Civil engineering description

Civil engineering

gabions,rock mattresses,gabion baskets,

Material:	galvanized wire
Properties:	woven wire mesh
Application:	stabilize shorelines, stream banks or slopes against&160;erosion

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The most common civil engineering use of gabions,it is used to stabilize shorelines, stream banks or slopes against erosion. Other uses include retaining walls,noise barriers, temporary flood walls,silt filtration from runoff, for small or temporary/permanent dams, river training, or channel lining.They may be used to direct the force of a flow of flood water around a vulnerable structure.

Gabions are also used as fish screens on small streams. Gabion stepped weirs are commonly used for river training and flood control; the stepped design enhances the rate of energy dissipation in the channel, and it is particularly well suited to the construction of gabion stepped weirs.

A gabion wall is a retaining wall made of stacked stone-filled gabions tied together with wire. Gabion walls are usually battered (angled back towards the slope), or stepped back with the slope, rather than stacked vertically.

Gabion baskets have some advantages over loose riprap because of their modularity and ability to be stacked in various shapes. Gabions have advantages over more rigid structures, because they can conform to subsidence, dissipate energy from flowing water and resist being washed away, and they drain freely. Their strength and effectiveness may increase with time in some cases, as silt and vegetation fill the interstitial voids and reinforce the structure. They are sometimes used to prevent falling stones from a cut or cliff endangering traffic on a thoroughfare.

The life expectancy of gabions depends on the lifespan of the wire, not on the contents of the basket. The structure will fail when the wire fails. Galvanized steel wire is most common, but PVC-coated and stainless steel wire are also used. PVC-coated galvanized gabions have been estimated to survive for 60 years.Some gabion manufacturers guarantee a structural consistency of 50 years.