复杂环境下框-筒结构楼房内向折叠爆破拆除技术研究  

Study on Inward Folding Blasting Demolition Technology of Frame Tube Structure Building in Complex Environment

作　　者：费鸿禄 张广贝 何文斌 钱起飞 胡刚 FEI Hong-lu;ZHANG Guang-bei;HE Wen-bin;QIAN Qi-fei;HU Gang(Blasting Technology Research Institute,Liaoning Technical University,Fuxin 123000,China;Liaoning Gongda Blasting Engineering Co.,Ltd.,Fuxin 123000,China)

机构地区：[1]辽宁工程技术大学爆破技术研究院,阜新123000 [2]辽宁工大爆破工程有限责任公司,阜新123000

出　　处：《爆破》2021年第1期80-86,共7页Blasting

摘　　要：通过对待拆框-筒结构楼房的周围环境和结构特性分析,采用“内向折叠”的爆破拆除方案。利用ABAQUS有限元分析软件对预拆除后建筑结构的稳定性分析,结合应力分布状况确定预处理方案。结果表明:立柱受弯矩较为明显,钢筋在最大拉应力作用下处于弹性工作状态;框架结构内应力合理,有向中心弯曲变形的趋势,结构处于稳定状态。爆破方案选取较大炸高,在1、2、4、5层布设爆破切口,切口由上而下逐渐增大;单层20根立柱根据位置设计不同爆破参数与延期时间,采用11个段别半秒延期雷管形成的孔内延期与3个段别毫秒延期雷管形成的孔外延期相结合的爆破网路。为保证倒塌方向和控制触地振动,个别位置立柱延期时间作出了调整,结合有效安全防护和减振措施,达到了设计预期爆破效果。According to the surrounding environment and structural characteristics of a frame tube structure building to be demolished,the blasting demolition scheme of“inward folding”was adopted.The finite element analysis software ABAQUS was used to analyze the stability of the pre-demolished building structure and determine the pretreatment scheme combined with the stress distribution.The results show that the moment applied to the column was obvious,and the reinforcement was in elastic working state under the maximum tensile stress;the internal stress of the frame structure was reasonable.Bending deformation presented a trend towards the center,and the structure was in a stable state.In the blasting scheme,high blasting point was selected.In addition,blasting cuts were arranged in layers 1,2,4 and 5,and the cuts were gradually increased from top to bottom.Various blasting parameters and delay times were set according to the positions of 20 single-layer columns,and the blasting network consisted of 11 half second delay detonators and 3 millisecond delay detonators.In order to ensure the collapse direction and control the ground vibrations,the delay times of columns at individual positions were adjusted.Combined with effective safety protection and vibration reduction measures,the blasting effect had met the design expectation.The study can be used as reference for similar projects.

关 键 词：框-筒结构楼房 内向折叠 爆破拆除 预处理 爆破网路 

分 类 号：TU746.5[建筑科学—建筑技术科学]