Method for making an underground watertight screen and the screen so produced

摘要

The invention relates to an underground watertight screen extending in a horizontal general direction, comprising at least one stratum consisting of a plurality of solid unitary elements (3) which intersect one another, formed from a mortar or puddled earth (8) or from a hardened slurry, the said unitary elements (3) having the shape of a cone with substantially vertical axis and whose vertex angle theta lies between 60 and 170 DEG inclusive. Application in the field of civil engineering works, for example for producing footings.