胡彬;杨赛群;李洪伟;刘伟;王洪森;王富宁;
HU Bin;YANG Sai-qun;LI Hong-wei;LIU Wei;WANG Hong-sen;WANG Fu-ning;Tianjin Zhiyuan Blasting Engineering Co., Ltd.;School of Chemical Engineering, Anhui University of Science and Technology;Engineering Laboratory of Explosive Materials and Technology of Anhui Province;

• 1:天津致远爆破工程有限公司
• 2:安徽理工大学化学工程学院
• 3:安徽省爆破器材与技术工程实验室

摘要(Abstract)：

在超高钢筋混凝土烟囱拆除爆破中，切口角度的计算对于提高过程中的准确性和安全性具有十分重要的意义。为探究应力破坏准则和弯矩破坏准则两种不同爆破切口角度理论计算方法对钢筋混凝土烟囱的适用性，采用理论计算和数值模拟相结合的方法对切口角度理论计算方法进行优选。结果表明：通过应力破坏准则计算烟囱爆破切口角度较为准确，其对应拆除爆破数值模拟效果较好；把理论计算结果运用到120 m钢筋混凝土烟囱拆除爆破，该烟囱顺利精准倒塌，实现预期爆破效果；切口角度计算方法可为同类工程提供经验和借鉴。
The calculation of cutting angle is of great significance to improve the accuracy and safety in the demolition blasting of an ultra-high reinforced concrete chimney. The applicability of two different theoretical calculation methods of blasting cutting angles, based on stress failure criterion and moment failure criterion, to the reinforced concrete chimney is explored by numerical simulation. The results show that the calculated cutting angle by stress failure criterion is more accurate, because its corresponding numerical simulation effect of demolition blasting is better. The theoretical calculation results are applied to the demolition blasting of a 120 m reinforced concrete chimney, and it collapses smoothly and accurately, achieving the expected blasting effect. The calculation method of cutting angle can provide experience and reference for similar projects.

关键词(KeyWords)： 超高钢混烟囱;拆除爆破;爆破切口角度;数值模拟
ultra-high reinforced concrete chimney;demolition blasting;blasting cutting angle;numerical simulation

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(11872002);; 安徽省高校自然科学研究重点资助项目(KJ2019A0123)

作者(Authors): 胡彬;杨赛群;李洪伟;刘伟;王洪森;王富宁;
HU Bin;YANG Sai-qun;LI Hong-wei;LIU Wei;WANG Hong-sen;WANG Fu-ning;Tianjin Zhiyuan Blasting Engineering Co., Ltd.;School of Chemical Engineering, Anhui University of Science and Technology;Engineering Laboratory of Explosive Materials and Technology of Anhui Province;

DOI: 10.19931/j.EB.20210299

参考文献(References)：

• [1] 程楠.复杂环境下210 m烟囱定向爆破拆除[J].爆破，2021,38(1):100-104.CHENG N.Directional blasting demolition of 210 m chimney under complex conditions[J].Blasting,2021,38(1):100-104.
• [2] 郑桂初，王友新，段丽环，等.180 m高钢筋混凝土烟囱的拆除爆破[J].工程爆破，2019,25(6):56-60.ZHENG G C,WANG Y X,DUAN L H,et al.Demolition blasting of 180 m high reinforced concrete chimney[J].Engineering Blasting,2019,25(6):56-60.
• [3] 洪卫良.120 m高钢筋混凝土烟囱爆破拆除[J].工程爆破，2018,24(2):66-70.HONG W L.Blasting demolition of a 120 m tall reinforced concrete chimney[J].Engineering Blasting,2018,24(2):66-70.
• [4] 焦江南，刘翼，罗伟涛.180 m高的钢筋混凝土烟囱分次定向爆破拆除[J].工程爆破，2018,24(6):61-64.JIAO J N,LIU Y,LUO W T.Demolition of 180 m high reinforced concrete chimney by directional blasting[J].Engineering Blasting,2018,24(6):61-64.
• [5] 涂胜，周献忠，胡方华.复杂环境下85 m两并立钢筋混凝土烟囱爆破拆除[J].爆破，2018,35(4):99-103.TU S,ZHOU X Z,HU F H.Explosive demolition for 85 m“Twins”steel concrete chimneys in complicated surroundings[J].Blasting,2018,35(4):99-103.
• [6] 于淑宝.复杂环境下超高烟囱同向折叠爆破拆除原理及应用研究[D].北京：中国矿业大学，2019.YU S B.Research on the principle and application of folding blasting in the same direction for ultra-high chimneys in complex environments[D].Beijing:China University of Mining & Technology,2019.
• [7] 刘世波.百米以上钢筋混凝土烟囱拆除爆破研究[D].北京：铁道部科学研究院，2004.LIU S B.Study on higher than 100 meters reinforced concrete chimney blasting demolition[D].Beijing:China Academy of Railway Sciences,2004.
• [8] 谢春明，杨军，薛里.高耸筒形结构爆破拆除的数值模拟[J].爆炸与冲击，2012,32(1):73-78.XIE C M,YANG J,XUE L.Numerical simulation of towering tubby structure blasting demolition[J].Explosion and Shock Waves,2012,32(1):73-78.
• [9] 李守巨，刘玉晶.爆破拆除砖烟囱爆破切口范围的计算[J].工程爆破，1999,5(2):1-4.LI S J,LIU Y J.Calculation on gap length of brick chimney in demolition blasting[J].Engineering Blasting,1999,5(2):1-4.
• [10] 王健.高耸烟囱爆破拆除安全性的力学分析[D].唐山：河北理工大学，2005.WANG J.Mechanics analysis on safety of demolition of tall chimneys by controlled blasting[D].Tangshan:North China University of Science and Technology,2005.
• [11] 金骥良，顾毅成，史雅语.拆除爆破设计与施工[M].北京：中国铁道出版社，2004:154-155.JIN J L,GU Y C,SHI Y Y.Design and construction of demolition blasting[M].Beijing:China Railway Publishing House,2004:154-155.
• [12] 徐鹏飞，刘殿书，张英才.烟囱高位组合切口定向爆破倒塌过程数值研究[J].振动与冲击，2017,36(15):265-270.XU P F,LIU D S,ZHANG Y C.Numerical study on the directional blasting collapse process of chimney with high combined incision[J].Journal of Vibration and Shock,2017,36(15):265-270.
• [13] 褚怀保，徐鹏飞，叶红宇，等.钢筋混凝土烟囱爆破拆除倒塌与受力过程研究[J].振动与冲击，2015,34(22):183-186.CHU H B,XU P F,YE H Y,et al.Collapse process and load-bearing process of reinforced concrete chimney during blasting demolition[J].Journal of Vibration and Shock,2015,34(22):183-186.