摘要
120m钢筋混凝土烟囱组拆除是国内高耸构筑物中非常典型的拆除案例。本组烟囱由于环境复杂、整体性好、布筋较密，其爆破切口高度H和切口圆心角“分别取H=2．4m，α=218°～220°。爆破切口形状采用正梯形，将排烟道处理后形成的孔洞作为定向孔，定位孔采用复合角形式，底部夹角分别为28°和56°。爆破参数科学合理，烟囱组倒塌方向和振动控制均非常理想。
It is a typical case that demolating 120 meters chimneys in China.With the complex environment,integral construction and dense rebars,the blasting cut height was designed as H=2.4mand the central angle of blasting cutα=218°~220°.The shape of blasting cut is regular trapezoid.The flue is used as directional hole after being discharged.The compound angle is adopted in location hole and the bottom angles are 28°and 56°.The parameters designed for the blasting was scientific and reasonable,collapse direction and vibration control of the chimneys were ideal.
出处
《工程爆破》
2015年第1期29-32,共4页
Engineering Blasting
关键词
钢筋混凝土
整体式烟囱
爆破设计
Reinforced concrete
Integral chimneys
Blasting design
