隧洞开挖爆破地震反应谱特征研究
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摘要
利用地震工程中应用比较成熟的反应谱理论对隧洞开挖爆破地震进行研究.针对反应谱计算中必须输入加速度数据的问题.对实测爆破振动速度数据进行数值微分计算.并采用小波分析方法消噪得到准确、清晰的加速度时程曲线.继而将其用于反应谱计算。结合不同工程中大量的爆破振动监测资料.对隧洞开挖爆破地震反应谱进行分析。结果表明:隧洞开挖爆破地震反应谱都有一些共同的特征.反应谱曲线一般存在一个明显的峰值点.峰值对应的周期集中在几毫秒到几十毫秒的区间内。另外.在归纳、整理大量地下工程开挖爆破地震反应谱的基础上,得到了隧洞开挖爆破地震的设计反应谱。
The response spectrum theory widely applied in earthquake engineering was employed to in- vestigate blasting seismic waves induced by tunnel excavation.After numerical differential calculating for blasting vibration velocity data,an original acceleration wave curve involving with high-frequency noises was obtained.When the high-frequency noise was cleared up by wavelet transform,an accurate and clear blasting vibration acceleration curve was obtained.And then the acceleration data were used to calculate the response spectrum of blasting vibration.Response spectrum analysis of blasting vibra- tion induced by tunnel excavation was performed with a vast amount of monitoring data in diferent projects.The result shows that response spectrum of blasting vibration induced by tunnel excavation has some same charactors.Response spectrum curves generally have a distinct peak point.At the peak point,the period is less than 100 ms.In addition,based on coordinating and suming up a great deal of response spectrum curves induced by tunnel excavation,the design response spectrum curves were presented.This research can provide a guide for studying the blasting seismic effect.
The response spectrum theory widely applied in earthquake engineering was employed to in- vestigate blasting seismic waves induced by tunnel excavation.After numerical differential calculating for blasting vibration velocity data,an original acceleration wave curve involving with high-frequency noises was obtained.When the high-frequency noise was cleared up by wavelet transform,an accurate and clear blasting vibration acceleration curve was obtained.And then the acceleration data were used to calculate the response spectrum of blasting vibration.Response spectrum analysis of blasting vibra- tion induced by tunnel excavation was performed with a vast amount of monitoring data in diferent projects.The result shows that response spectrum of blasting vibration induced by tunnel excavation has some same charactors.Response spectrum curves generally have a distinct peak point.At the peak point,the period is less than 100 ms.In addition,based on coordinating and suming up a great deal of response spectrum curves induced by tunnel excavation,the design response spectrum curves were presented.This research can provide a guide for studying the blasting seismic effect.
引文
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[10]王凯．吴腾芳．季茂荣．微差爆破地震反应谱的研究[J]．爆破．1997．14(4)：1-6．WANG Kai.WU Teng-fang,JI Mao-rong.Research on and application of vibration response spectrum in milisec- ond blasting[J].Blasting,1997,14(4):1-6.
[11]丁刚德．王伟策，陈小波．微差爆破的爆破地震反应谱分析[J]．爆破，1997．14(3)：24-30．DING Gang-de,WANG Wei-ce,CHEN Xiao-bo.Analysis of blasting vibration response of short delay blasting [J].Blasting.1997,14(3):24-30.
[12]娄建武．龙源，方向，等．基于反应谱值分析的爆破震动破坏评估研究[J]．爆炸与冲击，2003，23(1)：41-46．LOU Jian-wu,LONG Yuan,FANG Xiang,et al.Study on blasting vibration damage based on response spectrum [J].Explosion and Shock Waves,2003,23(1):41-46.
[13]张雪亮，黄树棠．爆破地震效应[M]．北京：地震出版社，1981．
[14]李洪涛，卢文波，舒大强．小波分析在爆破振动加速度推求中的应用[J]．爆破器材．2006．35(5)：4-7．LI Hong-tao,LU Wen-bo,SHU Da-qiang.Application of wavelet analysis in calculating blasting vibration accel- eration [J].Explosive Materials.2006.35(5):4-7.
