Panels
High-stiffness mesh for rockfall protection
Maccaferri HEA Panels (High Energy Absorption) are the stiffest products within our Mac.RO(TM) Systems mesh range, offering extreme strength at low strain. Stiffness is more important than tensile strength of meshes as it affects the deflection of the system under load. The panels are woven from a single continuous length of high tensile strength steel wire rope, joined at each crossing point with the patented HEA 'double knot' connection.
Unlike single twist spiral rope nets, the construction of HEA Panels provides exceptional stress/strain performance with the lowest possible deformation. HEA Panels are used in secured drapery applications where a low deflection and high strength system is required. Due to the multi-axial performance of the panel, loads are transferred effectively to the anchors on the slope face regardless of the anchor layout.
HEA panels made from polymer coated cables are also available for demanding exposure conditions. The patented knot connection is made by two bindings, each one obtained by looping a pair of steel 3.00 mm wires coated with Galmac, a Zinc-Aluminium (5%) alloy. The two bindings tightly envelop the ropes crossing each other. The panel is made of square meshes manufactured with one rope, secured by a pressed aluminium ferrule, according to EN 13411-3.
Success Stories
Built, not just drawn
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SECURING THE AREA OF ZIORDIA QUARRY
The Ziordia quarry has an orography formed by limestone rock, with steep slopes as a result of quarrying, and potentially unstable large blocks. The company CRS Ingeniería contacted Bianchini Ingeniero to analyse the situation and possible solutions, and subsequently the company Inaccés Geotècnica Vertical also intervened. One of the main risks was the blocks that could fall from a 40-metre-high, 15-metre-wide mochón, located on one of the quarry's usual passageways. This represented a potential risk for the installations and the workers themselves. Therefore, a series of actions were carried out to stabilise these blocks and protect the area.
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SECURING THE FRANCE - ITALY ALPINE CONNECTION
The Rochaille passage, on the RD 900 road, which connects France and Italy via the Ubaye valley in the Alpes-de-Haute-Provence, is one of the most sensitive road routes in terms of safety. It is a major link between France and Italy via the Col de Larche (Maddalena Pass). The danger of rockfalls that could cut off the road is well established and, a few years ago, has already caused the complete isolation of certain municipalities as well as the closure of this access route to Italy. Beyond the safety of people and property, this situation has a significant economic impact on access to ski resorts, on the organisation of major media events, and on truck traffic towards Italy. Securing this road had become essential.
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Il tratto ligure della Ciclovia Tirrenica "Riviera dei Fiori" collega Imperia e Diano Marina, offrendo un percorso di elevato valore paesaggistico grazie al costante affaccio sul mare. Il Lotto Prioritario Ligure – Stralcio 3 “Incompiuta” rientra nella pianificazione del Sistema Nazionale delle Ciclovie Turistiche e della Rete Ciclabile Ligure, con l’obiettivo di promuovere una mobilità sostenibile e valorizzare il patrimonio storico, culturale e ambientale. L'intervento, finanziato con oltre 11mln di euro, è stato realizzato dalla Regione Liguria e dai Comuni di Imperia e Diano Marina. L'area di intervento, posta ad una quota di circa 120m s. l. m. , ricade in un tratto di costa caratterizzato da versanti molto acclivi e diffusa instabilità. L'assetto giaciturale, spesso sfavorevole, dei sistemi di fratturazione, il grado di fratturazione dell'ammasso roccioso e l'azione degli agenti atmosferici hanno favorito nel tempo fenomeni di dissesto, prevalentemente crolli, che interessano le coperture detritiche e le pareti rocciose. Si è, dunque, reso necessario mettere in sicurezza i versanti a monte del tracciato ciclopedonale.
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