EXPLORING THE LINKAGES BETWEEN GEOPHYSICAL AND GEOTECHNICAL PROSPECTION TO DETECT FOUNDATION FAILURE OF BUILDINGS IN A WETLAND AREA OF LAGOS, SOUTHWESTERN NIGERIA

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dc.contributor.authorAdeoti, L
dc.contributor.authorOpene-Odili, P.N
dc.contributor.authorOyedele, K.F
dc.contributor.authorOyeniran, T.A
dc.contributor.authorIshola, K.S
dc.contributor.authorAyuk, M.A
dc.date.accessioned2019-08-31T17:42:15Z
dc.date.available2019-08-31T17:42:15Z
dc.date.issued2018
dc.description.abstractThe geophysical and geotechnical methods were used to characterize the sub surface geologic units with a view to establishing the causes of foundation failure at Oyadiran Estate, Yaba, Lagos, Southwestern Nigeria. 2–D Electrical Resistivity Imaging, Vertical Electrical Sounding (VES) and Multichannel Analysis of Surface Wave (MASW) were acquired within the study area. Also, a Standard Penetration Testing (SPT) boring was acquired to constrain the geophysical methods. The results of 2–D resistivity and 1-D geoelectric sections delineated four to five geologic units. These correspond to topsoil, clay/peat, sandy clay, clayey sand and sand based on resistivity contrast ranging from 0.25 – 226 Ωm. The 2–D resistivity sections emphasized the lateral and vertical extents of the subsurface geological information. The MASW results revealed similar geologic units based on shear wave velocity discrimination except in a few cases which might be due to subsurface dip of the earth materials. An analysis of a typical geotechnical borehole has assisted to classify sand into loose, medium dense and dense based on SPT N-values and clay into very soft arising from cohesion (cu) value. This study has established that the clay materials with resistivity in the interval of 0.25 – 27 Ωm, Vs values 60 – 80 m/s2 and Cu of 12 -15 kN/ m2could be responsible for the foundation failure. Hence, the integration of 2–D Electrical Resistivity Imaging, VES and MASW complemented with a SPT boring has assisted to reduce this uncertainty by identifying the anomalous zones for detailed and cost effective geotechnical investigation.en_US
dc.identifier.citationAdeoti, L., Opene-Odili, P.N., Oyedele, K.F., Oyeniran, T.A., Ishola, K.S. and Ayuk, M.A.(2018). EXPLORING THE LINKAGES BETWEEN GEOPHYSICAL AND GEOTECHNICAL PROSPECTION TO DETECT FOUNDATION FAILURE OF BUILDINGS IN A WETLAND AREA OF LAGOS, SOUTHWESTERN NIGERIA. Nigerian Research Journal of Engineering and Environmental Sciences, 3(1), 416-427.en_US
dc.identifier.urihttps://ir.unilag.edu.ng/handle/123456789/5028
dc.language.isoenen_US
dc.publisherNigerian Research Journal of Engineering and Environmental Sciencesen_US
dc.subjectVertical electrical soundingen_US
dc.subjectShear wave velocityen_US
dc.subjectStandard penetration testingen_US
dc.subjectAnomalous zonesen_US
dc.subjectFoundation failureen_US
dc.titleEXPLORING THE LINKAGES BETWEEN GEOPHYSICAL AND GEOTECHNICAL PROSPECTION TO DETECT FOUNDATION FAILURE OF BUILDINGS IN A WETLAND AREA OF LAGOS, SOUTHWESTERN NIGERIAen_US
dc.typeArticleen_US
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