Le Tunnel de base du Montcenis est l'ouvrage principal de la nouvelle liaison ferroviaire Lyon-Turin. Sa construction constitue l'un des grands projets du 21ème siècle. Il s'inscrit dans les corridors ferroviaires européens de transport favorisant la circulation des mar...

In the context of urban extension, the depletion of natural resources for construction constitutes a crucial issue. Specifically, in the field of earthworks, the amounts of materials can be massive and pose the crucial problem of resource shortage. Therefore, the reuse ...

Classical techniques for backfilling of trenches use unbounded materials. Unfortunately, they have always been presenting several drawbacks: difficulty of compaction, noise disturbance and time of implementation... Controlled Low Strength Materials (CLSM) could be a goo...

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 conv...

Les matériaux granulaires traités avec un liant hydraulique présentent un intérêt certain en comblement de tranchées, et notamment pour éviter les problèmes de post-compactage. Dans un grand nombre de cas, ces matériaux doivent toutefois rester faciles à excaver à la pi...

Closed-form solutions are of great interest for quick and accurate evaluation of stresses and displacements around underground excavations. Based on complex vari- able theory and on the method of conformal mapping, closed-form solutions for stresses and displacements ar...

The thermal conductivity of host rocks is an important parameter in the design of deep geological disposal of heat-emitting radioactive waste. Due to bedding, heat transfer in sedimentary rocks is affected by their transversally isotropic structure. In this work, an exp...

Construction of the 3300m long Chamoise Tunnel in the French Jura Mountains had to overcome long sections of swelling marls beneath an overburden of 400m. During the design phase a reconnaissance gallery of 9m2 was driven to investigate the geological conditions over th...