45m钢筋混凝土烟囱同向折叠爆破拆除  

Demolition of 45m reinforced concrete chimney with co-rotating folded blasting

作　　者：邹宗山[1,2] 杨军[1,2] 李福强[1] 佐建君 杨忠豪 

机构地区：[1]北京理工大学机电学院爆炸科学与技术国家重点实验室,北京100081 [2]北京理工北阳爆破工程技术有限责任公司,北京100081

出　　处：《工程爆破》2016年第6期45-47,共3页Engineering Blasting

摘　　要：为了安全实施45m钢筋混凝土烟囱在距33m处高压线和倒塌空间受限环境中的爆破拆除,采取双切口同向折叠爆破拆除技术,最终确定上、下切口延时时间5s,超长的延时时间保证了烟囱上段筒体倾倒加速后下段筒体才开始倾倒,避免烟囱上段筒体倒塌发生前倾现象,缩短了烟囱的倒塌长度,使其在32m以内,确保了高压线的安全。该工程对于烟囱双切口同向折叠及延时时间的选择具有一定的借鉴意义。The distance was only 33 m between the 45 m high reinforced concrete chimney and the high voltage line. The col- lapse space was limited for the chimney collapsing. In order to ensure the safety of the high voltage lines, the co-rotating folded blasting demolition technique was used. Moreover, the delay interval was 5 s between the upper and lower blasting notch initiated. Overlong delay interval ensured the lower chimney start to collapsing after the upper chimney dumping acceleration, avoided the forward rush of the upper chimney section, and shortened the collapse length of the chimney within 32 m. The project had a certain significance to select the delay interval with the co-rotating folded blasting demolition.

关 键 词：钢筋混凝土 烟囱 折叠爆破 爆破参数 延时时间 

分 类 号：TD235.3[矿业工程—矿井建设]