The defence barrier, also known as a defense bastion, defense wall, or sand cage, is a prefabricated multi-cell barrier system comprised of galvanized steel mesh panels lined with non-woven geotextile fabric. The modular design allows units to be easily joined together using included pins, extending the barrier length efficiently.

Simple to install using minimal manpower and standard equipment, the defence barrier is filled with sand or stone once in place. Upon filling, it forms a sturdy fortification similar to a defensive wall or bunker. The interlocking gabion boxes provide protection through an armored exterior while permitting the controlled placement of internal ballast.

Widely adopted for coastal and riverside fortification projects as well as flood control operations, the defence barrier utilizes its tough yet versatile structure to contain and redirect water flows. As temporary or permanent coastal defenses, the barriers withstand wave impacts and storm surges far better than alternate techniques. Their modular construction allows rapid deployment and custom sizing to any shoreline scenario.

Overall, the defence barrier presents a pre-engineered, labor-efficient solution for the creation of protective earthwork walls and levees through a simply assembled gabion system.

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