Rock Catch Barrier's
Over the last decade, RIX has witnessed an increase in the requests for Rock Fall Catch Barrier’s. Generally, clients elect for the installation of a rock catch barrier when the defective area is:
- Too large
- Too high, or
- Too expensive to be treated.
A catch barrier is an engineered structure or barrier between the hazard and the target. Clients can design their own barrier, but most elect to purchase a proprietary system from a supplier, which the client simply needs to install on site. The fence normally requires minor site preparation and rock anchors for support.
Manufactures normally rate their systems in kilojoules (kJ) and rate the geological hazard and select a system to suit. If suitable, RIX recommends scaling the defective area prior to fence installation to greatly extend the service life of the fence.
Considerations for good catch fence design may include:
- The size the hazard
- The speed the hazard will be travelling
- Whether or not the hazard is hard or sharp
- Single event hazards (e.g. single rockfall) or multiple event hazards (e.g. landslide)
- Where the hazard will strike the fence
- What happens if the hazard strikes a post, or
- How long the fence will be required.
As can be seen above, rock catch fences require a high degree of engineering, design and field testing that can exceed the cost of the catch fence, This may deter clients from designing their own fences.
Centre: This rock catch barrier protects a roadway from a geologically defective mountain slope. The fence was the best solution on this site for environmental and budgetary factors.
Bottom: A recently completed Rock Catch barrier in Queensland. This project saw preliminary scaling of the slope, rock bolting of isolated hazards and rock anchoring for the fence foundations. Our Rope Access Technicians prove invaluable in the successful completion of rock catch fence installations.