Editorial Note, Issue 2, Vol 17

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The editorial introduces five contributions in Volume 17, Issue 2 (2023), covering experimental findings, design methods, case-history lessons, and industry guidance for deep foundations.<br /><br />Shake-table tests found that helical piles performed better than slender-shaft piles in liquefiable ground. Increasing the number of helices reduced horizontal displacement and pile-head acceleration; triple-helix piles showed a 60% reduction in residual horizontal displacement compared with slender shafts. Peak bending moments commonly occurred at the boundary between dense and liquefiable soil layers.<br /><br />Field tests and calibrated numerical analyses of steel fin piles showed that fins half the pile length reduced lateral movement by about 50% relative to a pipe pile of the same diameter. However, H-pile and drilled-shaft alternatives had 40% less lateral deflection than the fin pile.<br /><br />A two-part consensus paper from DFI’s Rigid Inclusion Task Force discusses the mechanics, selection, and design of rigid inclusions, as well as construction, verification, and quality assurance.<br /><br />A New Jersey case history demonstrates how properly interpreting static load tests, downdrag forces, residual forces, and code requirements can prevent unnecessary pile lengthening and significant construction costs.<br /><br />Finally, analyses of nine full-scale piles for offshore wind applications improved capacity assessment by accounting for pile–soil roughness. A boundary-surface p-y model was also presented as an efficient, calibratable approach for complex soil profiles and uncertain soil properties.<br /><br />The editors note that the journal has been accepted into the Scopus research database.

Keywords

deep foundations

helical piles

liquefiable ground

rigid inclusions

steel fin piles

static load tests

offshore wind piles

pile-soil interaction

boundary-surface p-y model

Scopus indexing