Sheet Pile Seal: A Locally Engineered Sheet Pile Sealant SolutionÂ-Paper

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The study evaluates SHEET PILE SEAL, an Australian-engineered sealant system designed to reduce leakage through steel sheet-pile interlocks. Such leakage can undermine dewatering, cause soil piping, and create environmental risks. Rather than using a generic sealant, the system can be tailored to groundwater pressure, ground conditions, and pile geometry.<br /><br />Performance was assessed through laboratory tests on 1.5 m interlock sections at hydrostatic pressures of 50–200 kPa, alongside field trials at Wisemans Ferry Cofferdam and The Entrance Cut-off Wall. Tests compared sealed interlocks with unsealed sections and traditional bitumen fillers.<br /><br />In laboratory testing, the bitumen-polymer formulation recorded no measurable flow at 100 kPa, while unsealed interlocks leaked rapidly at 50 kPa. At Wisemans Ferry, sealed sections remained dry under a 2 m water head, with leakage reduced from 20 L/min/m in unsealed sections to less than 0.1 L/min/m. Field observations also indicated that the sealant remained largely continuous after vibratory or impact driving. Its 72°C softening point helps limit washout or flow in hot conditions.<br /><br />The system can be applied cold in the field or yard, simplifying installation. The authors conclude that its reliable sealing performance and potable-water-contact certification make it suitable for infrastructure, mining, and flood-protection projects where water and soil retention are critical.

Keywords

sheet pile seal

steel sheet-pile interlocks

leakage reduction

dewatering

soil piping

groundwater pressure

hydrostatic testing

bitumen-polymer sealant

cofferdam field trials

flood protection