[15]霍永基，王湘钧．费骥鸣．爆破地震效应及安全评定方法探讨[C]//土岩爆破文集(第二辑)．北京：冶金工业出版社．1985：260-270．
[2]Gupta A D,Gregory F H,Bitting R L,et al.Dynamic analysis of an explosively loaded hinged rectangular plate [J].Computers & Structures,1987,26(1-2):339-344.
[3]Houlston R,Slater J E,Pegg N.On analysis of structural response of ship panels subjected to air blasting loading [J].Computer & Structure,1985,21(1-2):273-289.
[4]Turkmen H S.Structural response of laminated composite shells subjected to blast loading:comparison of experi- mental and theoretical methods[J].Journal of Sound and Vibration,2002,249(4):663-678.
[5]Hao H,Wu C Q.Numerical study of characteristics of underground blast induced surface ground motion and their effect on above-ground structures,PartⅡ:Effects on structural responses[J].Soil Dynamics and Earthquake En- gineering,2005,25 (1):39-53.
[6]Wu C Q,Hao H,Lu Y,et al.Numerical simulation of structural responses on a sand layer to blast induced ground exeitations[J].Computers & Structures,2004,82(9-10):799-814.
[7]何姣云，吴新霞．钱胜国．大坝爆破地震的动力响应计算[J]．爆破．2002．19(4)：1-3．HE Jiao-yun,WU Xin-xia,QIAN Sheng-guo.Calculation of dynamic response of seism in dam blasting[J].Blas- ting,2002,19(4):1-3.
[8]李夕兵，凌同华．爆炸参量对爆破地震反应谱的影响[J]．爆炸与冲击．2004．24(5)：443-447．LI Xi-bing,LING Tong-hua.Influence of explosion parameters on response spectrum for blast ground vibration [J].Explosion and Shock Waves,2004,24(5):443-447.
[9]李夕兵．凌同华．单段与多段微差爆破地震的反应谱特征分析[J]．岩石力学与工程学报．2005，24(15)：2 409-2 413．LI Xi-bing,LING Tong-hua.Response spectrum analysis of ground vibration induced by single deck and multi- deck blasting[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(15):2 409-2 413.
[10]王凯．吴腾芳．季茂荣．微差爆破地震反应谱的研究[J]．爆破．1997．14(4)：1-6．WANG Kai.WU Teng-fang,JI Mao-rong.Research on and application of vibration response spectrum in milisec- ond blasting[J].Blasting,1997,14(4):1-6.
[11]丁刚德．王伟策，陈小波．微差爆破的爆破地震反应谱分析[J]．爆破，1997．14(3)：24-30．DING Gang-de,WANG Wei-ce,CHEN Xiao-bo.Analysis of blasting vibration response of short delay blasting [J].Blasting.1997,14(3):24-30.
[12]娄建武．龙源，方向，等．基于反应谱值分析的爆破震动破坏评估研究[J]．爆炸与冲击，2003，23(1)：41-46．LOU Jian-wu,LONG Yuan,FANG Xiang,et al.Study on blasting vibration damage based on response spectrum [J].Explosion and Shock Waves,2003,23(1):41-46.
[13]张雪亮，黄树棠．爆破地震效应[M]．北京：地震出版社，1981．
[14]李洪涛，卢文波，舒大强．小波分析在爆破振动加速度推求中的应用[J]．爆破器材．2006．35(5)：4-7．LI Hong-tao,LU Wen-bo,SHU Da-qiang.Application of wavelet analysis in calculating blasting vibration accel- eration [J].Explosive Materials.2006.35(5):4-7.
[15]霍永基，王湘钧．费骥鸣．爆破地震效应及安全评定方法探讨[C]//土岩爆破文集(第二辑)．北京：冶金工业出版社．1985：260-270．
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