陈永麟;张九泽;魏志荣;李启东;李舸;张鹏泉;
CHEN Yong-lin;ZHANG Jiu-ze;WEI Zhi-rong;LI Qi-dong;LI Ge;ZHANG Peng-quan;Gansu Jiulian Blasting Engineering Limited Corp;

• 1:甘肃久联爆破工程有限公司

摘要(Abstract)：

为了安全拆除镶有倒锥形水箱钢筋混凝土复合结构的烟囱,运用有限元软件对该烟囱爆破拆除的倒塌过程进行模拟,得出距触地中心50m处,被保护的框架结构楼房基础位置(4#测点)质点振动峰值1.5cm/s。考虑框架结构楼房在触地振动作用下的响应问题,对该楼房2、4、6、8、12楼层质点峰值振动速度进行了监测和分析。结果表明:各楼层测点触地振动普遍大于爆破振动,振动速度整体随楼层的增高呈衰减趋势,但4、6层测点触地振动的质点峰值振动速度分别为0.622、0.741cm/s,大于基础位置触地振动的质点峰值振动速度0.518cm/s,放大倍数达1.21与1.45。根据数值模拟和监测分析的结果,对镶有倒锥形水箱的烟囱爆破拆除的安全防护,采取了开挖水箱承接坑,沿倒塌中心线方向铺设软垫层,开挖减振沟等方式,取得了较好的效果。振动危害未对框架结构楼房产生影响,整个爆破过程中水箱没有因撞击引起物理爆炸,触地飞石控制在安全范围之内,通过牵引钢丝绳使待拆烟囱倒塌方向无偏离,达到了预期效果,保证了周围建筑物的安全。测点位置的布置可为类似工程提供参考。
In order to safe demolition of chimney with reinforced concrete composite structure inlaid with inverted conical water tank.The finite element software was used to simulate the collapsing process of the chimney.The vibration peak value of the base point of the frame structure at the distance of 50 mfrom the touchdown center reached 1.5 cm/s,considering the response problem under the vibration of the frame structure touchdown,the vibration velocity were monitored of the 2 nd,4 th,6 th,8 th,and 12 th floor of the certain frame structure.The analysis results showed that the touchdown vibration at each measurement point was generally greater than the blasting vibration,and the vibration velocity was integral damping with the floor increase.However,the touchdown vibration peaks at the measuring points of the 4 th and 6 th floors were0.622 cm/s and 0.741 cm/s respectively,which is greater than the touchdown vibration velocity at the base position of 0.518 cm/s,and the magnification ratio reached 1.21 and 1.45.According to the results of numerical simulation and monitoring analyzed.In actual construction,pits were excavated for tanks,cushioned layers were laid in the direction of the collapsed center line,and vibration isolation trencheswere excavated,good results had been achieved.Vibration hazards do not affect the building;there was no impact explosives in the tank during the entire blasting process.The touch-stone was controlled within the safety range;the expected direction was achieved by hauling the wire rope to the direction where the explosivebody collapsed,which achieved the desired results and ensured the safety of the surrounding building structure.The arrangement of the measuring point position can provide reference for similar projects.

关键词(KeyWords)： 钢筋混凝土烟囱;数值模拟;控制爆破;触地振动
reinforced concrete chimney;numerical simulation;controlled blasting;touchdown vibration

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 陈永麟;张九泽;魏志荣;李启东;李舸;张鹏泉;
CHEN Yong-lin;ZHANG Jiu-ze;WEI Zhi-rong;LI Qi-dong;LI Ge;ZHANG Peng-quan;Gansu Jiulian Blasting Engineering Limited Corp;

