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Preliminary studies on the geotechnical characteristics of the Niger delta subsoils
Abstract Borehole records from site investigation reports and actual drilling operations within the Niger delta were studied in order to quantify and correlate the regional geotechnical characteristics of the Niger delta subsoils. For foundation engineering purposes the Niger delta can be divided into three different zones, each with quite dissimilar stratigraphic and geotechnical characteristics: (i) sandy/clayey subsoil strata of the dry, flat plains; (ii) two-layer clay sand sequence of the fresh/salt water swamps; and (iii) three-layer, sand—clay—sand sequence of the coastal beaches/ridges. The foundation suitabilities of zones two and three are relatively low and in addition, may vary significantly within short lateral distances as a result of the frequent, erratic and lenticular occurrences of highly compressible organic clay and/or peat—clay mixtures. Well graded fine—coarse sand substrata with high bearing capacities usually occur at depths (5–30 m), but in the swamps and coastal regions, they may be intercalated with clays.
Preliminary studies on the geotechnical characteristics of the Niger delta subsoils
Abstract Borehole records from site investigation reports and actual drilling operations within the Niger delta were studied in order to quantify and correlate the regional geotechnical characteristics of the Niger delta subsoils. For foundation engineering purposes the Niger delta can be divided into three different zones, each with quite dissimilar stratigraphic and geotechnical characteristics: (i) sandy/clayey subsoil strata of the dry, flat plains; (ii) two-layer clay sand sequence of the fresh/salt water swamps; and (iii) three-layer, sand—clay—sand sequence of the coastal beaches/ridges. The foundation suitabilities of zones two and three are relatively low and in addition, may vary significantly within short lateral distances as a result of the frequent, erratic and lenticular occurrences of highly compressible organic clay and/or peat—clay mixtures. Well graded fine—coarse sand substrata with high bearing capacities usually occur at depths (5–30 m), but in the swamps and coastal regions, they may be intercalated with clays.
Preliminary studies on the geotechnical characteristics of the Niger delta subsoils
Akpokodje, E.G. (author)
Engineering Geology ; 26 ; 247-259
1988-05-30
13 pages
Article (Journal)
Electronic Resource
English
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