非对称结构脱硫塔拆除方案对比研究
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摘要
为了探索拆除非对称结构脱硫塔的合理方案,对塔体拆除常见的机械拆除和爆破拆除进行了比较、分析。机械拆除是将脱硫塔分为3部分拆除,对每一段的拆除条件和各项参数进行计算,最后进行稳定性验算,确定临界破坏条件;爆破拆除是利用ANSYS/LS-DYNA模拟软件对脱硫塔的整个爆破倒塌过程进行数值模拟,根据第1主应力分析塔体倒塌状态和应力变化,论证爆破方法的可行性。比较和分析的结果是,机械拆除和爆破拆除均可用,根据内蒙古霍林格勒市霍煤鸿骏铝电有限责任公司厂区内的烟气脱硫塔拆除的情况,确定选用机械拆除。为类似工程施工方法的选取提供了经验和参考价值。
In order to explore a reasonable plan to demolish the asymmetric structure desulfurization tower,the common mechanical demolition and blasting demolition of the tower body removal are compared and analyzed.Mechanical demolition is to divide the desulfurization tower into 3 parts,calculate the removal conditions and parameters of each section,and finally carry out stability check and determine the critical failure conditions;the blasting demolition is to use the ANSYS/LS-DYNA simulation software to the desulfurization tower.The whole blasting collapse process is numerically simulated.The collapse state and stress change of the tower body are analyzed according to the first principal stress,and the feasibility of the blasting method is demonstrated.The results of the comparison and analysis are that both mechanical demolition and blasting demolition are available.According to the demolition of the flue gas desulfurization tower in the plant area of Huojun Hongjun Aluminum & Electric Co.,Ltd.,Hollingrad,Inner Mongolia,the mechanical demolition is selected.It provides experience and reference value for the selection of similar engineering construction methods.
In order to explore a reasonable plan to demolish the asymmetric structure desulfurization tower,the common mechanical demolition and blasting demolition of the tower body removal are compared and analyzed.Mechanical demolition is to divide the desulfurization tower into 3 parts,calculate the removal conditions and parameters of each section,and finally carry out stability check and determine the critical failure conditions;the blasting demolition is to use the ANSYS/LS-DYNA simulation software to the desulfurization tower.The whole blasting collapse process is numerically simulated.The collapse state and stress change of the tower body are analyzed according to the first principal stress,and the feasibility of the blasting method is demonstrated.The results of the comparison and analysis are that both mechanical demolition and blasting demolition are available.According to the demolition of the flue gas desulfurization tower in the plant area of Huojun Hongjun Aluminum & Electric Co.,Ltd.,Hollingrad,Inner Mongolia,the mechanical demolition is selected.It provides experience and reference value for the selection of similar engineering construction methods.
引文
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[11]苏浩然.框架结构楼房内爆法爆破拆除数值模拟研究[J].工程建设与设计,2016(10):30-31.SU H R.Numerical simulation research on blasting demolition of a frame structure building[J]Engineering Construction and Design,2016(10):30-31.
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[2]潘胜,周俊波,郭淑芬.烟气脱硫塔结构有限元分析[J].中北大学学报(自然科学版),2012(5):583-589.PAN S,ZHOU J B,GUO S F.Finite element analysis of flue gas desulfurization tower structure[J].Journal of North University of China(Natural Science Edition),2012(5):583-589.
[3]陈小刚,张洪林,李长波.烟气脱硫塔主体结构的定性优化设计[J].石油化工高等学校学报,2010(2):67-71.CHEN X G,ZHANG H L,LI C B.The qualitative optimization design of the main structure of flue gas desulfurization tower[J].Journal of Petrochemical Universities,2010(2):67-71.
[4]解咏平,宋雪琳,柳丽霞,等.混凝土抗拉强度的试验研究[J].铁道建筑,2008(7):117-119.XIE Y P,SONG X L,LIU L X,et al.Experimental study on tensile strength of concrete[J].Railway Construction,2008(7):117-119.
[5]杨建华,马玉岩,卢文波,等.高烟囱爆破拆除倾倒折断力学分析[J].岩土力学,2011(2):459-464.YANG J H,MA Y Y,LU W B,et al.Analysis of fracture mechanics for falling tall chimneys during demolition blasting[J].Rock and Soil Mechanics,2011(2):459-464.
[6]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 C,LIU Y J.Calculation of blasting cutout range of blasting demolition brick chimney[J].Engineering Blasting,1999,5(2):1-4.
[7]郑炳旭,魏晓林,陈庆寿.钢筋混凝土高烟囱爆破切口支撑部破坏观测研究[J].岩石力学与工程学报,2006(S2):3 513-3 517.ZHENG B X,WEI X L,CHEN Q S.Study on damage surveying of cutting-support of high reinforced concrete chimney demolished by blasting[J].Chinese Journal of Rock Mechanics and Engineering,2006(S2):3 513-3 517.
[8]邬喆华,楼文娟,唐锦春,等.薄壁混凝土墙体稳定性分析[J].浙江大学学报(工学版),2002,36(4):361-365.WU Z H,LOU W J,TANG J C,et al.Stability analysis of thin wall concrete wall[J].Journal of Zhejiang University(Engineering Edition),2002,36(4):361-365.
[9]言志信,叶振辉,刘培林,等.钢筋混凝土高烟囱定向爆破拆除倒塌过程研究[J].振动与冲击,2011(9):197-201.YAN Z X,YE Z H,LIU P L,et al.Collapsing process of high reinforced concrete chimney in blasting demolition[J].Journal of Vibration and Shock,2011(9):197-201.
[10]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):183-186,198.CHU H B,XU P F,YE H Y,et al.Collapse process and load-bearing process of high reinforced concrete chimney during blasting demolition[J].Journal of Vibration and Shock,2015,34(22):183-186,198.
[11]苏浩然.框架结构楼房内爆法爆破拆除数值模拟研究[J].工程建设与设计,2016(10):30-31.SU H R.Numerical simulation research on blasting demolition of a frame structure building[J]Engineering Construction and Design,2016(10):30-31.
[12]UENISHI K,TAKAHASHI H,YAMACHI H,et al.PC-based simulations of blasting demolition of RC structures[J].Construction and Building Materials,2010(6):1-10.