复杂环境下2座冷却塔控制爆破拆除

Controlled Blasting Demolition of Two Cooling Towers under Complicated Environment

采用定向倾倒控制爆破技术成功地拆除了复杂环境下2座高度分别为75 m、底部直径为62.63 m的冷却塔。针对冷却塔结构的特点,周围环境及安全要求,在冷却塔倾倒方向的正面塔体上开了9个减震窗口,仅对冷却塔人字支柱进行爆破,实现冷却塔壁体轻着落,并采取了封闭式防护和开挖减振沟及铺设缓冲垫层等安全防护措施。结合冷却塔爆破自身垮落原因,采取两冷却塔相向倒塌。此外,利用实测数据对触地振动进行了分析,验证了控振措施减振效果明显,实测振速值小于理论计算振速。

Two cooling towers with 75 meters in height and 62.84 meters in diameter in the complicated circumstances were dem- olished by directional blasting. According to the structural features, the surrounding environment and safety requirements of the cooling tower, nine shock absorption windows were opened on the front tower in the dumped direction of cooling tower, only the pillar of the cooling tower was blasted so that the wall of the cooling tower landing lightly, and the blasting take the Security measures such as duplex burst gap that pre-open a dormer and offload tank. Combined with the collapsed reasons of bursting of the cooling tower, take the method of two cooling towers collapsed oppositely. In addition, the measured data are analyzed for the vibration, which verifies that the vibration damping effects are significantly, the measured vibration value is less than the theoretical calculated value.