Anchor Method

1. Ground (Earth) Anchor

The ground Anchors are basically devices used to transmit the forces to the soil by means of prestressed tendons to anchor the Structure to the ground or to retain the slopes from collapsing.
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 retaining wall during the various construction phases.
Earth anchors are used in both temporary or permanent applications, including supporting retaining walls, guyed masts, and earth retaining wall.

  

2. Rock Anchor

The rock anchors in civil and mining structures to counteract uplift forces acting on foundations and post-tension existing concrete structures. Rock anchors are made of high tensile steel, and typically they are anchored in sound bedrock by means of high strength cementitious grouting for foundations and through holes drilled into or through a structure for post-tensioning applications. For most applications the rock anchors are tensioned to a force higher than what is necessary to resist the foundation uplift force. When no tensioning is applied to the rock anchors they are called rock bolts. Both rock anchors and rock bolts are eventually grouted on their full length, however rock anchors may be grouted in two steps to allow for a certain free tensioning length after the first step.

  

 

3. Vertical (Buoyancy prevention) Anchor

The Vertical(buoyancy prevention)anchor method is to stabilize the structure against excessive stress, deformation, displacement, etc. that occurs in the structure by installing permanent anchors on the foundation floor and lower rock layer and fixing both ends for the buoyant part that is not in balance with the dead load of the structure. 
In this method, the stability of the structure's buoyancy, the internal stability of the anchor, the stability of the tensile member's design load, the stability of the adhesion between the grout and the rock, and the stress holding capacity according to load and time must be carefully reviewed, especially over time.