90 m高楼房折叠控制爆破
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摘要
处于复杂环境中的一栋90 m高框架剪力墙结构楼房需爆破拆除,可供倒塌的场地逼仄、距国家二级保护文物最小距离只有17 m。对楼房采用了三个爆破缺口、自上而下顺序起爆、上中切口间时差1.3 s、中下切口间时差1.5 s、向南双向折叠控制爆破技术。用人工剪破碎和机械剪切等方法结合力学原理对剪力墙、电梯井等刚性承重体提进行预处理,尽可能在爆破前不影响建筑物稳定性的前提下消弱楼房的刚性。分析并结合楼房的建筑材料、结构和受力状态选择最符合的爆破参数,爆破中使用复式双闭合起爆网路,采用合理的减震、防尘和防飞石等防护措施。爆破效果良好,确保了临近的国家二级保护文物和周边建构筑物的安全。
The demolition blasting design and construction technology for a 90 m high building with frame-shear wall structure was performed in a complex environment.The collapsible site was narrow with minimum distance 17 m to national second-class protected cultural relics,and 3 blasting cuts were set from top to bottom of the building.The time difference between upper and middle cuts and middle and lower cuts was 1.3 second and 1.5 second,respectively.The bidirectional folding controlled blasting technology was carried out southward.The pretreatment and blasting parameters,priming circuit and safety protection measures of the project were given.Under the refined construction,good blasting effect was obtained,without damage to adjacent national second-class protected cultural relics and surrounding buildings.
The demolition blasting design and construction technology for a 90 m high building with frame-shear wall structure was performed in a complex environment.The collapsible site was narrow with minimum distance 17 m to national second-class protected cultural relics,and 3 blasting cuts were set from top to bottom of the building.The time difference between upper and middle cuts and middle and lower cuts was 1.3 second and 1.5 second,respectively.The bidirectional folding controlled blasting technology was carried out southward.The pretreatment and blasting parameters,priming circuit and safety protection measures of the project were given.Under the refined construction,good blasting effect was obtained,without damage to adjacent national second-class protected cultural relics and surrounding buildings.
引文
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[11] 汪旭光.爆破设计与施工[M].北京:冶金工业出版社,2011.
[12] 黄奇,张智宇,李祥龙,等.爆破振动对砌体结构建筑物的动力响应分析[J].矿治,2018,27(2):19-23.[12] HUANG Qi,ZHANG Zhi-yu,LI Xiang-lon,et al.Dynamic respomse analysis of blasting vibration on masonry building structures[J].Mining&Metallurgy,2016,33(3):81-87.(in Chinese)
[2] 贾永胜,谢先启,姚颖康,等.高层建筑物折叠爆破拆除关键技术参数探讨[J].爆破,2016,33(3):75-80.[2] JIA Yong-sheng,XIE Xian-qi,YAO Ying-kang,et al.Discussion on key technical parameters of folding blasting demolition of high-rise buildings[J].Blasting,2016,33(3):75-80.(in Chinese)
[3] 邢光武,李战军,傅建秋,等.同层位无时差双向折叠爆破新技术的应用[J].爆破,2009,26(3):54-57.[3] XING Guang-wu,LI Zhan-jun,FU Jian-qiu,et al.Research on high building demolish by blasting of bidiretional synchronization collapse on the same floor[J].Blasting.2009,26(3):54-57.(in Chinese)
[4] 刘世波,曲云龙,薛里,等.高层建筑物单向三折叠爆破拆除数值模拟[J].工程爆破,2017,23(3):77-80.[4] LIU Shi-bo,QU Yun-long,XUE Li,et al.Numerical simulation of high-rise buildings one-way tree fold blasting demolition[J].Engineering Blasting,2017,23(3):77-80.(in Chinese)
[5] 李小贝,蒙云琪,吴剑锋,等.基于Vague Sets-topsis 理论的爆破方案优选[J].爆破,2018,35(2):94-100.[5] LI Xiao-bei,MENG Yun-qi,WU Jian-feng,et al.Blasting scheme optimization based on Vague Sets-topsis[J].Blasting,2018,35(2):94-100.(in Chinese)
[6] 乐松,赵明生,吴慧,等.茅台三栋高层住宅楼爆破拆除设计与施工[J].爆破,2016,33(3):81-87.[6] YUE Song,ZHAO Ming-sheng,WU Hui,et al.Design and construction of explosive demolition of three high-rise residential buildings in Maotai Brewery[J].Blasting,2016,33(3):81-87.(in Chinese)
[7] 蒙云琪,倪明亮,操鹏,等.基于数值模拟的铁四院前大楼拆除爆破方案优化[J].爆破,2018,35(1):96-103.[7] MENG Yun-qi,NI Liang,CAO Peng,et al.Optimization of demolition blasting scheme of TieSiYuan former building based on numerical simulation[J].Blasting,2018,35 (1):96-103.(in Chinese)
[8] 费鸿禄,杨小庚,周健华,等.18层框架楼房定向爆破倒塌迟缓原因分析[J].爆破,2017,34( 4):149-174[8] FEI Hong-lu,YANG Xiao-geng,ZHOU Jian-hua,et al.Analysis of collapse delay causes of directional explosive-demolition in 18 layers frame buildings[J].Blasting,2017,34( 4):149-174.(in Chinese)
[9] 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.[9] ZHOU Jia-han.Discussion on calculation formula of collapsing vibration velocity caused by blasting demo-lition[J].Engineering Blasting,2009,15(1):1- 4.(in Chinese)
[10] 中华人民共和国国家标准.GB6722—2014爆破安全规程[S].北京:中国标准出版社,2014.
[11] 汪旭光.爆破设计与施工[M].北京:冶金工业出版社,2011.
[12] 黄奇,张智宇,李祥龙,等.爆破振动对砌体结构建筑物的动力响应分析[J].矿治,2018,27(2):19-23.[12] HUANG Qi,ZHANG Zhi-yu,LI Xiang-lon,et al.Dynamic respomse analysis of blasting vibration on masonry building structures[J].Mining&Metallurgy,2016,33(3):81-87.(in Chinese)