Multi-scale modelling of the mechanical behaviour of grouted sand

• Autorzy: Hicher P. Y. , Dano Ch. , Chang C. S.
• Konferencja: Proceedings of the 14th French-Polish Colloguium "Soli and Rock Mechanics. soil Mechanics - Geomaterials" Grenoble, August 29-31, 2007
• Języki publikacji: EN

Abstrakty

EN

Such mechanical properties of sand as its stiffness, cohesion and, to a less extent, friction angle can be increased through the process of grouting. A constitutive model adapted for cohesive-frictional materials from a homogenization technique, which allowed us to integrate constitutive relations on the grain level, has been developed to obtain constitutive equations for the equivalent continuous granular medium. The local behaviour was assumed to obey Hertz-Mindlin's elastic law and Mohr-Coulomb's plastic law. The influence of the cement grout was modelled by means of adhesive forces between grains in contact. The intensity of these adhesive forces is the function of nature and the amount of grout present inside the material and can be reduced due to a damage mechanism at the grain contact during loading. In this paper, we present several examples of simulation which show that the model can reproduce with sufficient accuracy the mechanical improvement induced by grouting as well as the damage of the grain cementation during loading.

Słowa kluczowe

EN

mechanical properties; constitutive equations; grouted sand

• Wydawca: De Gruyter
• Czasopismo: Studia Geotechnica et Mechanica
• Rocznik: 2008
• Tom: Vol. 30, nr 1-2
• Strony: 83--94
• Opis fizyczny: bibliogr. 17 poz.,

Twórcy

autor

Hicher P. Y.

autor

Dano Ch.

autor

Chang C. S.

• Research Institute of Civil and Mechanical Engineering, UMR CNRS, Ecole Centrale Nantes, Université de Nantes, Nantes, France

Bibliografia

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