CUVE DE TRAITEMENT D'EAUX DESTINEE A ETRE ENTERREE, COMPRENANT UNE PAROI EXTERNE PRESENTANT DES ELEMENTS EN SAILLIE

摘要

The tank (1) has an outer wall defining a treatment chamber and a filter material, where the outer wall is provided with a set of projections (4). Each of the set of projections is provided with a support surface (40) against which a planar back-filling material is capable of exerting a force directed towards a bottom of the tank. The projections are provided with a triangular cross-section. The support surface is allowed to overhang a lower surface (41). A slope of the support surface with regard to a horizontal line is of specific value.