To manufacture easily by sticking and forming an impervious film layer on the surface of a rough-textured foundation cloth having chemical resistance, and attaching a waterproofing agent-carrying rough-textured cloth having chemical resistance to the outer surface of the impervious film layer.
An impervious film layer 3 is formed on the outer surface 2 of a rough-textured foundation cloth 1 having chemical resistance, such as a nonwoven cloth of synthetic fibers or rough-textured, knitted or woven cloth by sticking a synthetic resin film or a synthetic resin sheet the outer surface 2 of the rough-textured foundation cloth 1. And a substrate material 7 for forming an impervious film is formed by attaching a waterproofing agent carrying rough texture cloth 5 having chemical resistance such as a nonwoven cloth of synthetic fibers to the outer surface 4 of theimperious film layer 3. The case of execution of layers, the substrate material 7 for forming the impervious layer is fixed to a surface for execution, such as the exterior wall of a culvert, the bottom of a regulating reservoir or the inside wall of a tunnel, with anchor pins, with the rear side of the foundation cloth 1 butted against the surface. If spring water that issues and gushes out to the surface, the spring water flows down naturally and is discharged without infiltrating the waterproofing agent carrying cloth 5. Thus the impervious layer can be manufactured easily and can discharge spring water.
OGAWA HARUKA
KAWACHI TAKESHI
HORI OSAO
YAMASHIRO IKUTAMI
IWASAKI TAKASHI
CHIBA KIYOSHI
J FEC KK
MITSUBOSHI IND