Abstract
Most of the materials that constitute the uppermost formation (Benin Formation) of the lower Niger Delta in South-Eastern Nigeria are sands, shales and clays that occur at various depths within the formation. These subsurface materials have served as bearing media for both shallow and deep foundation structures.
The potentials for liquefaction of these often loose and saturated sandy units that occur within the uppermost formation have been assessed for a case where a 1020 KVA Power Generating Set was to be sited.
This Paper attempts to present the results of both field and laboratory tests that have been used to assess the liquefaction potentials of the sandy units at Bori, located within the South-Eastern lower Niger Delta of Nigeria.
Résumé
La plupart des matériaux qui constituent la formation la plus supérieure (Formation du Benin) du delta du Niger au Sud-Est du Nigéria, sont des sables, des argilites et des argiles qu’on trouve à des profondeurs variables dans cette formation. Ces matériaux ont constituté les sols de fondation aussi bien pour des fondations superficielles que profondes.
Les risques de liquéfaction des niveaux sableux, souvent lâches et saturés ont été étudiés lorsqu’il s’est agi d’implanter une centrale électrique.
L’article présente les essais in situ et en laboratoire qui ont été réalisées pour cette évaluation.
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References
CASAGRANDE A. (1976): Liquefaction and cyclic Deformation of Sand —Critical Review. Harvard Soil Mechanics Series No. 88 Harvard University, Cambridge, MASS.
CASTRO G. and S.J. POULOS (1976): Factors affecting Liquefaction and cyclic mobility. Symposium on Soil Liquefaction, ASCE National Convention, Philadelphia, pp. 105–138.
CHRISTIAN J.T. and W.F. SWIGER (1975): Statistics of Liquefaction and SPT Results. J. Geotechnical Engineering Division. ASCE. Vol. 101 No. GT11, pp. 1135–1150.
FINN W.D.L., P.L. BRANSBY and D.J. PICKERING (1970): Effects of Strain History on Liquefaction of Sands. J. Soil Mech. Found Div. ASCE Vol. 96, No. SM6, pp. 1917–1934.
FINN W.D.L., K.W. LEE and G.R. MARTIN (1976): Seismic Porewater Pressure Generation and Dissipation, Symposium on Soil Liquefaction; ASCE National Convention, Philadelphia, pp. 169–198.
GUPTA M.K. (1979): Liquefaction of Sands During Earthquakes. Ph.D. Thesis, University of Roorkee, Roorkee, India.
HARDIN B.O. (1978): The Nature of Stress-strain Behaviour of Soils; State of the Art Report, Proc. ASCE Specialty Conference on Earthquake Engineering and Soil Dynamics Pasadena, pp. 3–90.
HARDIN B.O. and W.L. BLACK (1969): Closure to Vibration Modulus of Normally Consolidated Clays. J. Soil Mech. Found. Div. ASCE Vol. 95 No. SM6, pp. 1531–1537.
MILLER G.F. and H. PURSEY (1954): The Field and Radiation Impedance of Mechanical Radiators on the Free Surface of a Semi-infinite Isotropic Solid, Proc. R. Soc. London, Vol. 223, pp. 521–554.
MILLER G.F. and H. PURSEY (1955): On the Partition of Energy between elastic waves in a semi-infinite Solid. Proc. R. Soc. London, Ser. A. Vol. 233, pp. 55–69.
PECK R.B., W.E. HANSON and T.H. THORNBURN (1974): Foundation Engineering, Second Edition, John Wiley and Sons Inc. New York 514 pages.
PRAKASH S. (1981): Soil Dynamics, McGraw-Hill Book Company, New York, 426 pages.
PRAKASH S. and M.K. GUPTA (1970): Report on Dynamic Properties of Soil for Diesel Power House Nakodar, Earthquake Engineering Studies, School of Research and Training in Earthquake Engineering, University of Roorkee, Roorkee, India.
PRAKASH S. and M.K. GUPTA (1971): Report on Dynamic Properties of Soils for Diesel Power House Sirhind. Earthquakes Engineering Studies, School of Research and Training in Earthquake Engineering, University of Roorkee, Roorkee, India.
RICHART F.E., J.R. HALL Jr., and R.D. WOODS, (1970): Vibrations of Soils and Foundations. Prentice-Hall Inc., Englewood Cliffs, New Jersey.
SEED H.B. (1976), Some aspects of sand liquefaction under cyclic loading: Conference on Behaviour of off-shore structures. The Norwegian Institute of Technology, Norway.
SEED H.B. (1979); Soil liquefaction and cyclic mobility evaluation for level ground during earthquakes. J. Geotech. Engineering Dic. ASCE Vol. 105, No. GT2, pp. 201–255.
SEED H.B. and I.M. IDRISS, (1967); Analysis of soil liquefaction—Niigata Earthquake. J. Soil Mech. Found. Eng. Div., ASCE. Vol. 93, No. SM3, pp. 83–108.
SEED H.B. and I.M. IDRISS (1971); Simplified procedure for evaluating soil liquefaction potentials. J. Soil Mech. Found Eng. Div. ASCE, Vol. 97, No. SM9; pp. 1249–1273.
SEED H.B. and K.L. LEE (1966); Liquefaction of saturated sands during cyclic loading. J. Soil Mech. Found. Eng. Div.; ASCE, Vol. 92, No. SM6, pp. 105–134.
SHELL B.P. Petroleum Development Company of Nigeria Geological Series Maps (1962); Sheet 84—Port Harcourt.
TEKS Geotechnical Consultants (1988); Subsurface investigation for the generator house foundation at the Rivers State Polytechnic Bori. Report of investigation for the Govering Council, Rivers State Polytechnic, Bori. 132 p.
WOODS R.D. (1968); Screening of surface waves in soils. J. Soil Mech. Found. Div., ASCE Vol. 94, No. SM4, pp. 951–979.
WOODS R.D. (1978); Measurement of Dynamic soil properties—state of the Art. Proc. ASCE specialty Conference on Engineering and soil Dynamics, Pasadena.
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Teme, S.C. Liquefaction potentials of a sandy substratum in the south-eastern lower Niger Delta of Nigeria. Bulletin of the International Association of Engineering Geology 42, 85–94 (1990). https://doi.org/10.1007/BF02592623
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DOI: https://doi.org/10.1007/BF02592623