AV Infratech Structural Systems Specialists in Post Tensioning
ROCK ANCHORING
ROCK ANCHORING
A ground anchor generally consists of a steel tendon (bar or strands) that is grouted into a pre-drilled hole in rock or soil. After the grout cures, the tendon is pulled into tension against a plate or block and is locked in place to resist movement of a retaining structure. These rock anchors or soil anchors are also referred to as “tiebacks”.
The basic components of a ground anchor are the: (1) bond length; (2) free stressing length; and (3) anchor head. The bond length, also called the “socket”, is that part of the anchor that transfers the tensile load from the steel tendon into the surrounding rock or soil. The anchor tendon is typically grouted into the bond length with a cement grout. The free stressing length is unbonded and is designed to stretch and transfer load from the grouted socket to the anchor head. The anchor head connects the anchor tendon to the structure being loaded and typically includes a nut and bearing plate.
ADVANTAGES OF ROCK ANCHORING
AV INFRATECH is involved in protection of Soil by Rock anchoring Process all over India , with their process to safeguard the Constrcution area with their Design and Working Method for easy and planned work for customer Satisfaction . we have wide customer for the Rock anchoring by Research and methodology .
AV INFRATECH uses 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. Some of the more common uses for rock anchors and bolts are to provide tiebacks for bridges, to increase stability of walls, slopes, and dams, to secure surface in mines and tunnels or to secure structures against forces from wind or vibrating machinery. AV INFRATECH Construction has years of experience in the installation, grouting, and tensioning of rock anchors of any length or load capacity.