noun
gabion; stone-filled cage
A cylindrical or box-shaped wire mesh container filled with stones, used in civil engineering and erosion control. Often compared to 蛇籠 (じゃかご), a similar gabion structure.
See also: 蛇籠 (じゃかご)
河川の護岸工事でふとんかごが使われた。
Gabions were used in the riverbank protection work.
ふとんかごは蛇籠よりも平たい形状をしていることが多い。
Futonkago often have a flatter shape compared to jakago.
蛇籠 is a similar gabion structure, but typically cylindrical and used in river training. ふとんかご is often flatter and box-shaped.
Compound of 布団 (futon, 'futon mattress') and かご (kago, 'basket' or 'cage'), likely from the resemblance of the flat, mattress-like shape of the gabion to a futon.