@article{MAKHILLRJAS2008328899,
    title = {Geophysical Investigation of Road Failures in the Basement Complex Areas of Southwestern Nigeria},
    journal = {Research Journal of Applied Sciences},
    volume = {3},
    number = {2},
    pages = {103-112},
    year = {2008},
    issn = {1815-932x},
    doi = {rjasci.2008.103.112},
    url = {https://makhillpublications.co/view-article.php?issn=1815-932x&doi=rjasci.2008.103.112},
    author = {Michael Ilesanmi Oladapo,Martins Olusola Olorunfemi and},
    keywords = {Roadway,failure,resistivity,dipole-dipole,wenner,faults},
    abstract = {Causes of failures on three roadways located in the Precambrian Crystalline Basement Complex area of Southwestern Nigeria have been investigated in this study. The electrical resistivity method involving dipole-dipole and Wenner Vertical Electrical Sounding (VES) techniques were utilized. The failed segments of the roadways are characterized by relatively low resistivity (mostly < 200  -m) with the stable zones typically resistive (>> 400  -m). Forms of road failures identified from the study are failures arising from differential settlement on road cut sections that intercept clayey saprolite with high moisture content as observed on Igbaraoke-Igbaraodo roadway; failures precipitated by differential settlements associated with significantly thick, low resistivity clay topsoil as observed on Itaogbolu portion of the Akure-Ado Ekiti roadway and failures initiated and sustained by geological features such as lithological contacts/faults, inclined interfaces between basement rocks and or collapse subsurface strata (e.g., cavity or sinkhole structure) as observed on study segment of Igbaraodo-Ikere Ekiti roadway. Pre-construction geophysical studies of roadways could effectively compliment routine geotechnical studies.}
    }