小间距隧道爆破动力响应分析
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摘要
基于复线隧道施工爆破对既有隧道稳定性冲击问题,结合沪蓉线庙垭分岔隧道工程实例,研究了其小间距段施工爆破的振动监测方法、爆破动力特性及其减振控制技术。通过对隧道爆破围岩和衬砌质点振动速度波的频谱分析及其振速预测数学模型的改进研究,分析了隧道振速峰值纵向衰减规律、衬砌振速主频、横断面振速分布规律及爆破掌子面附近振动情况,并以小间距既有隧道中墙迎爆侧破坏为基准,从循环进尺、微振起爆、掏槽结构等方面提出了相邻隧道爆破减振技术措施。研究结论可为类似工程的爆破设计、施工及监测提供参考。
Based on the engineering background of the selected bifurcation tunnel,the monitoring way,dynamic behavior and controlling technology of blasting vibration wave induced by close-spaced tunnel excavation were studied for the bifurcation tunnel.By regression analysis of the testing data,a new revised mathematical model of spread of blasting seismic wave was established according to the blasting condition.Through the results of monitoring on blasting vibration,especially the testing data of the particle velocity wave and main frequency of concrete lining tunnel,the longitudinal attenuation of maximal vibration velocity,the dominating vibration frequency of lining,vibration velocity distribution of cross section and vibration near the excavation face were presented.In order to reduce the adjacent blasting vibration of rock masses of close-spaced tunnel,the vibration reduction measures of close-spaced tunnel based on middle rock wall were put forward from circle footage,millisecond vibration,undermine pattern and so on.The study will play an important role in guiding the excavation blasting construction of the tunnel project and assuring the safety of underground structure.
Based on the engineering background of the selected bifurcation tunnel,the monitoring way,dynamic behavior and controlling technology of blasting vibration wave induced by close-spaced tunnel excavation were studied for the bifurcation tunnel.By regression analysis of the testing data,a new revised mathematical model of spread of blasting seismic wave was established according to the blasting condition.Through the results of monitoring on blasting vibration,especially the testing data of the particle velocity wave and main frequency of concrete lining tunnel,the longitudinal attenuation of maximal vibration velocity,the dominating vibration frequency of lining,vibration velocity distribution of cross section and vibration near the excavation face were presented.In order to reduce the adjacent blasting vibration of rock masses of close-spaced tunnel,the vibration reduction measures of close-spaced tunnel based on middle rock wall were put forward from circle footage,millisecond vibration,undermine pattern and so on.The study will play an important role in guiding the excavation blasting construction of the tunnel project and assuring the safety of underground structure.
引文
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[11]张继春,彭琼芳.岩体爆破地震波衰减规律的现场实验研究[J].辽宁工程技术大学学报(自然科学版),2001,22(4):399-401.ZHANG Ji-chun,PENG Qiong-fang.Field Experiment and itsAnalysis of Attenuation Law for Seismic Waves Resulting fromRock Blasting[J].Journal of Liaoning Technical University(Natural Science),2001,22(4):399-401.
[12]谢全敏,夏元友,李新平.龙滩水电站蠕变边坡的爆破振动控制[J].岩石力学与工程学报,2003,22(11):1 929-1 930.XI Quan-min,XIA Yuan-you,LI Xin-ping.Study on BlastingVibration Control of Creep Mass Slope of Longtan HydropowerStation[J].Chinese Journal of Rock Mechanics and Engi-neering,2003,22(11):1 929-1 930.
[13]彭道富,李忠献,杨年华.近距离爆破对既有隧道的振动影响[J].中国铁道科学,2005,26(4):73-76.PENG Dao-fu,LI Zhong-xian,YANG Nian-hua.Vibration Ef-fect on the Working Tunnel Induced by an Adjacent Blasting[J].Chinese Railway Science,2005,26(4):73-76.
[14]SISKIND E D.Frequency Analysis and Use of Response Spectrafor Blast Vibration Assessments in Mining[C]//Proceeding ofthe 22ndAnnual Conference on Explosives and Blasting Tech-nique(volumeII).New Jersey USA:1996:176-183.
[15]张义平,李夕兵,赵国彦,等.爆破振动信号的时频分析[J].岩土工程学报,2005,27(12):1 472-1477.ZHANG Yi-ping,LI Xi-bing,ZHAO Guo-yan,et al.Time-frequency Analysis of Blasting Vibration Signals[J].ChineseJournal of Geotechnical Engineering,2005,27(12):1 472-1 477.
[16]阳生权,刘宝琛.小线间距施工隧道爆破地震影响下既有围岩线性动力分析[J].工程爆破,1998,4(1):1-6.YANG Sheng-quan,LIU Bao-chen.Linear Dynamic Analysison Rock-media of Old Tunnel Affected by Blasting Vibration ofNew Tunnel with Small Line-Clearance[J].EngineeringBlasting,1998,4(1):1-6.
[17]魏晓林.爆破振动对临近建筑物的危害影响[J].爆破,1998,15(1):48-54.WEI Xiao-lin.Study on Destructive Effect of Blasting NearBuilding[J].Blasting,1998,15(1):48-54.
[2]黄晓波,周立新,杨志夏,等.爆破碎石填料冲击压实处理试验研究[J].公路交通科技,2006,23(11):23-26.HUANG Xiao-bo,ZHOU Li-xin,YANG Zhi-xia,et al.TestStudy on Broken Stone Treatment by Impacting Compaction[J].Journal of Highway and Transportation Research and De-velopment,2006,23(11):23-26.
