Resin injection in clays with high plasticity - 10/11/16
Abstract |
Regarding the injection process of polyurethane resins in clays with high plasticity, this paper presents the experimental results of the pressuremeter and cone penetration tests before and after injection. A very important increase in pressure limit or in soil resistance can be observed for all the studied depths close to the injection points. An analytical analysis for cylindrical pore cavity expansion in cohesive frictional soils obeying the Mohr–Coulomb criterion was then used to reproduce the pressuremeter tests before and after injection. The model parameters were calibrated by maintaining constant the elasticity parameters as well as the friction angel before and after injection. A significant increase in cohesion was observed because of soil densification after resin expansion. The estimated undrained cohesions, derived from the parameters of the Mohr–Coulomb criterion, were also compared with the cone penetration tests. Globally, the model predictions show the efficiency of resin injection in clay soils with high plasticity.
Le texte complet de cet article est disponible en PDF.Keywords : Resin injection, Cavity expansion, Pressuremeter tests, Cone penetration tests
Plan
Vol 344 - N° 11-12
P. 797-806 - novembre 2016 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.