Water shutoff method for existing pipes and water shutoff structure for existing pipes

摘要

PROBLEM TO BE SOLVED: To easily cut off infiltrated water from an existing pipe to a manhole.SOLUTION: A water cutoff method of an existing pipe, where an existing pipe 31 communicates with a manhole 32, includes a regeneration pipe arrangement step of arranging a regeneration pipe 40 on an inner surface of the existing pipe 31, and projecting a pipe end part 42 of the regeneration pipe 40 from the inside of the existing pipe 31 to the inside of the manhole 32; an elastic body arrangement step of arranging an annular elastic body 11 on an outer periphery of the pipe end part 42; and a holding step of arranging an annular pressing member 12 on the outer periphery of the pipe end part 42 and holding the elastic body 11 between a manhole wall 30 and the pressing member 12 to elastically deform the elastic body, and pressure-welding the elastic body 11 to outer peripheral surfaces of the manhole wall 30 and the regeneration pipe 40.SELECTED DRAWING: Figure 2