大型冷却塔控制爆破技术及危害控制措施  

Controlled blasting technology and damaged control measures of the large cooling tower

作　　者：吕小师[1] 罗运军[2] 

机构地区：[1]河南理工大学土木工程学院,河南焦作454000 [2]河南理工大学基建处,河南焦作454000

出　　处：《河南理工大学学报（自然科学版）》2012年第5期589-593,共5页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(51074064);河南省教育厅自然科学基金资助项目(2011A580003);河南理工大学博士基金资助项目(B2011-004)

摘　　要：在电厂正常发电的情况下,为保证近邻建筑安全使用和设备正常运行,以理论计算为基础,结合工程实际和试爆合理选取最佳爆破缺口参数,是控制冷却塔倒塌的关键.分区、分段微差爆破可降低倒塌空气冲击波的速度.预开减震窗破坏冷却塔的整体性,使冷却塔在倾倒过程中处于一种边倾倒、边着地、边破碎的软着陆状态,可有效地减小塔体倒塌产生的触地振动.在塔壁倒塌方向的背面预开泄气窗可降低倒塌空气冲击破坏程度.上述措施的成功应用为类似工程施工提供了借鉴.The power plant cooling tower demolition work is mostly carried in the case of electricity generation,thusly it is an important problem to ensure the safe use of surrounding buildings and equipment as well as the normal operation of equipment.The best blasting gap parameters are the key to control the collapse of the cooling tower,which depends on theoretical calculation,engineering practice and blasting tests.Millisecond subsection blasting can reduce the speed of the air shock wave in the collapse.Pre-opening damping skylight is one of the best ways to effectively reduce the vibration generated by touchdown becanse it can destroy the integrity of the tower and make the cooling tower collapse,in a soft landing state.Pre-opening leak skylights in the opposite direction of the collapse can reduce the impact of the damage of the air shock wave in the collapse.The successful application of the above measures provides a reference and a guidance for similar projects.

关 键 词：控制爆破 大型冷却塔 爆破缺口 触地震动 空气冲击波 

分 类 号：TU332[建筑科学—结构工程]