Estimation des tassements différentiels des sols de fondation de bâtiment : contribution des sondages de résistivité électrique
- Post by: SOAPHYS-KZ
- 21 janvier 2024
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https://dx.doi.org/10.46411/jpsoaphys.2024.CJK.001
Section de la parution: Informations de publication
J. P. Soaphys, Vol 4, N°1 (2024) CJKA01
Pages : CJKA01-1 à CJKA01-6
Informations sur les auteurs
Hamma Fabien YONLI1,2,
Gilbert MANO1, Mahamadou KOÏTA3, Aristide COMPAORE4
1Ecole Supérieure d’Ingénierie, Université de Fada N’Gourma, BP 54 Fada
N’Gourma, Burkina Faso
2Laboratoire de Physique et de Chimie de l’Environnement (LPCE),
Université Joseph KI-ZERBO, BP 7021 Ouagadougou 03, Burkina Faso
3Laboratoire Eaux Hydro-Systèmes et Agriculture (LEHSA), Institut
International d’Ingénierie de l’Eau et de l’Environnement (2iE), 01 BP 594
Ouagadougou 01, Burkina Faso
4Laboratoire National du Bâtiment et des Travaux
Publics (LNBTP), BP 133 Ouagadougou 01, Burkina Faso
RESUME
To estimate differential settlements of building foundation soils, the site on which the structure is based must be geotechnically surveyed in order to determine the deformation parameters and the thickness of the compressible soil layers in various places. This involves conducting destructive surveys. In this study, the use of geophysical methods (electrical soundings) as a substitute for the conventional methods used was considered. The Schlumberger electrodes array was deployed at the level of a control borehole and at three projected footings. The combination of the results of the electrical soundings with the lithological section of the borehole reveals a significant correlation between the variations of cumulative resistivities and the lithological section of the subsoil. The thickness of the compressible layers at the level of the projected footings is estimated to vary between 5 and 6 m. Œdometric differential settlements have an estimated maximum value of 4.56 cm
Mots-Clés : Differential settlements, geophysics, vertical electrical soundings, building
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