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Technical paper: Driven cast insitu piles, the CPT and the SPT – two case studies

Tony Suckling, technical manager, Cementation Foundations Skanska. This paper was first published in GE’s October 2003 edition.

Prelude

The ideas for the work described in this paper originated from the late Dr Ken Fleming, Cementation Foundation Skanska’s chief engineer.

Introduction

Two case studies are presented in this paper; at Ringsend, near Dublin in the Republic of Ireland; and at Gravesend, Kent, in England.

At both sites the driving and load bearing characteristics of driven cast insitu piles in cohesionless deposits was found to directly correlate with the results of electric static cone penetration tests.

It was found that standard penetration test results should be considered with caution for driven cast insitu piles in cohesionless deposits, as they may prove to be unrepresentative of the driving and load bearing characteristics of the piles. 

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