Zhanjiang Kuangda Blasting Co. ,Ltd.
Guangdong Zhongren Blasting Engineering Co. ,Ltd.

对复杂环境下某市区违规建筑楼群中的2座22层框架楼房进行一次爆破拆除。根据周围倒塌距离计算和框架楼房的特点，采用对向倒塌爆破拆除方案，均设计采用单梯形切口，结合理论与实践经验，经试爆后选取爆破参数和切口高度，确定柱间间隔时间，通过四通与簇联相结合的复式起爆网路，使2座楼房间隔3 s起爆，实现分段整体触地解体。并采取合理的防护措施，有效减弱了爆破振动和触地振动，爆破达到预期效果。

Two 22-story frame buildings in a group of urban illegal buildings under complex environment are demolished at one time. According to the collapse distance and the characteristics of the frame building, the opposite collapse blasting demolition scheme is adopted, and the single-ladder notch is designed. Combined theory with practical experiences, blasting parameters and the height of the notch are selected after test , and the interval time between the columns is determined. Through the compound initiation network combined four-way with cluster, the two buildings are detonated 3s apart, and the segmented overall touchdown disintegration is realized. Reasonable protective measures are taken to effectively reduce the blasting and touchdown vibration, and the blasting achieved the expected effect.

0 引言
1 工程概况
1.1 周边环境
1.2 楼房结构
1.3 爆破难点分析
2 爆破总方案设计
3 预拆除措施
4 爆破参数设计
4.1 切口参数设计
4.2 立柱切口炮孔参数设计
1)典型立柱炮孔布置如图5所示。
2)立柱爆破参数
①立柱破坏高度
②后支撑铰链高度
③立柱爆破层数设计
④钻孔直径
4.3 典型立柱爆破参数
4.4 切口延期时间及起爆网路设计
1)A3-1切口延时设计：
2)A3-2切口延时设计：
3)起爆网路设计：
5 爆破安全防护措施
6 爆破触地振动校核
7 爆破效果
8 结论

[1]张文龙,王艳红,郑文富,等.复杂环境下22层框架楼房对向倒塌爆破拆除[J].煤矿爆破,2023,41(04):29-33.

ZHANG Wenlong, WANG Yanhong, ZHENG Wenfu,et al. Blasting demolition of 22-story frame building collapsing to opposite direction under complex environment[J]. Coal Mine Blasting,2023,41(4):29-33.