[3]许名标,彭德红.某水电站边坡开挖爆破振动动力响应有限元分析[J].岩土工程学报,2006,28(6):770-775.XU Ming-biao,PENG.De-hong.Finite Element Analysis ofDynamic Response on Blasting Vibration in Slope Excavation ofa Hydroelectric Power Station[J].Chinese Journal ofGeotechnical Engineering,2006,28(6):770-775.
[4]闫宝杰,王松根,陈荣生.路堑山体控制爆破技术的应用研究[J].公路交通科技,2005,22(11):65-67.YANG Bao-jie,WANG Song-gen,CHEN Rong-sheng.Appl-ication and Study of the Cutting Massif Controlled and Blown upTechnology[J].Journal of Highway and Transportation Re-search and Development,2005,22(11):65-67.
[5]李利平,李术才,张庆松,等.浅埋大跨隧道现场试验研究[J].岩石力学与工程学报,2007,26(增1):3 565-3 571.LI Li-ping,LI Shu-cai,ZHANG Qing-song,et al.In-situTesting Study on Shallow-buried Large-span Tunnel[J].Ch-inese Journal of Rock Mechanics and Engineering,2007,26(sup.1):3 563-3 571.
[6]汪稔,孟庆山,罗强,等.桥基岩溶洞穴顶板稳定性综合评价[J].公路交通科技,2005,22(6):76-80.WANG Ren,MENG Qing-shan,LUO Qiang,et al.TheComprehensive Evaluation on Roof Stability of Karst Cave Un-der Bridge Foundation[J].Jouranl of Highway and Transpor-tation Research and Development,2005,22(6):76-80.
[7]吴浩艺,刘慧,史雅语,等.临近侧向爆破作用下既有隧道减震问题分析[J].爆破,2002,19(2):74-76.WU Hao-yi,LIU Hui,SHI Ya-yu,et al.Analysis of the Vi-bration Reduction in Tunnel Contour Induced by Adjacent SideBlasting[J].Blasting,2002,19(2):74-76.
[8]李利平,李术才,张庆松,等.小间距隧道施工性态监测与稳定性分析[J].岩土力学,2006,27(增):4158-4 163.LI Li-ping,LI Shu-cai,ZHANG Qing-song,et al.Rock Sta-bility Analysis and Site Monitoring of Mechanical Behavior forExcavation of Closely Adjacent Tunnels[J].Rock and SoilMechanics,2006,27(sup.):4 158-4 163.
[9]阳生权,周健,李雪健.小净距公路隧道爆破振动观测与分析[J].工程爆破,2005,11(3):62-65.YANG Sheng-quan,ZHOU Jian,LI Xue-jian.Blasting Vibra-tion Analysis of little-space Road Tunnel[J].EngineeringBlasting,2005,11(3):62-65.
[10]张继春,曹孝君,郑爽英,等.浅埋隧道掘进爆破的地表振动效应实验研究[J].岩石力学与工程学报,2005,24(22):4 158-4 163.ZHANG Ji-chun,CAO Xiao-jun,ZHENG Shuang-ying,etal.Experimental Study on Vibration Effects of Ground due toShallow Tunnel Blasting[J].Chinese Journal of Rock Me-chanics and Engineering,2005,24(22):4 158-4 163.
[11]张继春,彭琼芳.岩体爆破地震波衰减规律的现场实验研究[J].辽宁工程技术大学学报(自然科学版),2001,22(4):399-401.ZHANG Ji-chun,PENG Qiong-fang.Field Experiment and itsAnalysis of Attenuation Law for Seismic Waves Resulting fromRock Blasting[J].Journal of Liaoning Technical University(Natural Science),2001,22(4):399-401.
[12]谢全敏,夏元友,李新平.龙滩水电站蠕变边坡的爆破振动控制[J].岩石力学与工程学报,2003,22(11):1 929-1 930.XI Quan-min,XIA Yuan-you,LI Xin-ping.Study on BlastingVibration Control of Creep Mass Slope of Longtan HydropowerStation[J].Chinese Journal of Rock Mechanics and Engi-neering,2003,22(11):1 929-1 930.
[13]彭道富,李忠献,杨年华.近距离爆破对既有隧道的振动影响[J].中国铁道科学,2005,26(4):73-76.PENG Dao-fu,LI Zhong-xian,YANG Nian-hua.Vibration Ef-fect on the Working Tunnel Induced by an Adjacent Blasting[J].Chinese Railway Science,2005,26(4):73-76.
[14]SISKIND E D.Frequency Analysis and Use of Response Spectrafor Blast Vibration Assessments in Mining[C]//Proceeding ofthe 22ndAnnual Conference on Explosives and Blasting Tech-nique(volumeII).New Jersey USA:1996:176-183.
[15]张义平,李夕兵,赵国彦,等.爆破振动信号的时频分析[J].岩土工程学报,2005,27(12):1 472-1477.ZHANG Yi-ping,LI Xi-bing,ZHAO Guo-yan,et al.Time-frequency Analysis of Blasting Vibration Signals[J].ChineseJournal of Geotechnical Engineering,2005,27(12):1 472-1 477.
[16]阳生权,刘宝琛.小线间距施工隧道爆破地震影响下既有围岩线性动力分析[J].工程爆破,1998,4(1):1-6.YANG Sheng-quan,LIU Bao-chen.Linear Dynamic Analysison Rock-media of Old Tunnel Affected by Blasting Vibration ofNew Tunnel with Small Line-Clearance[J].EngineeringBlasting,1998,4(1):1-6.
[17]魏晓林.爆破振动对临近建筑物的危害影响[J].爆破,1998,15(1):48-54.WEI Xiao-lin.Study on Destructive Effect of Blasting NearBuilding[J].Blasting,1998,15(1):48-54.
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