By Laloui, Lyesse (editor), Lyesse
In recent times, significant advances were made in realizing the coupling among chemical and organic techniques and mechanical and hydraulic behaviours in soils and rocks. whilst, experimentation and modelling functions have advanced considerably, permitting powerful layout of geotechnical functions. the necessity for such analyses arises, for instance, in chemical and organic soil development; nuclear, detrimental and municipal waste containment; petroleum and typical fuel extraction; methane hydrate exploitation; CO2 sequestration; and overview of pavement durability.
The 17th Géotechnique Symposium in Print came about on the establishment of Civil Engineers on three June 2013 and sought to handle the recent demanding situations which are rising from the interactions among multi-physical phenomena. those complaints collect the overseas learn provided on the symposium and released throughout problems with Géotechnique in addition to extra next examine released within the journal.
The papers chosen for the symposium conceal quite a lot of geotechnical strategies, including:
- Experimental research and constitutive modelling of the bio- and chemo-mechanical behaviour of geomaterials.
- results of adjustments within the pore water chemistry on soil and rock behaviour.
- Interactions among geometrical scales of various organic, chemical, actual and mechanical processes.
- Case reports of chemical and organic soil modifications.
- functions of bio- and chemo-mechanical versions in rising technologies.
Bio- and Chemo- Mechanical techniques in Geotechnical Engineering presents researchers and practitioners with a entire creation to the hot advances within the quarter and worthwhile perception into the advancements inside this rising box.
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Additional info for Bio- and Chemo-Mechanical Processes in Geotechnical Engineering: Géotechnique Symposium in Print 2013
The previously described stress paths are quantitatively represented in Figs 1 and 2. In both the mechanical and the 33·30 S4 10·00 S3 2·60 S2 Initial point S1 0·61 Loading/unloading at constant osmotic suction 1 125 Vertical mechanical stress, σv: kPa 1000 Fig. 1. Applied stress paths for oedometer samples under mechanical loading only Loading/unloading at constant osmotic suction 33·30 Increase of osmotic suction first determined by the filter paper method, using Schleicher and Schuell no. 5 mm dia.
Therefore there were two types of stress increment, mechanical and chemical, which allowed the elaborate stress paths to be defined. The experimental programme was designed such that the influence of osmotic suction on the mechanical behaviour could be researched first. To this end, a series of seven oedometer tests were conducted at different but constant values of osmotic suction of the pore liquid. Two of the samples were prepared with distilled water; the five others were prepared with one of the aforementioned solutions.
The reason for this agreement is that the samples have been loaded to a vertical stress sufficiently high (10 MPa) that the virgin consolidation lines converge. Thereby, the two specimens reach the same values of history variables, e and p0Ã , although the stress paths have been different (one has undergone a sodium chloride solution/distilled water cycle and the other has not). Irreversible behaviour is also captured; it is associated with the plastic behaviour of the macrostructure, since microstructural behaviour is considered reversible.