METHOD AND APPARATUS FOR PLACEMENT OF A SUBTERRANEAN CURTAIN BELOW THE FACE OF THE EARTH

摘要

Apparatus and method for placement of a subterranean curtain below the face of the earth.

主权项

1. A method for to reinforce a dike by placement of a subterranean water-permeable curtain below the face of the earth, comprising the steps of:
selecting an area with soil in which the subterranean curtain is to be placed; carving a slit at a predefined location in the soil; providing a movable casing in said slit; providing the movable casing with the curtain; dispatching the curtain from the movable casing into the slit; and closing said slit, and wherein carving the slit and providing the subterranean curtain in said slit is executed in an area with a predefined stratification of a sand layer and a clay layer on top of said sand layer, wherein: after dispatching the water-permeable curtain from the movable casing into the slit, introducing sand and clay is introduced in the slit on opposite sides of the water-permeable curtain so as to close said slit and restore the area's original stratification of sand and clay.