复杂环境下210 m烟囱定向爆破拆除  

Directional Blasting Demolition of 210 m Chimney under Complex Conditions

作　　者：程楠 CHENG Nan(China Railway 23RD Bureau Group CO.,LTD,Chengdu 610072,China)

机构地区：[1]中铁二十三局集团有限公司,成都610072

出　　处：《爆破》2021年第1期100-104,158,共6页Blasting

摘　　要：由于周边环境复杂、倒塌空间有限,厂区内210 m高烟囱爆破拆除施工必须保证定向爆破的精准度与安全性。根据理论计算与工程经验选取正梯形爆破切口、切口高度为4.5 m,切口圆心角为216°,烟囱外壁单耗为2.3 kg/m 3,内村单耗为1.45 g/m 3。通过优化开凿工艺、爆破参数以及起爆网路等控制措施控制爆破次生灾害;采用混合材料悬挂式覆盖防护、减震堤等安全措施控制爆破负面效应。最终爆破取得了良好效果,周边建(构)筑物在爆破过程中没有受到损伤,监测的振动峰值为0.27 cm/s。Due to the complex surrounding environment and limited collapse space for the demolition of a 210-meter-high chimney in a plant area,the accuracy and safety of the directional blasting must be ensured.According to theoretical calculation and engineering experience,a regular trapezoidal blasting incision was selected.The incision height was 4.5 m,the incision center angle was 216,the unit explosive consumption of the outer wall of the chimney was 2.3 kg/m 3,and the unit explosive consumption of the inner wall was 1.45 g/m 3.Measures by optimizing excavation technology,blasting parameters,and the blasting network were used to control secondary blasting hazards.The negative effects of blasting were controlled by adopting safety measures such as mixed material suspension cover protection and damping dikes.Finally,the blasting achieved good results.The surrounding buildings(structures)were not damaged during the blasting process,and the monitored vibration peak was 0.27 cm/s.

关 键 词：钢筋混凝土烟囱 复杂环境 定向爆破 安全防护 

分 类 号：TU746.5[建筑科学—建筑技术科学]