Construction and bearing behaviour of bored piles at the Lekki-Ikoyi cable-stayed bridge in Lagos, Nigeria

Axel Nernheim, Cezary Slominski, Roberto Cudmani, Florian Unold

In the proceedings of: GeoManitoba 2012: 65th Canadian Geotechnical Conference

Session: T2A - Foundations III

ABSTRACT: -stayed bridge, the Lekki-Ikoyi Bridge, is being built in Lagos. It connects the city districts of Lekki in the east and Ikoyi in the west, which are separated by a lagoon.The bridge consists of a 720 m long approach bridge on the Lekki side with effective spans of 19 m and a 635 m long main bridge on the Ikoyi side which is erected in segmental construction. Part of the main bridge is a 225 m long section which is built as a cable-stayed bridge with a central pylon. This paper gives an overview of the project and the design of the foundation. Construction and bearing behaviour of the piles is described with a focus on the pylon foundations. Results of static pile load tests as well as from the monitoring program are shown.

RÉSUMÉ: premier pont à haubans en Nigeria le pont Lekki-Ikoyi à Lagos est i-kki, la travée tronçon de 225 m du pont principal est effectué comme pont à haubans avec un pylône central. Cette contribution donne un aperçu du projet et du dimensionnement de la fondation profonde du pont. En outre, elle traite la construction et le transfert de charges des pieux focalisant sur la fondation du pylône central. Les résultats des essais de chargement statique des pieux et du programme de monitoring et de surveillance effectué sur site sont présentés.

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