FIU 3D Prints Seawall Tiles to Boost Marine Life

A pilot project at Morningside Park in Miami is evaluating the effectiveness of 3D printed concrete tiles attached to an existing seawall. Developed by Florida International University's Institute of Environment, these modular panels aim to enhance coastal defense structures by providing ecological benefits.

Traditional seawalls, while effective at preventing erosion and storm surge, offer no support for marine life. The BioCAP (Biodiversity Improvement by Optimizing Coastal Adaptation and Performance) initiative seeks to address this by retrofitting seawalls with interlocking tiles. These robotically printed units feature varied textures, grooves, and pools designed to create settling and hiding places for various marine species.

The geometry of the tiles is adapted to their position on the seawall. Upper tidal sections are designed for organisms like crabs and limpets, mid-level textures provide anchoring for oysters and barnacles, and submerged areas offer shelter for sponges and other sea life.

Preliminary laboratory wave testing indicated that the textured surfaces of the 3D printed tiles reflected less wave energy than plain concrete, suggesting a potential improvement in how seawalls manage incoming water. The project will now focus on long-term observation to document marine life colonization and assess the impact on water quality and shoreline behavior. Some installed panels are equipped with sensors to record environmental data.

The BioCAP project's appeal to coastal cities lies in its adaptive approach, utilizing existing infrastructure rather than requiring new construction. The findings from this pilot installation could influence future shoreline development in South Florida and other coastal regions facing similar environmental pressures. This initiative joins other additive manufacturing efforts in marine restoration, such as 3D printed reef structures and coral structures.