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Instability investigation of some residual soil slopes in road cuts around Lokoja, Nigeria

  • Ojulari A. Y. 
Article

Summary

Nine slopes along the newly constructed Trunk ‘A’ road through Lokoja were investigated. A total of 20 soil samples were collected for standard loboratory tests and direct shear tests.

Two of the slopes were studied in more detail (one each representing sedimentary and Basement Complex regions). It has been found that the effect of parent rocks plays a large part in the instability and also the differential processes of failures of some of the slopes studied.

Keywords

Shear Strength Nigeria Parent Rock Residual Soil Direct Shear Test 

Recherche sur l’Instabilite de Quelques Talus Formes de Sols Residuels dans les Tranchees de Route Pres de Lokoja (Nigeria)

Résumé

La construction de la nouvelle route dite “tronc A” vers Lokoja a permis d’étudier neuf talus. Au total, vingt échantillons de sols furent prélevés en vue des tests standard au laboratoire et d’essais directs de cisaillement.

Deux des talus furent étudiés plus en détail (l’un d’eux est représentatif d’une région sédimentaire, l’autre du Complexe de Base). Il résulte de ces observations que la nature de la roche-mère semble jouer un rôle important sur l’instabilité des talus étudiés et aussi sur les processus différentiels d’effondrement.

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References

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Copyright information

© International Association of Engineering Geology 1978

Authors and Affiliations

  • Ojulari A. Y. 
    • 1
  1. 1.Nigerian Steel Development AuthorityKadunaNigeria

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