参考文献(References)：

• [1]吴欣欣,朱宽,黄小武,等.50 m高砖结构烟囱爆破拆除数值模拟[J].西南科技大学学报,2017,32(1):58-63.WU X X,ZHU K,HUANG X W,et al.Numerical simulation of blasting demolition of 50 m high brick chimney[J].Journal of Southwest University of Science and Technology,2017,32(1):58-63.
• [2]王振涛,陈政,袁绍国,等.基于LS-DYNA下水塔爆破拆除模拟的研究[J].煤炭与化工,2017,40(7):77-79,83.WANG Z T,CHEN Z,YUAN S G,et al.Study on blasting demolition simulation of water tower based on LS-DYNA[J].Coal and Chemical Industry,2017,40(7):77-79,83.
• [3]陈永麟,马建军,李玉能,等.框架结构楼房爆破震动响应的数值模拟[J].爆破,2018,35(1):154-160.CHEN Y L,MA J J,LI Y N,et al.Numerical simulation of blasting vibration response of frame structure building[J].Blasting,2018,35(1):154-160.
• [4]赵利坤,曹跃,褚夫蛟,等.52 m高裂缝砖烟囱小切口定向爆破拆除[J].工程爆破,2012,18(1):59-61,55.ZHAO L K,CAO Y,CHU F J,et al.Demolition of a 52mhigh crack brick chimney by small incision directional blasting[J].Engineering Blasting,2012,18(1):59-61,55.
• [5]冯叔瑜.城市控制爆破[M].北京:中国铁道出版社,2000.FENG S Y.Urban controlled blasting[M].Beijing:China Railway Publishing House,2000.
• [6]汪旭光.爆破手册[M].北京:冶金工业出版社,2010.WANG X G.Blasting manual[M].Beijing:Metallurgical Industry Press,2010.
• [7]徐鹏飞,张英才,盖四海,等.180m钢筋混凝土烟囱两段单向控制爆破拆除[J].爆破,2017,34(1):129-132,147.XU P F,ZHANG Y C,GAI S H,et al.Two-stage controlled blasting demolition of 180 m reinforced concrete chimney[J].Blasting,2017,34(1):129-132,147.
• [8]张计璨.复杂环境下钢筋混凝土水塔定向爆破拆除[J].煤矿爆破,2017(3):33-35.ZHANG J C.Demolition of reinforced concrete water tower by directional blasting in complex environment[J].Coal Mine Blasting,2017(3):33-35.
• [9]杨明山,付玉华,张吉勇,等.复杂环境下62m高烟囱的拆除爆破及安全控制[J].工程爆破,2017,23(2):53-57.YANG M S,FU Y H,ZHANG J Y,et al.Demolition blasting and safety control of 62mhigh chimney in complex environment[J].Engineering Blasting,2017,23(2):53-57.
• [10]徐鹏飞,刘殿书,张英才,等.钢筋混凝土烟囱高位切口爆破拆除数值模拟研究[J].爆破,2016,33(3):96-100.XU P F,LIU D S,ZHANG Y C,et al.Numerical simulation study on blasting concrete chimney highlevel incise-on blasting demolition[J].Blasting,2016,33(3):96-100.
• [11]刘世波,曲云龙,薛里,等.高层建筑物单向三折叠爆破拆除数值模拟[J].工程爆破,2017,23(3):77-80.LIU S B,QU Y L,XUE L,et al.Numerical simulation of unidirectional three-fold blasting demolition of high-rise buildings[J].Engineering Blasting,2017,23(3):77-80.
• [12]张志毅,杨年华,卢文波,等.中国爆破振动控制技术的新进展[J].爆破,2013,30(2):25-32.ZHANG Z Y,YANG N H,LU W B,et al.New development of chinese blasting vibration control technology[J].Blasting,2013,30(2):25-32.
• [13]邹玉君,严鹏,刘琳,等.白鹤滩水电站坝肩边坡爆破振动对周边民房影响评价及控制[J].振动与冲击,2018,37(1):248-258.ZOU Y J,YAN P,LIU L,et al.Evaluation and control of blasting vibration of dam abutment slope of Baihetan Hydropower Station on surrounding residential buildings[J].Journal of Vibration and Shock,2018,37(1):248-258.
• [14]江云星,陶铁军.预拆除对薄壁双曲型冷却塔爆破拆除的影响[J].工程爆破,2018,24(1):57-62.JIANG Y X,TAO T J.Effect of pre-dismantling on blasting demolition of thin-walled hyperbolic cooling tower[J].Engineering Blasting,2018,24(1):57-62.
• [15]国家安全生产监督管理总局.爆破安全规程:GB6722-2014[S].北京:中国标准出版社,2015.State Administration of Work Safety.Safety regulations for blasting:GB 6722-2014[S].Beijing:China Standards Press,2015.
• [16]曹娟,申雷,盖四海,等.突变截面高烟囱分段爆破拆除及振动控制[J].工程爆破,2017,23(1):51-54,76.CAO J,SHEN L,GAI S H,et al.Sectional blasting demolition and vibration control of high-profile chimney with abrupt section[J]. Engineering Blasting,2017,23(1):51-54,76.
• [17]刘阳春,吴同成,魏善太.复杂环境下混凝土水塔爆破拆除施工工艺[J].现代矿业,2017,33(5):259-260.LIU Y C,WU T C,WEI S T.Construction technology of blasting demolition of concrete water tower in complex environment[J].Modern Mining,2017,33(5):259-260.
• [18]张计璨.复杂环境下钢筋混凝土水塔定向爆破拆除[J].煤矿爆破,2017(3):33-35.ZHANG J C.Demolition of reinforced concrete water tower by directional blasting in complex environment[J].Coal Mine Blasting,2017(3):33-35.
• [19]戴建毅,汪艮忠,周珉.复杂环境下复杂结构水塔爆破拆除[J].工程爆破,2015,21(4):37-40.DAI J Y, WANG Y Z, ZHOU M.Blasting demolition of complex structure water tower in complex environment[J].Engineering Blasting,2015,21(4):37-40.