Cimentaciones

The bearing capacity of a foundation is a load which, if were applied, would result in an immediate, often differential, settlement of considerable magnitude, due to the relative movement between soil particles along a surface in which it's shear resistance is exceeded. The difference between this settlement and those related to deformation is that the latter do not correspond to a slip. This difference, however, still causes confusion, as it will be discussed in the paper. This document aims to shed light on the aspects of the stability of superficial foundations that often remain out of discussion in academic texts and whose ignorance contributes to an opaque and automated professional practice.

Conseils pratiques pour bien réussir la construction en ciment. 1-Respecter les dosages indiqués ci-après (dosages indicatifs peuvent être variés selon les spécifications construction) 2-L'eau utilisée doit être de l'eau potable (décanté). 3-Bien malaxer le mélange (3à 5 minutes si mécanique) 4-Protéger votre mortier contre : Le froid (5° = Gel détérioration du processus de prise) Le soleil (le mélange sèche trop vite et ne durcit pas assez) 1 sac = 50 g 1 Brouette = 57 litres 1 Seau = 10 litres 1) Fondations-Dosage conseillé pour le béton de semelle (l'ensemble de la construction), poutres et poteaux. 1 Sac de CPJ CEM II/B 32,5 = 50 kg 1 de sable propre = 57 litres 1 de gravier G1 = 57 litres 1 de gravier G2 = 57 Litres 2,5 d'eau propre= 25 litres 1 de blocage de 10 cm. précautions à prendre : Le voile doit être coulé en une seule fois Utiliser une aiguille vibrante pour une homogénéité. 2) Béton banché (voiles) 1 Sac de CPJ CEM II/B 32,5 = 50 kg 1 de sable propre = 57 litres 1 de gravier G1 = 57 litres 1 de gravier G2 = 57 litres 2,5 d'eau propre = 25 litres précautions à prendre : Le voile doit être coulé en une seule fois Utiliser une aiguille vibrante pour une homogénéité.

This work shows the variability of the friction angle based on the geological history, over the bearing capacity of shallow foundations. This study was developed through the generation of random fields of friction angle using the matrix decomposition technique for a self-correlated lognormal distribution. In addition, to recreate the geological history, the
anisotropic random fields were created using the rotation matrix with angles of 0, 45 and 90 degrees. Subsequently, these random fields were implemented in a finite element model of a continuous footing. A linear elastoplastic constitutive model was selected to represent stress-strain soil behavior together with the Mohr-Coulomb failure criteria. This last work was done in order to understand the influence of geological history and the variability of the friction angle in the bearing capacity of shallow foundations. Results include the weight of the variability of the friction angle in the bearing capacity and the influence of the dip over the friction angle and the bearing capacity.