[提要]  根据力学原理，计算了钢筋混凝土筒形结构定向倾倒拆除的切口高度和切口角度，分析了筒形结构的定向倾倒过程。还给出了一个高径比为2.26、拆除难度极大的水塔定向爆破拆除的工程实例。
[关键词]  筒形结构  定向倾倒  切口高度  切口角

Based on mechanics principles, this paper calculates the cutting height and cutting angle of tubular building directional demolition. The toppling process of tubular building demolition is analyzed. A successful demolition of an tubular water tower is introduced.
Keywords:  tubular building; directional toppling; cutting height; cutting angle