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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PRESA FRANCISCO ABELLÁN
Spain
The Francisco Abellán reservoir is located near the town of Lopera, in the center of the province of Granada. It is fed mainly by the tributary of the river Fardes, which in turn is fed by the river Guadiana Menor and covers an area of 1847. 40 km2. The reservoir contains Miocene sedimentary materials such as sandstones, marlstones and calcarenites. In the extreme north-east, there is an alternation of these three materials and two problems: The first is in the upper sandstone bench due to the presence of unstable blocks, some of them of large size. The second problem is in the lower bank, where unstable blocks and roofs are also observed as a result of differential erosion. On the other hand, on the northwest slope (NW) there is access to the monitoring station which is unprotected against falling rocks.
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PROTEÇÃO COSTEIRA COM GABIÕES
Brazil
The sea waves were eroding the seafront in front of the condominium, where the development's leisure area and access ramp are located. These erosions have caused problems getting around and accessing the property.
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