A Rockfall Barrier installation of our MacRO RMC300 was recently installed as a “showpiece” in Maccaferri’s factory to act as a sample for clients and contractors alike.
At Maccaferri, we treasure our customer’s feedback and try to answer their queries to the best of our capacity. One of the more common questions raised by our clients is whether they can visit an actual RMC dynamic rockfall barrier installation.
This gives them the opportunity of seeing what a barrier looks like in the field and allows them to study the various elements which they may have to take install and maintain themselves correctly.
The very nature of Maccaferri’s rockfall installations in the Philippines makes it difficult for clients to visit the sites, as they are located commonly in remote provinces on steep grades and escarpments that require extensive traveling to reach.
Faced with this situation, Maccaferri Philippines Manufacturing, Inc. determined the need to erect a section of a MacRO RMC300/A barrier. In doing so, they intend to expose one of Maccaferri’s most prominently used products the factory, thus evoking an appreciation for the product by the workforce, and making it easier for interested customers and installing contractors to see the barrier for themselves. The erected section of the barrier is 5 meters high, 10 meters broad and rated as a 3,000kJ barrier.
Maccaferri’s RMC barriers are available to suit whether the installation is on rock or soil and whether the barrier is fitted with upslope cables. Typically, facilities in rock require holes to be drilled to preset depths (depending on the height and capacity of the barrier).
Because the factory installation was on soil (and taking into account time, availability of drilling rigs and equipment and the fact this barrier will never be called upon to stop actual falling rocks and boulders), some compromises were made regarding the depth of the anchors.
After carefully marking out the locations of the foundation plates and anchors, the ground was watered for softening purposes before hammering in the threaded bars and pipes. The bars and tubes were then removed, leaving holes for the insertion of flexible anchors which were grouted in position.
A template was made to ensure that the base plates could be installed in exactly the right place. These were secured to the ground before the posts being attached. The posts were then moved to the upright position by connecting it with two upslope cables per post. Energy dissipating devices—components are featuring in of all Maccaferri barriers—were then attached to longitudinal wires.
The final part of the rockfall barrier is the net. For this barrier, a net ring mesh of 350mm rings was overlaid with Maccaferri’s 2.7 gauge, 8×10 double twist wire mesh. Just like the barriers we provide for our real projects, all parts are corrosion resistant such that Maccaferri barriers can adequately withstand the test of time.
The installation of this barrier used locally available resources. It has already proved to be a wholly worthwhile project that has provided an excellent sample installation for the customers who have already visited it. It also allows our technical personnel and engineers to answer specific questions about installation techniques and methodology.
For more information, please contact us.