To provide an execution structure of a cut off construction not loosening the sheet of a slope face bringing no damage by the front edge of a rock laying even on the steep sloped face, abutting along the substrate sufficiently even when the bottom face settles down.

In an execution structure in which a civil engineering cut off sheet is laid on the surface of the substrate 1 having a sloped face 2 and the bottom face 3, a cut off sheet 6 for the sloped face in which a base cloth 4 is embedded in the cut off membrane 5 is laid on the sloped face 2. The cut off sheet 7 for the bottom face formed of only the cut off membrane 8 is laid on the bottom face 3. The base cloth 4 with the strength of 100-700 N/cm at 15-35% in elongation is used in the cut off sheet 6 for the sloped face.