Ground anchors are used for tensile stress. They transmit the forces from a structure (wall, foundation, etc.) to the ground in which they are anchored. They are generally prestressed.
Two operating principles
The ground anchor can be used to stabilise a retaining wall by transferring the forces caused by the natural thrust of the ground and the working loads beyond the slip circle. Forces are transmitted to the ground via the bond length. It is generally prestressed to control the movement of the wall during the various construction phases.
The purpose of the ground anchor is to generate a force across a structure, either to compensate for an uplift force or compress the foundation on the ground. It must mobilise a volume of ground with a su cient weight to o set the required force.
The bond length is designed to transmit the forces to the ground, and the free length is de ned according to the required volume of ground. The prestressing force plays a vitally important role in reducing or preventing vertical movement. In case of repeated forces, it eliminates the risks
of fatigue on the bonding.