| 摘要 |
PROBLEM TO BE SOLVED: To provide a self-restoration type waterproof sheet for use in the construction of a tunnel etc., which is used for automatically and stably repairing a damaged portion of an impermeable sheet surface of the waterproof sheet, particularly, in the construction of the tunnel, and a repairing method for the waterproof sheet. SOLUTION: In this waterproof sheet having at least the impermeable sheet, the impermeable sheet comprises at least three layers, that is, front-side and backside layers as thermoplastic resin layers which contains a thermoplastic resin, and an intermediate layer as a low-melting substance layer which contains a low-melting substance is to be softened or melted by the hydration reaction heat of cement. COPYRIGHT: (C)2008,JPO&INPIT
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