隧道衬砌混凝土爆破振动能量传播规律试验
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摘要
针对隧道衬砌混凝土频繁爆破振动危害累积效应,设计混凝土频繁爆破振动试验,对测得的爆破振动信号进行总能量和频带能量计算与分析。试验结果表明:①爆破振动信号能量分布范围较广;但绝大部分能量集中在0～205. 08 Hz;且多以9. 77～58. 59 Hz频带能量较大;②总能量随距离的增大而减小,在近区衰减迅速,中远区较近区衰减缓慢;而能量随着距离的增大向低频带集中,且距离越大越明显;③总能量随爆破次数增加呈降低趋势,其中近区测点的总能量在大值范围内下降;而中远区衰减较为平缓。能量集中频带随爆破次数增加总体向中低频段发展;且近区测点在低频段能量所占比例有所增加。
Under frequent blasting,there is the cumulative effect of vibration hazard for the tunnel lining concrete. Therefore,frequent blasting vibration test was designed for the lining concrete in laboratory. The total energy and frequency band energy of the blasting vibration signals were caculated and analyzed. The results showed that:blasting vibration signals had a wide range of energy distribution,but most of the energy was concentrated in 0 ～205. 08 Hz,and the maximum energy was in 9. 77 ～ 58. 59 Hz. The total energy decreased with the increase of distance,rapidly in the near region and slowly in the middle and far region. The energy concentrated in the low frequency band,and the greater the distance was,the more obvious. The total energy decreased with the increase of blasting times,and the total energy of near-field points decreased in a large range,the attenuation of far-field points was more gentle. With the increase of blasting times,the energy concentrated frequency band was generally in the middle and low frequency bands,and the proportion of the low frequency band in the near-field points had increased to a certain extent.
Under frequent blasting,there is the cumulative effect of vibration hazard for the tunnel lining concrete. Therefore,frequent blasting vibration test was designed for the lining concrete in laboratory. The total energy and frequency band energy of the blasting vibration signals were caculated and analyzed. The results showed that:blasting vibration signals had a wide range of energy distribution,but most of the energy was concentrated in 0 ～205. 08 Hz,and the maximum energy was in 9. 77 ～ 58. 59 Hz. The total energy decreased with the increase of distance,rapidly in the near region and slowly in the middle and far region. The energy concentrated in the low frequency band,and the greater the distance was,the more obvious. The total energy decreased with the increase of blasting times,and the total energy of near-field points decreased in a large range,the attenuation of far-field points was more gentle. With the increase of blasting times,the energy concentrated frequency band was generally in the middle and low frequency bands,and the proportion of the low frequency band in the near-field points had increased to a certain extent.
引文
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6严鹏,卢文波,罗忆,等.基于小波变换时---能密度分析的爆破开挖过程中地应力动态卸载振动到达时刻识别[J].岩石力学与工程学报,2009,28(增刊1):2836-2844Yan Peng,Lu Wenbo,Luo Yi,et al.Identification of arriving time of vibration induced by geostress dynamic unloading during blasting-excavation employing method of time-energy analysis based on wavelet transform[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(S1):2836-2844
7凌同华,李夕兵.地下工程爆破振动信号能量分布特征的小波包分析[J].爆炸与冲击,2004,24(1):63-68Ling Tonghua,Li Xibing.The features of energy distribution for blast vibration signals in underground engineering by wavelet packet analysis[J].Explosion and Shock Waves,2004,24(1):63-68
8徐长发,李国宽.实用小波方法[M].3版.武汉:华中科技大学出版社,2009:54-58Xu Changfa,Li Guokuan.Practical wavelet method[M].3rd ed.Wuhan:Huazhong University of Science and Technology Press,2009:54-58
9胡昌华,周涛.基于MATLAB的系统分析与设计---小波分析[M].3版.西安:西安电子科技大学出版社,2008:63-79Hu Changhua,Zhou Tao.System analysis and design based on MAT-LAB:wavelet analysis[M].3rd ed.Xi'an:Xidian University Press,2008:63-79
10叶红宇,卓越,杨小林.隧道爆破振动信号EEMD分解后小波包降噪法研究[J].铁道建筑,2018,58(7):83-86Ye Hongyu,Zhuo Yue,Yang Xiaolin.Research on wavelet packet denoising of tunnel blasting vibration signals after EEMD decomposition[J].Railway Engineering,2018,58(7):83-86
