复杂环境下90 m高冷却塔的爆破拆除

根据冷却塔结构特点及其周边复杂环境情况,充分利用原开设缺口,合理布置减荷槽和定向窗简化爆破切口。针对钻爆参数及爆破网路进行优化设计,采取定向爆破倒塌方案。倒塌形式实质上是塔体扭曲变形失稳,具有倾倒趋势的坍塌或原地坐塌,使冷却塔在爆破过程中因自重作用而扭曲变形并触地解体,有效减少二次解体的工作量。针对电厂的特殊情况,爆破采用非电导爆管起爆系统起爆,最终成功实施了冷却塔的定向爆破拆除;通过稳定性验算确保预拆除安全;通过有效的防护体系和安全措施确保将爆破振动、个别飞散物和空气冲击波等爆破危害效应控制在安全允许范围内。

Explosive Demolition of 90 m-high Cooling Tower Under Complex Environment

According to the structural characteristics of cooling tower and the surrounding complicated situa-tions,the blasting cut directional window was simplified by making full use of the original open gap and reasonably decorate relieving slot. The drilling and blasting parameters and blasting network were optimized. The directional blasting scheme was adopted,in which the collapse of cooling tower was caused by the blasting distortion in situ due to gravity.This method effectively reduced the secondary detonating workload.According to the special condition of power plant,blasting was initiated by non electric detonating system.Ultimately,the directional blasting demolition of the cooling tower was successfully fulfilled and the dismantle safety was obtained and security measures to ensure the blasting vibration,individual flying objects and the harmful effects of such blasting air shock wave in the range of al-lowable safety control.