Dynamic rockfall protection

Elite GTS logoWe wish to present here the very efficient rock fall solution by the Company Elite, with whom we are in close contact. We have been working for them 15 years ago on one of their trial test and we regularly meet their sale representative, in NZ and in France recently.

They have specialized for 20 years on designing, conceiving, installing and testing rock fall barriers and screens in parallel with any other rock stabilization works. We suggest you have a look on their site www.elitegts.com, especially on their Elite 5,000kJ product.

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These products are more specialized than any other worldwide renowned barriers retailers for the following reasons:

  • lighter,
  • requiring less anchors,
  • with their own patented retaining mesh easy to install,
  • the net positioned above poles, though preventing them to be hit,
  • posts are not anchored: the post can be installed where needs to be, the best rock can be used to anchor cables as these can be extended
  • all absorption capacity relies on dissipators to dynamize the potential impact. Active rock catch is the key, as in rope access safety in general.

The Elite system is made up to be installed by abseil drilling means, closer to the potential instability, reducing cinematic and uncertainty on blocks travel.

Not exactly the same approach as those steel retailers who try to sell you bigger barriers built down the slope, close to the highways and involving lots of anchoring…

With kilometers already installed in Europe, this product has made its way.  There is surely a scope for them on the Milford and the West Coast roads. We are ready  to import and install them (only mesh, brakes and patent need to be brought in; the rest can all be done here: posts, cables and anchor systems).

Glenorchy Landslide Testing

In an emergency response to the rockslide on the Glenorchy-Queenstown road in May 2010, we intervened during the week-end to test the rock stability so that it reopened the following Monday (read the Otago Daily time article).

The helicopter dropped us off above the cliff, we scaled all the loose rocks. Then, we anchored the large rock of concern, so that a digger could tug it from the road with a cable. When no movement was observed, it was deemed safe enough to reopen the road, once cleared.