Abstract
The Norwegian Geotechnical Institute (NGI) has carried out an extensive series of static and cyclic axial load tests on well instrumented piles, respectively in a soft plastic clay deposit at Onsoy (Norway), a silty clay deposit at Lierstranda (Norway) and a mainly clayey silt deposit at Pentre (UK). Three types of test piles were used. Test piles type A were a closed-ended 219 mm o.d. steel pipe pile with length of 10 m. They were driven through cased boreholes to tip penetrations of 15 to 37.5 m. Test Pile B was a tubular open-ended steel pile with o.d. of 812 mm driven to tip penetration of 15 m. Test Pile C, only used at Onsoy, was of the same type as Pile A, but was 30 m long and driven to 35 m tip penetration.
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