Ground Anchor
KGN designs, fabricates and installs two types of ground anchors – strand and bar anchors. The type of anchors used depends on if it is rock soil, for temporary or permanent use, whether or not it is to be tensioned, and whether or not permanent corrosion protection is required.
KGN offers all of these alternatives and can support a full anchor material supply service (anchors and accessories) with back-up including design services, advice consultancy, testing, installation, and tensioning and site supervision.
The construction of the KGN strand anchor depends on the type of rock or soil, the design, the corrosiveness of the environment, the presence of stray electrical currents and the intended service life. While temporary ground anchors require less or no corrosion protection, permanent ground anchors (with a service life exceeding two or three years) need to have a comprehensive permanent corrosion protection system.
The anchorage is the combined system of anchor head, bearing plate, and trumpet that is capable of transmitting the prestressing force from the prestressing steel (bar or stand) to the ground surface or the supported structures. The unbounded length is that portion of the prestressing steel that is free to elongate elastically and transfer the resisting force bond length to the structures. A bond breaker is a month plastic sleeve that is placed over the tendon in the unbounded length to avoid the prestressing steel from bonding to the surrounding grout. It enables the prestressing steel in the unbounded length to elongate without obstruction during testing and stressing and leaves the prestressing steel unbounded after lock –off
The tendon bond length is that length of the prestressing steel that is bonded to the grout and is capable of transmitting the applied tensile load into the ground. The anchor bond length should be located behind the critical failure surface.
The basic components of a grouted ground anchor include the:The anchorage is the combined system of anchor head, bearing plate, and trumpet that is capable of transmitting the prestressing force from the prestressing steel (bar or strand) to the ground surface of the supported structure. The unbounded length is that portion of the prestressing steel that is free to elongate elastically and transfer the resisting force from the bond length to the structure.
A bond breaker is a smooth plastic sleeve that is placed over the tendon in the unbounded length to prevent the prestressing steel from bonding to the surrounding grout. It enable the prestressing steel in the unbounded length to elongate without obstruction during and stressing and leaves the prestressing steel unbounded after lock-off.
The tendon bond length is that of the presterssing steel that is bonded and is capable of transmitting the applied tensile load into the ground the anchor bond length should be located behind the critical failure surface.
