A flexible debris-resisting barrier is a structure used to mitigate debris flows or to contain flow-entrained woods. These structures mainly consist of interconnected metallic components (cables, posts, shackles...). Flexible debris-resisting barriers are derived from rockfall barriers and were first proposed in the mid-1990s in the USA.
In torrents, flexible debris-resisting barriers constitute a sound alternative to check dams for containing debris flows.
The main components of flexible debris-resisting barriers are:
An interception structure, made up of a principal net with metallic cables, wires, or bars and additional layers, usually a finer mesh than the principal. A support structure made of metal posts, to support the interception structure. Connection components (also called brakes), which dissipate energy from the barrier into the ground or foundation.
These barriers are often installed in torrent beds to intercept and contain flow-entrained granular materials or woody debris. In their simplest form, flexible debris-resisting barriers only consist of an interception structure. When installed in larger channels, the barrier also includes a support structure.
See also
Debris flow Check dams Rockfall barrier
References