By Mario Manassero, Andrea Dominijanni, Sebastiano Foti, Guido Musso
Environmental Geotechnics bargains with a wide selection of functions, equivalent to the characterization of polluted websites and landfill waste, the layout of containment structures for subsoil pollutant keep watch over, radioactive waste disposal, geo-energy exploitation and bacteria-driven soil amendment, between others. trustworthy and powerful predictions of the particular behaviour and function of those very complicated platforms require a deep realizing of the coupled hydro-bio-chemo-mechanical phenomena that ensue at very diversified scales. destiny growth within the medical cutting-edge and titanic developments within the general practices will hence be heavily regarding the improvement of shared wisdom between assorted disciplines. The extension and refinement of theoretical modelling and the experimentation features influenced by way of geo-environmental purposes extra regularly give you the framework for enormous developments within the soil and rock mechanics fields.
Coupled Phenomena in Environmental Geotechnics collects the distinctive lectures and papers awarded on the overseas Symposium on Coupled Phenomena in Environmental Geotechnics (Torino, Italy, 1-3 July 2013), which was once prepared by means of the Italian Geotechnical Society in the framework of Technical Committee TC 215 of the foreign Society for Soil Mechanics and Geotechnical Engineering (ISSMGE). The booklet, with contributions not just from the geotechnical group, but in addition from comparable and complementary disciplines, is of specific curiosity to engineers and teachers in geotechnical and environmental engineering.
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2010. Technical developments related to the problem of GCL panel shrinkage when placed below an exposed geomembrane. In Proceedings of the 3rd International Symposium on GCLs, Würzburg, Germany, September 2010, 93–102. , & Thiel, C. 2009. GCL Shrinkage – A Possible Solution. GFR 27(1): 10–21. , & Bryk, J. 2006. Laboratory measurements of GCL shrinkage under cyclic changes in temperature and hydration conditions. In Proceedings of the 8th International Conference on Geosynthetics, Yokohama, Japan, 18–22 September 2006.
A) section C (cool zone), b) section H (between heaters). Mechanical. Because of the very limited movements that the confined bentonite barrier can undergo, the main mechanical parameter considered is total stress. It would be expected that stresses in the barrier will increase very significantly during hydration because of the high swelling potential of a heavily compacted bentonite. As Figure 12 demonstrates, such an increase is indeed observed reaching quite high values of total stresses at the end of the test, of the order of 2–4 MPa.
For this reason, this term is usually neglected. 4 Numerical implementation and computer code The formulation outlined above has been discretized in space (finite elements) and time (finite differences) in order that it can be used for numerical analysis. The basic formulation and numerical discretization constitute the bases of a computer code, CODE_BRIGHT that has been used to perform the analysis reported below (Olivella et al. 1996). 6 DESCRIPTION OF THE LARGE-SCALE IN SITU TEST The large-scale in situ test (named FEBEX) simulates, at full scale, the Spanish repository concept for HLW that envisages placing the waste-containing canisters in horizontal drifts surrounded by an engineered barrier made up of compacted bentonite.