An anchor comprises three parts:
An anchor is called “temporary” if it is to be used for a limited period of time, generally during construction of the structure. A “permanent” anchor is a ground anchor lasting more than two years or, more generally, a component required for the entire lifetime of the structure.
There are two families of anchors – active and passive:
Each anchor is protected against corrosion to prevent any impact on the system. This is defined based on two main criteria: the lifespan of the anchor and the aggressiveness of the environment.
Diaphragm walls – Sheet piling – Retaining walls – Underpinning curtain – Berlin-type walls and similar.
Anchoring of slabs below the water table – Pre-stressing of piles working in traction – Anchoring of narrow structures (pylons, tower buildings, chimneys, etc.) – Transmission of tension for rigging lines (suspension bridges, pylons, etc.).
Stabilisation of slopes and landslides (cracked rocks, cliffs, scree areas) – Consolidation of tunnels – Blocks of penstocks.
Transmission of pressure on vaults – Post-stressing of structures – Dam stability improvement.
Applies to a wide range of ground conditions
Compatible with numerous small diameter drilling techniques
A retaining structure can be stabilised by one or several levels of ground anchors
Permanent lifespan of anchors (subject to regular monitoring)