APPLYING OF WATERPROOF SHEET FOR TUNNEL CONSTRUCTION

摘要

PURPOSE:To prevent a waterproof sheet from sagging to reduce its thickness or being broken because of its self-weight by melting only a necessary and least range of the thermo-welding waterproof sheet, which is used for warterproofing in tunnel construction, and by properly heating the waterproof sheet to ensure good welding work. CONSTITUTION:To thermally weld a themo-welding type waterproof sheet 4 to an object 1 to which the thermo-welding type waterproof sheet 4 is to be attached and which is situated on a tunnel primary lining surface 3. The waterproof sheet 4 is placed over the object 1 to be attached, while a heating wire is interposed there between, and the heating wire 5 is electrified, so that the waterproof sheet 4 is thermally welded to the object to which the sheet 4 is to be attached.