基于数值模拟的铁四院前大楼拆除爆破方案优化  

Optimization of Demolition Blasting Scheme of Tie Si Yuan Former Building based on Numerical Simulation

作　　者：蒙云琪 倪明亮 操鹏 王宇[2] 李小贝 孙金山[2] 张兆龙 MENG Yun-qi1 ,NI Ming-liang2, CAO Peng1, WANG Yu2 ,LI Xiao-bei1 ,SUN Jin-shan2 ,ZHANG Zhao-long1(1. China Railway Siyuan Group Geotechnical Engineering Co LTD, Wuhan 430063, China ; 2. China University of Geosciences （Wuhan） , Wuhan 430074, China)

机构地区：[1]中铁四院集团岩土工程有限责任公司,武汉430063 [2]中国地质大学(武汉),武汉430074

出　　处：《爆破》2018年第1期96-103,160,共9页Blasting

摘　　要：爆破拆除的铁四院前大楼为砖混外套框架的"楼包楼"特殊结构,周边环境复杂。为确定合理的爆破拆除方案和爆破参数,控制其倒塌姿态和爆堆范围,利用ANSYS/LS-DYNA有限元软件,建立分离式耦合模型,对多个拆除爆破方案进行模拟分析,确定了单向折叠爆破方案,并对折叠爆破方案中的切口起爆时差,立柱破坏部位,立柱爆高等参数进行优化,其中上下切口起爆时差调整为1020 ms,中间与两侧时差为880 ms,后排支撑区立柱实施松动爆破,同时提高上切口立柱爆破高度。采用优化方案,建筑物被成功爆破,结构折叠形态明显,爆破效果理想。实际爆破结果表明,爆破切口的形成和闭合、结构倒塌过程、塌落范围与形态等与模拟结果基本一致。The building demolition in TieSiYuan was very special, with a frame structure hugged a masonry-con- crete structure and complex surrounding. In order to design a reasonable blasting demolition plan and appropriate blasting parameters to control the collapse posture and the extent of fragments, a separated coupling model was estab- lished to simulate different blasting demolition schemes by using ANSYS/LS-DYNA finite element software. Compa- ring the simulation results of two original plans, the unidirectional folded collapse model was adopted. The parameters of the plan were optimized, including the delay time of blasting cut, blasting part of columns, blasting height of the columns. The time difference between the upper and lower incisions was adjusted to 1020 ms, the time difference be- tween the middle and the two sides was 880 ms, and the colunm of rear support area was carried out with loose blas- ting. Meanwhile, the blasting height of the column in the upper incision was improved. With the optimization scheme, the building was successfully demolished, the structure was obviously folded. The actual blasting results are all con- sistent with the simulation results, including the formation and closure of blasting incision, the process of structural collapse, the scope and form of collapse and so on.

关 键 词：框架结构 爆破拆除 数值模拟 方案优化 

分 类 号：TU746.5[建筑科学—建筑技术科学]