Assessment of Subsurface Conditions in a Coastal Area of Lagos using Geophysical Methods
An integrated geophysical and geotechnical survey was carried out at Magodo Estate, Lagos, Nigeria. The buildings in this area are either sinking or intensively affected by severe cracks showing structural instability. The survey was aimed at characterizing the shallow subsurface in order to delinea...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Faculty of Engineering and Technology
2015-12-01
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| Series: | Nigerian Journal of Technological Development |
| Subjects: | |
| Online Access: | http://njtd.com.ng/index.php/njtd/article/view/20 |
| _version_ | 1828322568331853824 |
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| author | K. F. Oyedele S. Oladele C. Okoh |
| author_facet | K. F. Oyedele S. Oladele C. Okoh |
| author_sort | K. F. Oyedele |
| collection | DOAJ |
| description | An integrated geophysical and geotechnical survey was carried out at Magodo Estate, Lagos, Nigeria. The buildings in this area are either sinking or intensively affected by severe cracks showing structural instability. The survey was aimed at characterizing the shallow subsurface in order to delineate features that may have caused structural instability that led to cracking and sinking of the residential buildings in the area. To image the subsurface, resistivity profiling (2-D) using a Wenner array and Cone Penetration Test (CPT) was carried out on five profiles of length 180 m each. The acquired data were processed and interpreted integrally to image the shallow geotechnical setting of the site. Integrated interpretation led to the delineation of low resistivity, low bearing capacity clay which is identified as the main cause of instability that resulted in potentially dangerous cracking and sinking of residential buildings in the area. |
| first_indexed | 2024-04-13T18:43:12Z |
| format | Article |
| id | doaj.art-0d21bdc176dc4760b2eb0ac1a0a28be4 |
| institution | Directory Open Access Journal |
| issn | 2437-2110 2437-2110 |
| language | English |
| last_indexed | 2024-04-13T18:43:12Z |
| publishDate | 2015-12-01 |
| publisher | Faculty of Engineering and Technology |
| record_format | Article |
| series | Nigerian Journal of Technological Development |
| spelling | doaj.art-0d21bdc176dc4760b2eb0ac1a0a28be42022-12-22T02:34:40ZengFaculty of Engineering and TechnologyNigerian Journal of Technological Development2437-21102437-21102015-12-01122364110.4314/njtd.v12i2.1Assessment of Subsurface Conditions in a Coastal Area of Lagos using Geophysical MethodsK. F. Oyedele0S. Oladele1C. Okoh2Department of Geosciences, University of Lagos, Nigeria.Department of Geosciences, University of Lagos, Nigeria.Department of Geosciences, University of Lagos, Nigeria.An integrated geophysical and geotechnical survey was carried out at Magodo Estate, Lagos, Nigeria. The buildings in this area are either sinking or intensively affected by severe cracks showing structural instability. The survey was aimed at characterizing the shallow subsurface in order to delineate features that may have caused structural instability that led to cracking and sinking of the residential buildings in the area. To image the subsurface, resistivity profiling (2-D) using a Wenner array and Cone Penetration Test (CPT) was carried out on five profiles of length 180 m each. The acquired data were processed and interpreted integrally to image the shallow geotechnical setting of the site. Integrated interpretation led to the delineation of low resistivity, low bearing capacity clay which is identified as the main cause of instability that resulted in potentially dangerous cracking and sinking of residential buildings in the area.http://njtd.com.ng/index.php/njtd/article/view/20Geo-materialsresistivitygeotechnical |
| spellingShingle | K. F. Oyedele S. Oladele C. Okoh Assessment of Subsurface Conditions in a Coastal Area of Lagos using Geophysical Methods Nigerian Journal of Technological Development Geo-materials resistivity geotechnical |
| title | Assessment of Subsurface Conditions in a Coastal Area of Lagos using Geophysical Methods |
| title_full | Assessment of Subsurface Conditions in a Coastal Area of Lagos using Geophysical Methods |
| title_fullStr | Assessment of Subsurface Conditions in a Coastal Area of Lagos using Geophysical Methods |
| title_full_unstemmed | Assessment of Subsurface Conditions in a Coastal Area of Lagos using Geophysical Methods |
| title_short | Assessment of Subsurface Conditions in a Coastal Area of Lagos using Geophysical Methods |
| title_sort | assessment of subsurface conditions in a coastal area of lagos using geophysical methods |
| topic | Geo-materials resistivity geotechnical |
| url | http://njtd.com.ng/index.php/njtd/article/view/20 |
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