|発明の名称||METHOD FOR JOINTING BETWEEN SHEETS FOR PRE- WATERPROOFING OF UNDERGROUND STRUCTURE|
PROBLEM TO BE SOLVED: To provide a method for jointing between sheets for pre-waterproofing of an underground structure, which can be applied to natural ground and a wall, having great unevenness, even in a case of the waterproof sheet which is relatively small in elongation thereof and excellent in resistance to damage caused by a protrusion.
SOLUTION: This method, wherein the waterproof sheets 1 are joined together in such a manner that a waterproof material 2 is applied and infilled between the waterproof sheets 1, satisfies the following conditions: an overlap width of the waterproof sheet 1 is in a range of 5-40 cm; strength of an overlapped part between the waterproof sheets 1, which is coated and filled with the waterproof material 2, is in a range of 5-70% of strength of a waterproof sheet body; and a flow starting temperature of the waterproof material 2 is 30°C or less.
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