Geotechnical Rock Bolting & Rockfall Protection Systems
Our highly skilled rock bolting team use passive or active netting systems to control and prevent rockfall from natural or man-made rock slopes. Bolting often is preceded by scaling and bulk rock removal.
All sectors and locations – AG have installed bolts on railway, highway, coastal, residential and commercial sites. From ground level to at height, above water etc.
Scaling and bulk rock removal – Removal of loose rock and debris from the slope prior to stabilisation or use of a netting system. This can be done mechanically or by hand and is typically supervised by rope access operatives.
Mechanical installation – Rock bolts installed by mechanical means either attached to plant or a steel wheeled frame / sledge.
Long reach capability – drills can be mounted to long reach excavators, telehandlers and cranes. AG have undertaken a project where a 38m reach was needed.
Drilling Equipment – Ripamonti top hammer pneumatic and hydraulic drills with draw stroke of between 1 and 4m length.
Diameter and length – from 33mm to 100mm diameter and up to 10m length.
Variety of materials – Use of solid core bars, prestressing steel bars, GRP bars and stainless bars. Mechanical anchors with solid bar or cable fixings. Hexagonal and diamond meshes.
Grouting – Post grouting systems. Resin grout systems (pumped and cartridge).
Testing – In house capability to undertake a variety of pull tests and produce test reports with analysis.
