Abstract: When framed water tower is demolished,it is prone to recoil,and the flying stone is difficult to control.Taking the blasting demolition of a water tower with four columns frame structure as an example,it is only 4 m away from the kindergarten building,and it is located on the hillside,the length and width of the collapse are limited.Through the reasonable design of the extension time of front and rear columns,and the last load-bearing column is increased to 3;strengthening protection by combining cover protection method,near-body protection and protective protection;excavating a certain range of pits at the landing of the tank in the collapsed area.Through careful design,fine construction and strengthening protection,the water tower collapsed accurately after the blasting.All of the blasting hazard effects are effectively controlled,and there is no recoil, which can provide reliable reference for the similar engineerings.

Key words: Demolition blasting, Water tower, Directional blasting, Protection method