Database of Load Transfer Responses from Static Loading Tests on Instrumented Piles with and without Residual Load Correction-Article

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The paper presents a publicly available database of 68 static loading tests on instrumented driven piles, compiled from 38 literature sources. The piles include 36 concrete and 32 steel types, installed in plastic and granular soils and weathered rock. Embedment depths range from 6.7 to 69.5 m. The records include pile and site characteristics, available SPT/CPT data, pile-head load–displacement curves, and measured load distributions at each loading stage.<br /><br />The authors used these measurements to derive shaft resistance–displacement (t–z) and toe resistance–displacement (q–z) responses at instrumented depths. Because residual loads locked into piles after driving can distort inferred load transfer, they estimated residual-load distributions using the Fellenius method and recalculated corrected load distributions and t–z curves. Ignoring residual load can overstate shaft resistance and understate toe resistance.<br /><br />The database contains 539 instrumented pile-segment responses, with both uncorrected and residual-load-corrected results. It is intended to support research on pile load transfer and downdrag, preliminary design for piles in comparable conditions, and evaluation of load-transfer models used in engineering software. The data are freely accessible through DesignSafe-CI as project PRJ-4809: https://doi.org/10.17603/ds2-bez6-4812.

Keywords

instrumented driven piles

static loading tests

pile load transfer

shaft resistance

toe resistance

residual load correction

t-z curves

q-z curves

pile foundation database

DesignSafe-CI