Geotextile structure for filtration

摘要

A geotextile structure for filtering liquid from soil includes a lower layer of geotextile material for contacting soil for filtration thereof. The lower layer presents in its thickness a number of constrictions n included between 15 and 40, and is made of synthetic filaments or fibers presenting a count D wherein D is measured in units of decitex. An upper layer of geotextile material provides mechanical protection of the lower layer. The upper layer presents in its thickness constrictions more open than the constrictions of the lower layer to avoid clogging of the lower layer. The upper layer is made of synthetic filaments or fibers presenting a count at least equal to 2D. The upper and lower layers are bonded to each other.