Geophysical and geotechnical assessment of a failed canal.
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Date
2015
Authors
Adeoti, L
Kehinde, I
Jalekun, A.A
Adegbola, R.B
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Exploration Geophysicists
Abstract
The integration of geophysical and geotechnical methods
was used to assess a failed canal at Ijora Badia, Lagos
Nigeria. The subsurface information was obtained by using
two electrode arrays for the resistivity data acquisition.
Geotechnical data were obtained through four boreholes via
percursion drilling within the study area. The integrative
approach reveals that the subsoil materials consist of peat,
organic silty clay, clayey sand, silty sand, and sand. The
study shows that low resistivity values exhibited by soft
clay / peat and are possible cause of the collapse. The
analysis of the subsoil conditions based on the proposed
load of 60 kN/m2
imposed by canal structure on the peaty
soil reveals settlement values of 365-843 mm which are too
excessive for shallow foundation types. Also lateral and
vertical thicknesses of the peat preclude the use of piling
and vibroflotation. Thus, ground improvement using
chemical grounding is proposed.
Description
Keywords
canal , Geotechnical , Geotechnical , Resistivity
Citation
Adeoti*, L., Kehinde, I., Jalekun, A. A., & Adegbola, R. B. (2015, July). Geophysical and geotechnical assessment of a failed canal. In Near-Surface Asia Pacific Conference, Waikoloa, Hawaii, 7-10 July 2015 (pp. 276-279). Society of Exploration Geophysicists, Australian Society of Exploration Geophysicists, Chinese Geophysical Society, Korean Society of Earth and Exploration Geophysicists, and Society of Exploration Geophysicists of Japan.