piled jetty

A piled jetty is an engineering structure used in harbors and coastal works. It is an alternative to traditional dock and quay walls, eliminating the need for extensive work on or below the seabed. Piles, which can be made of timber, reinforced concrete, or steel, are driven into the seabed, and a deck is built on top, allowing construction to occur above water. This method is advantageous as piles can be driven from floating craft.1

Piled jetties serve multiple purposes:
* Berthing Ships: They provide a platform for ships to dock, especially in areas where deeper water is needed or where traditional harbor facilities are unavailable.12
* Channel Maintenance: In rivers, jetty-like structures called spurs or groins can be built to narrow the channel, concentrating the current to maintain a navigable depth.2
* Protection: Jetties can also act as breakwaters, protecting harbors or beaches from waves and sand drift.2

While timber is a common material due to its availability and ease of use, it can be susceptible to marine borers and decay. Reinforced concrete offers greater durability but can be more complex to modify for bracing and repairs.1