薄壁型钢混结构烟囱控制爆破拆除  

Controlled Blasting Demolition of Thin-walled Steel-concrete Structure Chimney

作　　者：谢亮波[1,2] 王铭 张西良 仪海豹[1,3] 顾红建 江东平[1,2] XIE Liang-bo;WANG Ming;ZHANG Xi-liang;YI Hai-bao;GU Hong-jian;JIANG Dong-ping(Sinosteel Maanshan Institute of Mining Research Co.,Ltd.,Manshan 243000,China;Maanshan Institute of Mining Research Blasting Engineering Co.,Ltd.,Manshan 243000,China;State Key Laboratory of Safety and Health for Metal Mines,Manshan 243000,China)

机构地区：[1]中钢集团马鞍山矿山研究院有限公司,马鞍山243000 [2]马鞍山矿山研究院爆破工程有限责任公司,马鞍山243000 [3]金属矿山安全与健康国家重点实验室,马鞍山243000

出　　处：《爆破》2020年第2期75-79,共5页Blasting

基　　金：国家重点研发计划资助项目(项目编号:2017YFC0602902);安徽省重点研究和开发计划资助项目(项目编号:201904a07020038)。

摘　　要：为消除石溪野水泥厂废弃薄壁钢混结构烟囱的安全隐患,在分析烟囱周边环境及拆除技术难点的基础上,采用与高压线平行的定向倒塌方案进行控制爆破拆除。设计爆破切口高度2.25 m,切口角度225°,三角形定向窗高度1 m,筒壁和烟道处炸药单耗分别取3.8 kg/m 3和2.3 kg/m 3;倒塌方向上设置两道高度1 m的土挡墙以减弱塌落振动,采用铁丝网和多层密目网防护措施以控制爆破飞石。通过精细的爆破设计和组织施工,成功实现了烟囱的定向爆破拆除,爆破振动和飞石控制在安全允许范围内。In order to eliminate the safety hazard of the abandoned thin-walled steel-concrete chimney in Shixiye Cement Plant,the controlled blasting demolition was carried out by considering the directional collapse scheme which parallel to the high-voltage line based on analyzing the surrounding environment of the chimney and the difficulties in demolition.The height of blasting cut was 2.25 m,the angle of the cut was 225°,and the height of the triangular oriented window was 1 m.The powder factor at the wall and the flue were 3.8 kg/m 3 and 2.3 kg/m 3 respectively.Two soil retaining walls with a height of 1 m were set in the collapse direction to reduce the collapse vibration.Barbed wire and multi-layer mesh were used to control the blasting flying rock.Through the fine blasting design and construction organization,the directional blasting demolition of the chimney was successfully realized,and the blasting vibration and flying rock were controlled within the safe allowable range.

关 键 词：薄壁钢混烟囱 拆除爆破 倒塌方案 危害控制 爆破效果 

分 类 号：TU746.5[建筑科学—建筑技术科学]