Anchors are tension elements typically post-tensioned to transfer loads from a structure to competent soil or rock stratum.
how they work:
Anchors are used to provide preloading of structural systems by applying a lock-in tension load in the
anchor tendon, which is then bonded to competent rock or soil using rock or cement-based grout. The
pre-applied load in the tendon helps to limit structure movement.
why you need them:
Anchors are used to support walls against lateral earth and water pressures in earth retaining structures,
to secure landslides, tunnels, shafts and deep excavations. They are also used to provide resistance for
tensile uplifts on basements due to elevated groundwater and overturning or sliding forces in dam