砖混结构楼房逐段向内倾倒爆破拆除  

Blasting Demolition of Brick-concrete Structure Building by Piecewise and Inward Collapse

作　　者：刘昌邦 贾永胜[1,2] 黄小武 孙金山[1] 姚颖康 伍岳[1,2] LIU Chang-bang;JIA Yong-sheng;HUANG Xiao-wu;SUN Jin-shan;YAO Ying-kang;WU Yue(Hubei Key Laboratory of Blasting Engineering,Jianghan University,Wuhan 430056,China;Wuhan Explosions&Blasting Co.,Ltd.,Wuhan 430056,China)

机构地区：[1]江汉大学爆破工程湖北省重点实验室,武汉430056 [2]武汉爆破有限公司,武汉430056

出　　处：《爆破》2021年第3期82-87,共6页Blasting

基　　金：湖北省自科基金重点项目(创新群体2020CFA043);湖北省重点研发计划项目(2020BCA084)。

摘　　要：针对异形砖混结构楼房爆破拆除,且定向倒塌空间不足的技术难题,基于某7层“凹”型砖混结构楼房爆破拆除工程实践,提出了“原地坍塌和定向倾倒相结合”的逐段向内倾倒爆破拆除方法。通过创新设计爆破切口、孔网参数和爆破网路,实现了预期的爆破拆除效果。运用ANSYS/LS-DYNA有限元分析软件,模拟分析了楼房倒塌过程,验证了设计方案的科学性。结果表明:楼房中部楼体先触地,两侧楼体逐段向内倾倒,基本无后坐现象,可按设计方案坍塌,模拟结果与爆破结果基本一致;两侧拐角及南北中部区域有爆堆溢出楼房原址范围,需重点考虑该位置的倒塌空间余量,并采取有效的安全防护措施。采用逐段向内倾倒方案爆破拆除异形砖混结构楼房,达到了减小楼房塌落堆积范围、改善破碎解体效果的目的。Aiming at the technical problems of the irregular brick concrete structure building demolition by blasting and the lack of directional collapse space,a demolition method of in-situ collapse combined with directional toppling'was proposed based on a blasting demolition engineering practice of a 7-story‘凹’style brick-concrete structure building.By innovative design of blasting cut,hole network parameters and blasting network,an expected blasting demolition effect was achieved.Using ANSYS/LS-DYNA finite element analysis software,the process of building collapse was simulated and the scientific nature of the design scheme was verified.The results show that the middle part of the building touches the ground first,and the two sides of the building are collapsed piecewisely and inwardly.There is basically no recoiling phenomenon,and it can collapse according to the design scheme.The simulation results are basically consistent with the blasting results.In the corner on both sides and north-south and central area,the explosion pile overflowed the original site of the building,so it is necessary to pay attention to the collapse space margin at this location,and take effective safety protection measures.By the method of piecewise and inward collapse,the demolishing of the special-shaped brick-concrete structure building has achieved the purpose of reducing the collapse accumulation range of the building and improving the disintegration effect.

关 键 词：爆破拆除 砖混结构楼房 向内倾倒爆破 爆破效果 数值模拟 

分 类 号：TU746.5[建筑科学—建筑技术科学]