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   HEA Panel

HEA Panel

THE HEA PANEL IS A SURFACE STABILISATION SYSTEM
FOR ROCKY SLOPES THAT ARE UNSTABLE
DUE TO FRACTURING OR ALTERATION.
IT COMBINES THE HIGH RESISTANCE OF THE CABLE WITH THE
SPECIAL FEATURES OF A SOFT STEEL WIRE KNOT

HEA cable panels are manufactured with twisted wire cables, knotted with reinforced Galfan® galvanized wire of 3 mm. They are anchored to the ground by pins. The function of the mesh is to hold the material that comes loose from the unstable ground between the anchorages. The pins in the rock hold the mesh and, in loose gcround with soil nailing, guarantee the overall stability of the slope. A Triple Twist Mesh is placed under the HEA Panel to hold the smaller sized rock-falls.

From the point of view of thrusts, the HEA Panel may be considered a passive intervention, as it acts after a fall and not before. Thus, it is a system that acts when the ground begins to move, without exercising a permanent pressure or thrust.
The safety tests have proven that HEA Panels are more reliable and have superior technical characteristics to the traditional cable panels joined by staples.
REAL TESTS IN SITU

Comparative chart of the load-deformation curves for different products tested at the test field of Pont Boset - Aosta (Italy). These products are:
HEA Panel 300/10, SteelGrid BO 150, Triple Twist Mesh 8x10 and Simple Twist Mesh of high resistance wire. The graph shows the major difference in deformation (especially at low loads) between the HEA Panel and the other products, especially Simple Twist Mesh.

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TEST SOBRE LOS ELEMENTOS

Comparativa de resistencia entre el Panel HEA, elaborado con doble nudo de alambre galvanizado Galfan® y un panel de cable con grapa. En el gráfico y en las imágenes se puede apreciar que el Panel HEA, cuándo se llega a la resistencia límite, el nudo va cediendo hasta que se alcanza el punto de rotura. En cambio,  con los sistemas de conexión mediante grapas, la unión falla repentinamente cuando se excede la resistencia límite. Esto produce un desarmado inmediato de la configuración original del panel.

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