Installation Techniques of Pile Foundations on Some Low-bearing Capacity Soils in Nigeria

Abstract

This paper presents some techniques used in the installation of pile foundations to support foundation and structural loads on some low bearing capacity soils in Nigeria. Depending on use, soil conditions (especially the physico-mechanical properties of the soil), expertise and cost, driven piles installation techniques mostly used in Nigeria include dropping weight (hammer), explosion, vibration, jacking and jetting. Installation techniques for bored piles include mechanical auger (continuous/straight flight auger), cable percussion drilling as well as under-reaming for large diameter piles. Recently, newer installation techniques such as oscillated piling technique, GeoJet piling technique as well as Tubex grout injection piling technique were introduced to the piling work in Nigeria..