An assessment of shaft capacity design methods for driven piles in chalk
An assessment of shaft capacity design methods for driven piles in chalk
This study provides an assessment of laboratory-based and CPT-based design approaches for determining shaft capacity of driven piles founded in a weathered chalk with grades Dc and Dm. A suite of in-situ and laboratory tests were undertaken on chalk to characterise the geotechnical properties of material for subsequent determination of shaft axial capacity based on the two design approaches. The analysis reveals that the laboratory-based method tends to predict higher short-term shaft capacity compared to the CPT-based approach. To address this, a framework for converting laboratory results to an equivalent depth in the field has been developed and is discussed in this paper. When applying this framework to compare the predicted long-term shaft capacities, the CPT-based approach yielded higher estimates of shaft capacity compared to the laboratory-based method in compression loading whilst tendency was not clear in tensile loading.
Kathy Z. Wen; A. Rismanchian; Christophe Noel; Abbass Tavallali
5th International Symposium on Frontiers in Offshore Geotechnics (ISFOG2025)
7 - Pile design and installation in challenging soil conditions: glauconite, carbonated soils, cemented soils, gravels and rocks
https://doi.org/10.53243/ISFOG2025-532
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