Geophysical investigation of Oke-Agbe-Oyin Road failure using VLF and double dipole

Abstract

The result of this paper is to establish a consistent approach to geophysical handling of road failure using electrical Resistivity method-Double Dipole and Electromagnetic method- VLF (Very Low Frequency). The work was done along Oke-Agbe Road in Ondo State. Computer iterated data from the study area enabled the delineation of the investigated portion of the road into highly weathered and non weathered zones with Resistivity values ranging from 37 – 595 Ωm. The form of road failure identified in this study is due to subsidence arising from differential settlements associated with clayey, fairly thick, geotechnical weak and low resistivity near surface horizon. The results obtained clearly demonstrates the relevance this kind of study in highway feasibility studies and roadway evaluation. JONAMP Vol. 11 2007: pp. 411-414