By Lyesse Laloui
This ebook presents a valid foundation within the not easy quarter of the mechanics of unsaturated geomaterials. the target is to provide the reader with an exhaustive evaluate ranging from the fundamentals and overlaying the newest theories and purposes (i.e. usual failures, nuclear waste disposal, oil and agriculture productions). The presentation of the elemental techniques relies on an interdisciplinary process, within the parts of soil, rock and cement-based fabric mechanics.Content:
Chapter 1 uncomplicated innovations within the Mechanics and Hydraulics of Unsaturated Geomaterials (pages 1–28): Alessandro Tarantino
Chapter 2 Mechanics of Unsaturated Soils (pages 29–54): Lyesse Laloui, Mathieu Nuth and Bertrand Francois
Chapter three Desiccation Cracking of Soils (pages 55–86): Herve Peron, Lyesse Laloui, Liang?Bo Hu and Tomasz Hueckel
Chapter four Experimental ideas for Unsaturated Geomaterials (pages 89–112): Pierre Delage
Chapter five New Experimental instruments for the Characterization of hugely Overconsolidated Clayey Materials1in Unsaturated stipulations (pages 113–128): Simon Salager, Alessio Ferrari and Lyesse Laloui
Chapter 6 box size of Suction, Water content material and Water Permeability (pages 129–154): Alessandro Tarantino
Chapter 7 Hydromechanical Coupling idea in Unsaturated Geomaterials and Its Numerical Integration (pages 155–184): Robert Charlier, Jean?Pol Radu, Pierre Gerard and Frederic Collin
Chapter eight Conservation legislation for Coupled Hydro?Mechanical approaches in Unsaturated Porous Media (pages 185–208): Ronaldo I. Borja and Joshua A. White
Chapter nine pressure Localization Modeling in Coupled temporary Phenomena (pages 209–232): Frederic Collin, Yannick Sieffert and Rene Chambon
Chapter 10 Modeling Landslides in partly Saturated Slopes Subjected to Rainfall Infiltration (pages 233–250): John Eichenberger, Mathieu Nuth and Lyesse Laloui
Chapter eleven Thermally prompted Moisture shipping and Pore strain new release in approximately Saturated Geomaterials (pages 251–278): Antony P.S. Selvadurai
Chapter 12 Mechanics of Unsaturated Geomaterials utilized to Nuclear Waste garage (pages 279–302): Antonio Gens
Chapter thirteen Soil–Pipeline interplay in Unsaturated Soils (pages 303–325): Dilan Robert and Kenichi Soga
Chapter 14 Coefficient B, Consolidation, and Swelling in tremendous Soils close to Saturation in Engineering perform (pages 327–351): Luc Boutonnier
Chapter 15 Geomechanical research of River Embankments (pages 353–374): Cristina Jommi and Gabriele Della Vecchia
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Mechanics of Unsaturated Geomaterials
This ebook offers a valid foundation within the demanding region of the mechanics of unsaturated geomaterials. the target is to provide the reader with an exhaustive assessment ranging from the fundamentals and protecting the latest theories and functions (i. e. ordinary mess ups, nuclear waste disposal, oil and agriculture productions).
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Example text
Consequently, the processes of drying and wetting cause irreversible changes in the degree of saturation. The capillary hysteresis is attributed to the variable pore size distribution within the soil as well as to the wetting and drying contact angles of water with respect to the solid phase. 6. Capillary hysteresis in sand. 6. The air entry value se represents the suction above which the degree of saturation becomes lower than 1. The (Sr–s) relationship is not unique and is actually related to the deformation of the soil skeleton.
Chapter written by Lyesse LALOUI, Mathieu NUTH and Bertrand FRANÇOIS. 30 Mechanics of Unsaturated Geomaterials For all the other cases, the soil should be described as an unsaturated material. e. water and gas). Unsaturated materials distinguish themselves by the fact that the pore pressure affects the mechanical behavior by means of surface tension. Thus, the fluids are not “neutral” anymore like the saturated soils. This effect is associated with the capillary phenomena inside the pores and is manifested as a suction phenomenon in the entire material.
11. 1 MPa [TAN 08] As far as wetting–drying paths are concerned, the temperature effects on the shrinkage and swelling/collapse of the soil with the changes in suction have been almost exclusively investigated on compacted materials. The influence of thermal effects on swelling/collapse behaviors seems to depend on the considered materials. The swelling potential of high-density compacted Boom clay increases with increase in temperature [ROM 03], while the swelling capacity of FEBEX bentonite seems to decrease with the increase in temperature [VIL 04].