Download Coupled Phenomena in Environmental Geotechnics by Mario Manassero, Andrea Dominijanni, Sebastiano Foti, Guido PDF

By Mario Manassero, Andrea Dominijanni, Sebastiano Foti, Guido Musso

Environmental Geotechnics offers with a wide selection of purposes, 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 advanced platforms require a deep figuring out of the coupled hydro-bio-chemo-mechanical phenomena that happen at very diversified scales. destiny development within the medical state-of-the-art and significant developments within the usual practices will accordingly be heavily with regards to the advance of shared wisdom between diverse disciplines. The extension and refinement of theoretical modelling and the experimentation functions encouraged via geo-environmental functions extra ordinarily give you the framework for mammoth developments within the soil and rock mechanics fields.

Coupled Phenomena in Environmental Geotechnics collects the exact lectures and papers awarded on the overseas Symposium on Coupled Phenomena in Environmental Geotechnics (Torino, Italy, 1-3 July 2013), which used to be geared up by way of the Italian Geotechnical Society in the framework of Technical Committee TC 215 of the overseas Society for Soil Mechanics and Geotechnical Engineering (ISSMGE). The publication, 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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Degree of saturation and water pressure will reduce significantly in this region. Vapour arising from bentonite drying will diffuse outwards until finding a cooler region where vapour will condense, causing a local increase in water saturation. Vapour diffusion is a significant mechanism of water transfer mechanism and, to a much lesser extent, of heat transport. Due to low water pressures existing initially in the unsaturated material that constitutes the backfill, hydration will take place with water moving from the host rock to the barrier.

It should be noted that there is a direct relationship between relative humidity and total suction given by Kelvin’s equation (shown later). Therefore, measuring relative humidity (and temperature) is equivalent to measuring total suction. In addition, a number of boreholes were drilled into the rock prior to the emplacement of the heaters and bentonite blocks in order to install monitoring devices (Fig. 8). Temperature, pore pressures, total stresses and displacements were observed in the rock.

Figure 13 shows, as an example, the evolution of the temperature measured in borehole SF21. Four temperature sensors at different distances from the tunnel axis were installed in the borehole. A rapid increase of temperature is again observed at the start of the test followed by a constant but gentle rise. Observed temperatures in the rock reached a maximum value of about 40◦ C. The values and evolution of the temperatures are well predicted in practically all observation points, indicating again that the thermal conductivity estimate was quite accurate.

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