Rock Bolts
Foundation Bolt
Solid unthreaded bar for full-length grouted pre-support.
The Foundation Bolt is a solid, unthreaded reinforcement bar designed for full-length cementitious-mortar grouting. It is typically installed around tunnel portals before the first blast or ahead of the tunnel face as pre-support in very poor and unstable rock.
- Full-length grout for effective load transfer
- Solid, robust reinforcement element
- Bevelled end assists installation
- Suitable for demanding ground
- Lengths up to 12 m
- Pc-Coat corrosion protection
Technical data
- Range
- M25 / M33 / M40
- Steel
- B500NC or FE550D
- Available lengths
- 1–12 m
- Design
- Solid, unthreaded rebar with bevelled end
- Corrosion protection
- Hot Dip Galvanizing NS-EN-ISO 1461, Epoxy Coating NS-EN 13438
Applications
- Tunnel portal reinforcement
- Pre-support ahead of the tunnel face
- Construction in very poor rock
- Stabilization before blasting
- Underground openings and caverns
- Weak and fractured ground
- Temporary and permanent reinforcement
- Forepoling and face-support systems
