复杂环境下2座冷却塔控制爆破拆除
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摘要
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.
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.
引文
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[2]瞿家林,谢兴博,王希之,等.90m高冷却塔爆破拆除安全防护设计[J].爆破,2011,28(2):72-75.[2]QU Jia-lin,XIE Xing-bo,WANG Xi-zhi,et al.Securityprotection design of explosion demolition of 90 m coolingtower[J].Blasting,2011,28(2):72-75.(in Chinese)
[3]褚怀保,余永强,杨小林,等.钢筋混凝土冷却塔爆破拆除控振措施研究[J].河南理工大学学报,2010,29(1):85-87.[3]CHU Huai-bao,YU Yong-qiang,YANG Xiao-lin,et al.Study on control measures of reinforced concrete coolingtower blasting vibration[J].Journal of Henan PolytechnicUniversity,2010,29(1):85-87.(in Chinese)
[4]王铁,刘立雷.冷却塔定向爆破拆除及爆破效果有限元数值模拟[J].爆破,2011,28(1):67-70.[4]WANG Tie,LIU Li-lei.Directional explosive demolition ofcooling tower and its numerical simulation process[J].Blasting,2011,28(1):67-70.(in Chinese)
[5]夏卫国,武双章,唐勇.2座110m高双曲线冷却塔爆破拆除[J].爆破,2011,28(2):68-71.[5]XIA Wei-guo,WU Shuang-zhang,TANG Yong.Explosivedemolition of two 110 m hyperbolic cooling towers[J].Blasting,2011,28(2):68-71.(in Chinese)
[6]沈立晋,汪旭光,于亚伦,等.100m高烟囱拆除爆破冲击振动测试与分析[J].工程爆破,2002,8(4):16-19.[6]SHEN Li-jin,WANG Xu-guang,YU Ya-lun,et al.Monito-ring and analysis of impact vibration caused by tippling ofa chimney with height of 100 meters[J].EngineeringBlasting,2002,8(4):16-19.(in Chinese)
[7]吕淑然,杨军,刘国振.高大建筑物定向爆破地震振动效应监测与控制研究[J].爆破,2003,20(3):71-74.[7]LU Shu-ran,YANG Jun,LIU Guo-zhen.Measurement andcontrol of the seism vibration effect of the edifice direc-tional demolition[J].Blasting,2003,20(3):71-74.(inChinese)
[8]周家汉.爆破拆除塌落振动速度计算公式的讨论[J].工程爆破,2009,15(1):1-4,40.[8]ZHOU Jia-han.Discussion on calculation formula of col-lapsing vibration velocity caused by blasting demolition[J].Engineering Blasting,2009,15(1):1-4,40.(inChinese)
[9]汪旭光,于亚伦,刘殿中.爆破安全规程实用手册[M].北京:人民交通出版社,2004.
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