夏治园,杨帆,王刚,马立飞,杨翎,陈欢,罗国安,高朋飞

• 1:安徽江南爆破工程有限公司
• 2:安徽理工大学土木建筑学院
• 3:安徽江南化工股份有限公司

摘要(Abstract)：

针对某地18层椭圆形框架-核心筒结构楼房爆破拆除工况，通过系统分析楼房受力特征发现：椭圆形框筒结构楼房高宽比小、跨度长等特点，易发生后座甚至塌而不倒现象，核心筒内部剪力墙分布不规则，倒塌时易出现应力分布不均现象，导致楼体偏移设计方向。针对上述工程难点，设计时采用延期爆破、辅助弱化方式进行爆破拆除，首先通过拆分切割、化筒为墙等预处理方式破坏楼房抗侧移结构属性，避免楼体倒塌时发生偏移，再将爆破切口细致划分成4个爆破分区并逐步增大各区延期时间，尤其是将最后两分区延期时间提高至1 s,实现余留区域支撑点前移，避免塌而不倒现象，同时适当增大最末段起爆区域的支撑面积以控制后座，设计中选用上下双切口折叠爆破方法，控制楼房触地振动幅度，提高楼房整体解离效果。现场爆破拆除时，椭圆形楼房倒塌过程历时约5 s,基本沿设计方向倒塌，存在轻微后座，支柱失效明显，各层楼板依次折叠，爆堆集中，拆除爆破效果良好，为类似工程提供了借鉴。

关键词(KeyWords)： 椭圆形楼房;框架-核心筒;爆破参数设计;控制爆破;倒塌条件

Abstract:

Keywords:

基金项目(Foundation): 安徽省爆破器材与技术工程实验室开放基金重点项目(编号：AHBP2022A-02);; 安徽理工大学专利转化培育项目(编号：ZL201908)~~

作者(Author): 夏治园,杨帆,王刚,马立飞,杨翎,陈欢,罗国安,高朋飞

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