11杨建华,卢文波,严鹏,等.全断面开挖爆破产生的自由面对振动频率的影响研究[J].振动与冲击,2016,35(7):192-197Yang Jianhua,Lu Wenbo,Yan Peng,et al.Influences of blast-created free surfaces on blasting vibration frequencies during full-face excavation[J].Journal of Vibration and Shock,2016,35(7):192-197
12周俊汝,卢文波,张乐,等.爆破地震波传播过程的振动频率衰减规律研究[J].岩石力学与工程学报,2014,33(11):2171-2178Zhou Junru,Lu Wenbo,Zhang Le,et al.Attenuation of vibration frequency during propagation of blasting seismic wave[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(11):2171-2178
13凌同华,李夕兵.单段爆破振动信号频带能量分布特征的小波包分析[J].振动与冲击,2007,26(5):41-43,151-152Ling Tonghua,Li Xibing.Features of energy distribution of single deck blast vibration signals with wavelet packet analysis[J].Journal of Vibration and Shock,2007,26(5):41-43,151-152
2杨建华,卢文波,胡英国,等.隧洞开挖重复爆炸荷载作用下围岩累积损伤特性[J].岩土力学,2014,35(2):511-518Yang Jianhua,Lu Wenbo,Hu Yingguo,et al.Accumulated damage in surrounding rocks due to repeated blasting loads during blasting excavation of tunnels[J].Rock and Soil Mechanics,2014,35(2):511-518
3闫长斌,王贵军,王泉伟,等.岩体爆破累积损伤效应与动力失稳机制研究[M].郑州:黄河水利出版社,2011:2-28Yan Changbin,Wang Guijun,Wang Quanwei,et al.Research on the cumulative blasting damage effect and dynamic instability of rock[M].Zhengzhou:The Yellow River Water Conservancy Press,2011:2-28
4叶红宇.混凝土爆破损伤累积和振动传播规律试验研究[D].焦作:河南理工大学,2016:3-11Ye Hongyu.Experimental studies on the blasting damage accumulation and vibration propagation regularity of the concrete[D].Jiaozuo:Henan Polytechnic University,2016:3-11
5娄建武,龙源,徐全军.小波分析在结构爆破振动响应能量分析法中的应用[J].世界地震工程,2001,17(1):64-68Lou Jianwu,Long Yuan,Xu Quanjun.Study on the wavelet analysis applied in structure response to blasting vibration[J].World Information on Earthquake Engineering,2001,17(1):64-68
6严鹏,卢文波,罗忆,等.基于小波变换时---能密度分析的爆破开挖过程中地应力动态卸载振动到达时刻识别[J].岩石力学与工程学报,2009,28(增刊1):2836-2844Yan Peng,Lu Wenbo,Luo Yi,et al.Identification of arriving time of vibration induced by geostress dynamic unloading during blasting-excavation employing method of time-energy analysis based on wavelet transform[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(S1):2836-2844
7凌同华,李夕兵.地下工程爆破振动信号能量分布特征的小波包分析[J].爆炸与冲击,2004,24(1):63-68Ling Tonghua,Li Xibing.The features of energy distribution for blast vibration signals in underground engineering by wavelet packet analysis[J].Explosion and Shock Waves,2004,24(1):63-68
8徐长发,李国宽.实用小波方法[M].3版.武汉:华中科技大学出版社,2009:54-58Xu Changfa,Li Guokuan.Practical wavelet method[M].3rd ed.Wuhan:Huazhong University of Science and Technology Press,2009:54-58
9胡昌华,周涛.基于MATLAB的系统分析与设计---小波分析[M].3版.西安:西安电子科技大学出版社,2008:63-79Hu Changhua,Zhou Tao.System analysis and design based on MAT-LAB:wavelet analysis[M].3rd ed.Xi'an:Xidian University Press,2008:63-79
10叶红宇,卓越,杨小林.隧道爆破振动信号EEMD分解后小波包降噪法研究[J].铁道建筑,2018,58(7):83-86Ye Hongyu,Zhuo Yue,Yang Xiaolin.Research on wavelet packet denoising of tunnel blasting vibration signals after EEMD decomposition[J].Railway Engineering,2018,58(7):83-86
11杨建华,卢文波,严鹏,等.全断面开挖爆破产生的自由面对振动频率的影响研究[J].振动与冲击,2016,35(7):192-197Yang Jianhua,Lu Wenbo,Yan Peng,et al.Influences of blast-created free surfaces on blasting vibration frequencies during full-face excavation[J].Journal of Vibration and Shock,2016,35(7):192-197
12周俊汝,卢文波,张乐,等.爆破地震波传播过程的振动频率衰减规律研究[J].岩石力学与工程学报,2014,33(11):2171-2178Zhou Junru,Lu Wenbo,Zhang Le,et al.Attenuation of vibration frequency during propagation of blasting seismic wave[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(11):2171-2178
13凌同华,李夕兵.单段爆破振动信号频带能量分布特征的小波包分析[J].振动与冲击,2007,26(5):41-43,151-152Ling Tonghua,Li Xibing.Features of energy distribution of single deck blast vibration signals with wavelet packet analysis[J].Journal of Vibration and Shock,2007,26(5):41-43,151-152
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