blocking apparatus for hole of cofferdam

摘要

This design not only makes it possible to increase the efficiency of cutting off the open hole of the copper dam by making the opening hole of the copper dam easy to be robust when performing the airtightness test of the copper dam, And to an open-hole blocking device of a coffer dam. According to the present invention, A plate member on both sides of the center, the plate member having front and rear through holes; A penetrating member capable of flowing back and forth in the through hole of the plate member; A connecting member extending from a rear end of each of the penetrating members; And a coupling member coupled to each of the coupling members.