One-time excavation blasting construction technology for rock cofferdam of water intake pump station
In order to realize one-time blasting of the cofferdam of the water intake pumping station under complex blasting environment,based on the construction technology of removing the protective layer by horizontal pre-splitting blasting in the water conservancy and hydropower project,it is proposed to use pre-splitting blasting on the slope and bottom plate,and to use the radial decoupling and axial decoupling charging method in the hole to reduce the effect of blasting vibration by the main blasthole on the protective building.Horizontal micro-inclined blast holes are used to prevent the accumulation of blasting slag to the side of the gate.In view of the difficulty of blocking the horizontal water-contained blasthole,the cement anchoring agent is used as the blocking material to block the blasthole.The excellent performance of the cement anchoring agent ensures the blocking quality of the blasthole and solves the punching hazard of the horizontal water-contained blasthole.The method of combining active protection with passive protection is adopted to control the harmful effect of blasting within the allowable range of safety.The research results can provide a reference for the design and construction of similar projects.
cofferdam blastingpre-splitting blastinguncoupled chargingcement anchoring agentactive and passive protection
万方数据
维普
