HEA钢丝绳网
用于落石防护的高刚度网
HEA钢丝绳网是整个马克菲尔落石防护体系中刚度最大的柔性金属网,具有很高的强度与非常小的应变。刚度是影响落石防护挂网类系统整体受力性能的最主要因素,比金属网强度更加重要。HEA钢丝绳网由一整根连续的高强度钢丝绳编织而成,网中钢丝绳的交叉节点采用特殊的“双股钢丝缠绕”方式固定。
与采用钢丝束通过单绞合形式编织而成的柔性网不同,HEA钢丝网能够为防护系统提供优越的应力/应变性能,使整个防护系统的变形降至最低。HEA网通常用于对强度和变形控制均有很高要求的主动防护系统中。得益于网面的多轴特点,无论锚杆在坡面上如何布置,HEA钢丝绳网都可以将网面受力有效地传递到锚杆上。
HEA网中钢丝绳的交叉结点采用“双股钢丝缠绕” 专利技术固定。节点中每个方向的钢丝绳均采用一对直径为3.0mm的镀高尔凡(Al5%-Zn合金+稀土元素)防腐处理的钢丝紧密缠绕而成。单张网片采用单根钢丝绳制成,钢丝绳首尾相连并用铝套管固定。完全符合欧洲标准EN13411-3的要求。
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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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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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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