| 摘要 |
PROBLEM TO BE SOLVED: To provide a waterproof sheet and a construction method thereof, properly constructible along the circumferential direction of a curve place of a tunnel, particularly in a construction site of a back face smooth type tunnel lining method.SOLUTION: The present invention is a waterproof sheet 10 including nonwoven fabric 1 and an impervious sheet 2 arranged on one surface of the nonwoven fabric 1, and relates to the waterproof sheet in which the nonwoven fabric 1 and the impervious sheet 2 are mutually separate in both side edge parts of the waterproof sheet 10, and the nonwoven fabric 1 and the impervious sheet 2 are bonded by surface adhesion 3 and point adhesion 4 in its other part, and a point adhesion part 23 exists in a part closely adjacent to one or both side edge parts of the waterproof sheet 10.SELECTED DRAWING: Figure 1 |
