WATERPROOF STRUCTURE OF VIBRATION ABSORBER FOR REDUCING AND ISOLATING BLAST VIBRATION IN DOWNTOWN AREA

摘要

blasting according to the invention to be inserted into the drilling hole formed in order to prevent the line from being transmitted to the outside blasting vibration resistant structure of the dustproof material is dustproof material which is inserted in the longitudinal direction in the line boring ball; Provided to at least wrap the bottom of the tarp completely dustproof; And the tarpaulin comprises at least one shrink band to press toward the outer surface of the dustproof material. The waterproof upper tarp provided to completely surround the upper end portion of dustproof; And an upper tarpaulin further shrink band to press the upper toward the outer surface of the dustproof material, or the tarpaulin is the lower is closed, to surround and cover the entire jimyeo dustproof material, and can be configured to be sealed by the top of the knot. Dustproof material of the outer surface and the drilling line of the ball between the inner peripheral surface pressure on the outer peripheral surface of the dustproof dustproof material is filled with a predetermined amount of the filler to prevent a rise by buoyancy.