threadbar and Rebar Bolts (SN-Anchors)
Fields of Application
- Proven system for systematic bolting
- Application in combination with cement or resin grouts
Basic Concept
Bolts increase the self-supporting ability of the ground and limit the loosening of blocks as well as shear displacements. Furthermore, the frictional force between individual ground layers is increased. Common bolt types, such as SN-Anchors or a threadbar, are fully grouted over the entire length and are usually installed un-tensioned. Cement or resin grouts are used as bonding media between borehole wall and tendon. Bolts can also be tensioned using an end-anchorage consisting of fast curing resin cartridges.
Main Advantages
threadbar Bolts
- Optimized ratio of bolt capacity to borehole diameter
- Continuous threaded bar allows length adjustment and subsequent extension on-site
- Wear-resistant coarse thread according to the requirements in Tunneling
Rebar Bolts (SN-Anchors)
- Field-proven bolting system
- Effective and standardized installation
- Embedding of the tension member in grout ensures optimal bond strength
- Low sensitivity concerning the actual diameter of the borehole
- ALWAGRIP special rib geometry for optimized bond strength available on request