SETT OCH ANORDNING FOR ATT ASTADKOMMA EN SANDBRUNN I MJUK MARK

摘要

A sand drain comprising a tubular protector 5 to 25 cm in diameter prepared by weaving monofilaments in the lattice form to provide a mesh area of 2.0 to 3.0 mm2 and the sand filled into the protector to form a sand pillar, which, after constructed in soft ground, can be rendered flexible so as to match any displacement of strata of the soft ground, thereby preventing breakage of the sand pillar from breakage.