Innovation :

• the barrier comprises a post mounted on a tripod or bipod base,

• the base is fixed to the ground by a central soil or rock anchor acting in tension  through an elastomer bearing concentric to the anchoring bolt (class 3),

• the elastomer bearing enables the support post to articulate on the base.

 
Technical Advantages :

• the reversal of the articulated support during impact dissipates energy and increases the capacity of the barrier,

• the tangential forces to the ground are supported through a mechanism under the base that ensures the base anchor is only stressed in tension.

• the netting support system, complete with cable stays, can be pre-assembled prior to being transported by helicopter to the site where the assembly can be mmediately mounted on to the pre-drilled anchor,

• the anchors can be systematically and quickly tested to their design load using a hydraulic jack reacting against the post base.
  

Cost reduction :

• The reduction in the number of anchors required for each post significantly decreases installation costs,

• pre-assembly of the system prior to transportation reduces installation time,

• Reduced installation time means reduced labor costs and disruption time.

Minimal visual impact:

• the posts of the ELSA® rockfall barrier are made of treated round timber and blend with the natural vegetation,

• the reduction in the number of anchors required minimizes the need for vegetation clearing.

ELSA 50kJ - Barrage de Serre-Ponçon (05)
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