Water hammer wave protection method for blasting demolition of seepage-proofing pile of reinforced concrete water-retaining cofferdam

Abstract

The invention discloses a water hammer wave protection method for blasting demolition of a seepage-proofing pile of a reinforced concrete water-retaining cofferdam. The water hammer wave protection method comprises the following steps that S1, blasthole parameters needed for blasting, unit consumption of explosives needed for blasting and the plugging length of a plugging object needed for blasting are designed; S2, blastholes are drilled in the seepage-proofing pile according to the blasthole parameters, and explosive charging is prepared; S3, the blasting blastholes are charged with the explosives according to the design, and meanwhile a detonating cord and a detonating tube detonator are mounted on the corresponding positions; S4, a wave baffle is mounted in front of a water-taking gate; and S5, a bubble curtain is mounted in front of the water-taking gate, after mounting, water hammer wave protection arrangement for blasting demolition of the seepage-proofing pile of the reinforcedconcrete water-retaining cofferdam is completed, and thus blasting demolition operation can be conducted. The water hammer wave protection method is more scientific and more reasonable in design, lower in cost and easy to operate, through the double effects of the bubble curtain and the wave baffle, water hammer waves generated by blasting are attenuated effectively, and surrounding buildings andfacilities are protected.

Description

technical field [0001] The invention belongs to the technical field of blasting engineering, and relates to a safety protection method for underwater anti-seepage pile blasting, in particular to a water shock wave protection method for blasting demolition of anti-seepage piles in retaining cofferdams. Background technique [0002] Reinforced concrete water retaining cofferdams are often seen in the construction of water conservancy and hydropower projects. However, with the development of water conservancy and hydropower projects, the original reinforced concrete water retaining cofferdams need to be removed. The project of the weir is large, and manual demolition is difficult and time-consuming. Usually, blasting technology is used to demolish the reinforced concrete water retaining cofferdam. Safe operation methods are the most important during the blasting demolition process. Due to the huge blasting force, the shock wave generated by the explosion of the explosive rushes...

AI Technical Summary

Problems solved by technology

Due to the huge blasting force, the shock wave generated by the explosion of the explosive rushes out of the filling, rushes into the water, and converts into a water shock wave in the water, and the explosive will also generate a large number of seismic waves when it explodes, and the seismic wave will be refracted at the bottom interface The water shock wave formed in the water, and then the water shock wave transformed by the blasting force and the water shock wave formed by the seismic wave are superimposed on each other, increasing the power of the water shock wave, resulting in a greater force of the water shock wave generated during the blasting, which endangers the building. Structures and Equipment

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