Proceedings - Seventh International Conference & Exhibition on Piling and Deep Foundations, 1998, Vienna, Austria, (DFI)
Continuous flight auger piles in the Woolwich and Reading Beds in the Isle of Dogs, London
Sergio A. Solera
At the South Quay Plaza development in the Isle of Dogs, London, Continuous Flight Auger (CFA) piles were chosen after the specified driven “shell” piles were found to be unsuitable for use in closely-spaced groups because of sever uplift during driving. Loading tests on preliminary and contract piles on 600 mm CFA piles in the Woolwich and Reading Beds permitted the working load to be upgraded from 900 kN to between 1800 kN and 2000 kN, with settlements at working load generally between 5 and 11 mm. Approximately 50% of the working load is estimated to be carried in end-bearing. This paper presents and discusses the results of the loading tests; the variations in behavior of the piles in relation to changes in ground conditions within the Woolwich and Reading Bed; and problems encountered during construction. Reference is also made to results of the loading test on a driven pile, which was subject to uplift due to the loading test on a driven pile, which was subject to uplift due to the driving of adjacent piles. This led to the change of foundation scheme from driven to CFA piles.
|article #335; publication #34 (IC-1998)|