Pioneering Percussion Driven Earth Anchors (PDEA®) for 40 Years


Anchor Technical Information

How a Mechanical Anchor Works

There are three steps to the installation of an anchor system:

Driving the anchor
Removing the rods
The same three basic steps apply to the installation of all anchor systems, from the smallest S2 to the largest B10.

Typical Anchor Behaviour

Platipus Anchor Loadlock

Loadlock – The first stage is where a load is applied to rotate the anchor into its loadlocked position. Elements of both load and extension are present.

Platipus Anchor Compaction and Load

Compaction & Load – The second stage is where the anchor system is generating a frustum of soil immediately in front of the anchor. At this point load normally increases with minimum extension. The soil type will affect the overall extension.

Platipus Anchor Maximum Load Range

Maximum Load Range – The third stage is where the anchor produces its ultimate load. As the anchor load approaches the bearing capacity of the soil, the rate of increase in load will reduce until bearing capacity failure of the soil takes place.

Platipus Anchor Bearing Capacity Failure

Bearing Capacity Failure – Caution: If the mechanical shear strength of the soil is exceeded, the residual load will decrease with continued extension as the anchor shears through the ground.