Pile driveability response in low strength, layered soils like those encountered offshore near the Taiwanese west coast is still unknown. These silty and micaceous, soils have caused considerable problems as several piles have been exposed to pile runs during their installation due to inaccurate predictions of the soil resistance to driving (SRD). A more robust and comprehensive prediction model could lead to a more cost-effective installation strategy with a better prediction of blow counts, self-weight penetration and pile runs. This paper presents a pile driveability study for those challenging, Taiwanese soils. Field driving records from installation of 84 pin-piles are compared against modelled SRD profiles calculated via the well-established CPT-based method of Alm & Hamre. A reasonable match with the back-analysed SRD profile was observed, with a trend of Alm & Hamre to underestimate the SRD for coarse-grained materials and overestimate the SRD for fine-grained material.
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Nielsen et al. (2024) studied this question.
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