How does a piled jetty avoid the need for major excavation below the seabed?

A piled jetty avoids the need for major excavation below the seabed because its piles can be driven directly into the ground from floating craft. Once the piles are driven to a sufficient depth to ensure lateral stability, the deck and superstructure are constructed entirely above the water level.1

This method eliminates the complex and costly operations typically required for traditional dock or quay wall construction, which often involve significant work on or below the seabed. While this approach is highly effective, it does require that the seabed composition be amenable to pile penetration. In some cases, bracing and stiffening attachments are added to the piles during extremely low tides, but the primary structural assembly remains a surface-level operation.1