19层楼房单向折叠爆破拆除
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摘要
通过4切口单向折叠爆破拆除技术成功爆破19层楼房。工作中通过人工加机械的方法预先拆除切口处砖墙和部分剪力墙,"化墙为柱"有效地降低了工程量和爆破量;在最后一排立柱间的预制板上开1条15 cm宽的缝有利于楼房的轴向运动,对楼房倾倒方向的控制起到了至关重要的作用。特别针对楼房高度高,自重大的特点,设计了3条0.5 m×1.5 m×60 m以黄沙堆砌的缓冲带,成功地将楼房倒地的触地振动控制在安全范围之内。除合理安排单响起爆药量外在保护体与振源之间开挖减振沟可以有效地保证触地振动和爆破振动不会伤害周围建筑。
A 19-storey building was demolished by unidirectional fold blasting with 4 cuts.The brick wall and parts of shear wall in the incision were pretreated by manual and mechanical methods,which effectively reduced the power of engineering and blasting.A 15 cm wide slit was cut out in the precast slab between uprights in the last row,which was helpful for the axial movement of the buildings and ensured the collapse direction.Due to the characteristic of height and self-weight,3 buffers zones composed of sand(0.5 m×1.5 m×60 m) were piled up to control the vibration of touchdown.Beside of the reasonable charge amount per delay,ditching vibration damping ditch between the protected body and the blast source,the surrounding buildings were undamaged by the touchdown vibration and blasting vibration.
A 19-storey building was demolished by unidirectional fold blasting with 4 cuts.The brick wall and parts of shear wall in the incision were pretreated by manual and mechanical methods,which effectively reduced the power of engineering and blasting.A 15 cm wide slit was cut out in the precast slab between uprights in the last row,which was helpful for the axial movement of the buildings and ensured the collapse direction.Due to the characteristic of height and self-weight,3 buffers zones composed of sand(0.5 m×1.5 m×60 m) were piled up to control the vibration of touchdown.Beside of the reasonable charge amount per delay,ditching vibration damping ditch between the protected body and the blast source,the surrounding buildings were undamaged by the touchdown vibration and blasting vibration.
引文
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[12]王斌,梁开水.拆除爆破中缓冲层的受力变形与防护作用[J].采矿技术,2007,7(3):149-152.[12]WANG Bin,LIANG Kai-shui.Demoliton blasting of thebuffer layer deformation and protective effect[J].MiningTechnology,2007,7(3):149-152.(in Chinese)
[13]郭涛,高振儒,范磊,等.不同位置条件下减震沟减震效应的数值模拟[J].爆破器材,2010,39(2):7-9.[13]GUO Tao,GAO Zhen-ru,FAN Lei,et al.Numericalsimulation of damping effect of damping ditch with differ-ent location[J].Explosive Materials,2010,39(2):7-9.(in Chinese)
[2]王玉杰.爆破工程[M].武汉:武汉理工大学出版社,2007.
[3]汪旭光,郑炳旭,张正忠,等.爆破手册[M].北京:冶金工业出版社,2010.
[4]夏军,周明安,丁育青.烟囱爆破切口角度高度数值模拟研究[J].爆破,2009,26(4):70-73.[4]XIA Jun,ZHOU Ming-an,DING Yu-qing.Numerical sim-ulation of precutting's angle and height of chimney blasting[J].Blasting,2009,26(4):70-73.(in Chinese)
[5]马红卫,郑健礼,刘鹏虎.125m高钢筋砼排气塔定向爆破拆除[J].爆破,2010,27(4):85-87.[5]MA Hong-wei,ZHENG Jian-li,LIU Peng-hu.Directiona-lexplosive demolition of 125 m reinforced concrete exhau-sttower[J].Blasting,2010,27(4):85-87.(in Chinese)
[6]张修玉,张义平,池恩安,等.烟囱绕爆破切口直径转动惯量的解法[J].爆破,2010,27(4):81-84.(in Chi-nese)[6]ZHANG Xiu-yu,ZHANG Yi-ping,CHI En-an.Calculationmethods of Rotational inertia of chimney around blastingcut diameter[J].Blasting,2010,27(4):81-84.(inChinese)
[7]魏晓林,魏挺峰.爆破拆除高耸建筑下坐动力方程[J].合肥工业大学学报(自然科学版),2009,32(10):1457-1461.[7]WEI Xiao-lin,WEI Ting-feng.Dynamic equations for sit-ting down of high buildings demolished by blasting[J].Journal of Hefei University of Technology(Natural Sci-ence),2009,32(10):1457-1461.(in Chinese)
[8]汪浩.超薄全剪力墙高层建筑多方向倾倒控制爆破拆除[J].工程爆破,2007,13(1):55-58.[8]WANG Hao.Controlled blasting demolition of a highbuilding with super-thinshear-wall structure by multi-di-rectional collaspsing[J].Engineering Blasting,2007,13(1):55-58.(in Chinese)
[9]李本伟,陈德志,张萍,等.180m高钢筋混凝土烟囱爆破拆除[J].爆破,2011,26(4):41-45.[9]LI Ben-wei,CHEN De-zhi,ZHANG Ping,et al.Demoli-tion of a 180-meter-superheight reinforced concrete chim-ney by directional blasting[J].Blasting,2011,26(4):41-45.(in Chinese)
[10]叶洲元,马建军.爆破拆除高耸建筑物触地危害分析与控制[J].中国安全科学学报,2010,20(2):150-154.[10]YE Zhou-yuan,MA Jian-jun.Harm analysis of collapseand touchdown of tower buildings in demolition blastingand its control measures[J].China Safety Science Jour-nal,2010,20(2):150-154.(in Chinese)
[11]胡锐.框架结构定向拆除爆破模拟及触地震动研究[D].武汉:武汉理工大学,2008.[11]HU Rui.Frame structure of directional demolition blas-ting and touchdown vibration simulation research[D].Wuhan:Wuhan University of Technology,2008.(inChinese)
[12]王斌,梁开水.拆除爆破中缓冲层的受力变形与防护作用[J].采矿技术,2007,7(3):149-152.[12]WANG Bin,LIANG Kai-shui.Demoliton blasting of thebuffer layer deformation and protective effect[J].MiningTechnology,2007,7(3):149-152.(in Chinese)
[13]郭涛,高振儒,范磊,等.不同位置条件下减震沟减震效应的数值模拟[J].爆破器材,2010,39(2):7-9.[13]GUO Tao,GAO Zhen-ru,FAN Lei,et al.Numericalsimulation of damping effect of damping ditch with differ-ent location[J].Explosive Materials,2010,39(2):7-9.(in Chinese)
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