CUTOFF DEVICE FOR QUADRANGLE INTERCEPTING SEWER AND CUTOFF METHOD USING THAT

摘要

The present invention, a plurality of pillar members constructed to be upright in the sewer pipe; A base block mounted on a sewage pipe so as to be supported by the plurality of pillar members; A plurality of expansion blocks that are continuous in both directions of the base block and are seated to extend to both sides of the sewage pipe; A plurality of first stacked blocks stacked on an upper surface of the base block and extending to an upper portion of the sewage pipe; A plurality of second stacked blocks stacked on an upper surface of the expansion block, extending to an upper portion of the sewage pipe, and connected in both directions of the first stacked block; A connection portion engaging the base block and the column member so that the base block is supported by the column member; And a floatation prevention unit preventing the base block, the expansion block, the first laminated block, or the second laminated block from being floated by the sewage passing through the sewage pipe.