Insights on Dynamic Testing and Its Implications for Geotechnical Engineering

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In a discussion led by Mike Turner at the IWM 2003, the reliability of dynamic testing compared to static tests is examined. While accuracy is commendable when benchmarks are established with static tests, there remains a divide in consensus among professionals in the field. With costs running at 10% to 15% of static tests, dynamic testing is increasingly favored. Insights from recent micropile projects show that elastic settlements have exceeded theoretical predictions, highlighting the need for careful consideration of elastic deflections to maintain the serviceability of piles.

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May 04, 2026

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Insights on Dynamic Testing and Its Implications for Geotechnical Engineering

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Dynamic Testing Paul Woodfield for Mike Turner Applied Geotechnical Engineering, Ltd.
Mike Turner’s thoughts on issue for discussion at IWM 2003 • Accuracy is good when comparisons are made with static tests • Not everyone agrees • Costs are 10 to 15% of a static test and will continue to gain favour
Based on recent micropile projects monitored by Applied Geotechnical (rock socketed/ overburden depths up to 20 m), elastic settlements have been greater than “theoretical predictions” • Care needed to ensure elastic deflections do not undermine serviceability of pile