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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CANTERA ZIORDIA
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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MUMBAI PUNE EXPRESSWAY - ROCKFALL MITIGATION WORKS AT GHAT SECTION
India
Mumbai-Pune expressway is India’s first six-lane concrete expressway in Maharashtra connecting the financial capital of India (Mumbai) with state cultural capital (Pune). Built along the Sahyadri mountain ranges, through passes and tunnels, it is recognised as one of the most dangerous expressways prone to a series of rockfall and landslides, especially near tunnel portals causing a heavy damage to infrastructure, traffic disruptions and causalities specially during monsoon season. Challenges faced: 1. Has to be done as emergency protection work. 2. Fast execution was required because of the heavy traffic road. 3. Bigger threats of rockfall during installation.
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PASSAGEM INFERIOR DA RODOVIA BR-101 EM ESCADA
Brazil
A viaduct project was carried out on BR-101, in the municipality of Escada-PE, in the direction from Recife to Maceió, to create a turnaround point. During the construction of the project, the road's profile needed to be changed, raising its levels through the construction of embankments. However, the lateral projection of the embankment would intersect with the turnaround road if the slope was not made vertical with an appropriate retaining structure.
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