WATER CUT-OFF DEVICE FOR PASSAGE USING WATERPROOF SHEET

PROBLEM TO BE SOLVED: To provide a water cut-off device for passage using a waterproof sheet capable of cutting off water of a flood and others with a higher water level.SOLUTION: A waterproof sheet storage groove is formed on a passage floor surface and a lid for passage is installed in the upper surface opening part of the groove to be attachable/detachable. The lower edge of the waterproof sheet ranging over the width of the passage is supported in the groove in a water cut-off state, and the upper edges of the waterproof sheet pulled up from the inside of the groove are locked to both end posts so that the waterproof sheet can close the passage. Pressing columns are crimped to each of both end posts so that both edges of the waterproof sheet are held between both end posts and the pressing columns in a water cut-off state, and a horizontal reinforcement bar (11) crossing both end posts is laterally installed and fixed between both end posts in the intermediate position of the upper and lower range of both end posts, and the rear surface side of the waterproof sheet can be supported by the horizontal reinforcement bar (11).