bolt tension are assumed, so that the bolt tension can be assimilated to an equivalent uniaxial stress tensor. An analytical model of the convergenceconfinement type is proposed that accounts for the delayed action of bolts due to ground decompression prior to bolt installation. This factor leads to nonsimultaneous yielding, and more generally, a different stress history for each constituent, requiring special treatments in the incremental elastoplasticity calculations. Nonetheless, the resulting model remains sufficiently simple, and an analytical solution is still accessible. Charts are provided to allow for parametric studies and quick preliminary designs. Comparisons with 3D numerical calculations show that the model gives precise results if the correct convergence at the moment of bolt installation is used as an "external" input parameter, validating the homogenization approach. An approximate methodology based on previous works is proposed to determine this parameter to render the proposed model "self-sufficient." Its predictions are again compared to 3D numerical computations, and the results are found to be sufficiently accurate for practical applications.Key words: reinforcement, anisotropy, analytical, lining, yield, elastoplasticity.

Homogenization

10.1139/t06-016

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Citations (25)