复杂环境下爆破拆除130m多管式套筒烟囱的数值模拟研究  

Numerical Simulation on Blasting Demolition of 130 m Multi-tube Sleeve Chimney Under Complex Environment

作　　者：赵盟乔 陈磊 王猛[1] 罗宁 权树恩 刘桐 ZHAO Meng-qiao;CHEN Lei;WANG Meng;LUO Ning;QUAN Shu-en;LIU Tong(College of Chemical Engineering and Blasting,Anhui University of Science&Technology,Huainan 232000,China;Zhejiang Qin Nuclear Environmental Construction Co.,LTD.,Shaoxing 312000,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,China;Zhejiang High Energy Blasting Engineering Co.,LTD.,Shaoxing 312000,China)

机构地区：[1]安徽理工大学化工与爆破学院,淮南232000 [2]浙江秦核环境建设有限公司,绍兴312000 [3]中国矿业大学力学与土木工程学院,徐州221116 [4]浙江省高能爆破工程有限公司,绍兴312000

出　　处：《爆破》2024年第4期128-135,共8页Blasting

基　　金：国家自然科学基金资助项目(12372373)。

摘　　要：针对130 m多管式套筒烟囱的爆破拆除工程,使用LS-DYNA有限元软件,采用分离式共节点模型,通过单元失效的方式模拟爆破切口,对多管式套筒烟囱的倒塌过程进行数值模拟分析,并与实际爆破效果对比。结果表明:爆破切口成形时,有效应力主要集中于剩余支撑部分的边缘处,但由于外烟囱和内部筒体材料性质和长细比不同,切口闭合阶段的下坠速度会有所不同,通过模拟发现内外同时起爆会使得外部烟囱和钢内筒在切口闭合阶段发生碰撞,选择内外部件延期两秒的起爆方式会取得理想的倒塌效果。For the blasting and demolition project of a 130 m multi-tube sleeve chimney,the LS-DYNA finite element software was used to simulate the blasting incision by unit failure using a separated common-node model.The collapse process of the multi-tube sleeve chimney was numerically simulated,analyzed and compared with the actual blasting effect.The results show that the effective stress is mainly concentrated on the edge of the remaining part of the support when the blasting notch is forming.However,the notch closure stage of the falling speed is different due to the length and slenderness ratio and the nature of the material of the outer chimney and the inner sleeve are different.The simulation shows that the external chimney and the steel inner tube would be collisional at the notch closure stage as the internal and external detonation simultaneously.Choosing the detonation method with a delay of two seconds between internal and external components will achieve the ideal collapse effect.

关 键 词：多管式套筒烟囱 爆破拆除 数值模拟 定向拆除 

分 类 号：TU746.5[建筑科学—建筑技术科学]