Experimental Evaluation of Effective Embedment Depth of Press-in Sheet Piling to Mitigate Liquefaction-Induced Foundation Settlements-Video

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Video Summary

The presentation investigated whether resin sheet piles can reduce liquefaction-induced settlement of shallow foundations, and how deeply they must extend into underlying dense soil. Researchers conducted five 1G shake-table tests using a scaled soil model: one without mitigation and four with sheet-pile embedment ranging from contact with the dense layer to 20 cm penetration.<br /><br />Sheet piles narrowed the excess-pore-pressure response and accelerated its dissipation. Foundation settlement decreased as embedment increased; penetration of 10 cm and 20 cm produced similar improvements, suggesting deeper installation may offer little additional benefit. Transverse foundation tilting was fully mitigated with sufficient penetration, while longitudinal tilting was reduced by about 80%. The maximum sheet-pile bending moment increased with embedment depth.<br /><br />The model used a rigid box, unlike the laminar box in the larger-scale reference study. Foam was added to reduce boundary effects, and baseline settlement—not pore-pressure response—was used for comparison. The findings apply to a single foundation; group effects and field-scale design require further investigation.

Keywords

resin sheet piles

liquefaction-induced settlement

shallow foundations

sheet-pile embedment

shake-table tests

excess pore pressure