框架结构楼房定向爆破拆除后坐控制措施及应用  

Control Measures and Application of Recoil in Directional Blasting Demolition of Framed Buildings

作　　者：王威 贾永胜 韩传伟[1,2,3] 黄小武 韩宇[1,2,3] 伍岳 WANG Wei;JIA Yong-sheng;HAN Chuan-wei;HUANG Xiao-wu;HAN Yu;WU Yue(Hubei(Wuhan)Explosions and Blasting Technology Institute of Jianghan University,Wuhan 430056,China;Hubei Key Laboratory of Blasting Engineering,Wuhan 430056,China;Wuhan Explosions and Blasting Corporation Limited,Wuhan 430056,China)

机构地区：[1]江汉大学湖北(武汉)爆炸与爆破技术研究院,武汉430056 [2]爆破工程湖北省重点实验室,武汉430056 [3]武汉爆破有限公司,武汉430056

出　　处：《爆破》2021年第2期105-110,117,共7页Blasting

基　　金：建筑物爆破拆除钢筋混凝土破坏机制2020CFA043-湖北省自科基金重点项目(创新群体)。

摘　　要：框架结构楼房在定向爆破拆除时容易产生后坐现象,对后侧保护目标构成巨大威胁。结合城市复杂环境下框架结构楼房定向爆破拆除设计施工实践,对控制框架结构楼房后坐的方法进行分析和探讨,并采用LS-DYNA动力学有限元软件对方法的合理性进行数值仿真验算。实践结果表明:采用抬高爆破切口至2层,切口后排立柱不钻孔爆破的方案,可以有效防止或减少框架结构楼体后坐现象,爆破后楼体1层后部立柱均保持完好,在1层和2层连接处折断,1层前部立柱受楼体塌落冲击作用折断,楼体爆堆堆积高度与从1层爆破相比并无明显差异,爆破效果良好,并且前排底部立柱可以作为缓冲层大大消耗楼体塌落冲击的动能,削弱触地振动效应,减小塌落振动对周边环境的影响。The phenomenon of recoiling is easy to occur in the demolition of framed buildings by directional blasting,which poses a great threat to the protection target of the rear side protection.Combined with the design and construction practice of directional blasting demolition of frame structure buildings in complex urban environment,the method of controlling the recoiling of frame structure buildings is analyzed and discussed,and the rationality of the method is verified by numerical simulation with LS-DYNA dynamic finite element software.Practical results show that the scheme of raising the blasting incision to the second floor and not drilling and blasting the columns behind the incision can effectively prevent or reduce the recoil phenomenon of the frame structure building.After the blasting,the columns of the first floor and the rear side of the building are maintainedand broke off at the junction of the first and second floors.The front column of the first floor was broken off by the impact of the collapse of the building.The height of the blasting pile of the building is not significantly different from that of the 1st floor blasting.The blasting effect is good,and the front bottomcolumn can be used as a buffer layer to greatly consume the kinetic energy of the collapse impact of the building,weaken the vibration effect of the ground contact,and reduce the impact of the collapse vibration on the surrounding environment.

关 键 词：框架结构楼房 定向爆破 后坐 控制措施 

分 类 号：TU746.5[建筑科学—建筑技术科学]