To provide an impervious structure excellent in reliability of water leakage sensing of an impervious layer and a leakage sensing method excellent in reliability of leakage sensing which senses water leakage of the impervious structure.
An impervious structure is provided with an impervious layer having insulation properties, an upper part electrode installed at the inside of the impervious layer and used for leakage sensing of the impervious layer, and a lower part electrode installed outside of the impervious layer and used for leakage sensing of the impervious layer. The lower part electrode possesses a first conductive layer installed over the whole area of the outer surface of the impervious layer and a second conductive layer connected to the first conductive layer and installed at only a part of the outer surface of the impervious layer.
COPYRIGHT: (C)2005,JPO&NCIPI
Hiroaki Hiraoka
Tsutomu Tanaka
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