Earth Anchors in Marine, Shoreline and Underwater Applications 

Used in marine, shoreline or underwater applications – Platipus anchors have low environmental impact – no concrete blocks / reef damage


Stress Distribution and Bearing Capacity 

The stress distribution in front of a loaded anchor can be modelled using foundation theory. The ultimate performance of an anchor within the soil is defined by the load at which the stress concentration immediately in front of the anchor exceeds the bearing capacity of the soil.

Factors that will affect the ultimate performance of the anchor include:-

  • Shear angle of the soil
  • Size of the anchor

Platipus® anchors perform exceptionally well in a granular soil, displaying short loadlock and extension characteristics, a broad frustum of soil immediately in front of the anchor and extremely high loads.

Stiff cohesive soils, such as boulder clays, can also give outstanding results. However, weaker cohesive soils, like soft alluvial clays, can result in long loadlock and extension distances and a small frustum of soil in front of the anchor. Consequently these conditions require a larger size of anchor and if possible a deeper driven depth to achieve design loads.


  • Over 30 years experience 
  • Fast and easy installation 
  • Immediately quantifiable loads
  • Low enviromental impact – no concrete blocks / reef damage
  • Design assistance and anchor testing
  • On-site training and support – both wet and dry 
  • Bespoke installation equipment and tools
  • Online anchor specification equipment  


  • Piers
  • Floating Docks
  • Mooring Anchors
  • Channel Marker Buoys
  • Seawalls
  • Pipeline Outfalls
  • Pontoons
  • Flood Protection 
  • Sheet Piling – (PVC/Composite)
  • Hurricane Protection 
  • Overtopping
  • Boat ramps
  • Reventment Mats
  • Turbidity Barriers
  • Underwater Habitats 
  • Palm Tree Anchoring 

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