地铁隧道掘进爆破地表震动效应研究
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摘要
以武汉地铁二号线隧道工程为背景,对爆破振动强度进行实时监测,并结合数值模拟软件计算,研究掌子面前后方地表振动特性及变化规律。结果表明:用萨道夫斯基公式对隧道掘进前方地表振速进行拟合时,相关性较好,而隧道掘进后方地表振速拟合的相关性较差。数值计算所获得的地表峰值振速变化规律及特征与现场实测结果基本一致,成形隧道对岩体整体结构的改变导致地表振速产生放大效应,使得掌子面后方已开挖区地表振速比掌子面前方相应点的振速大,因此,在确定隧道掘进爆破施工方案时,必须考虑到隧道地表振速的这种放大效应,否则很可能危及掌子面后方地表建筑物的安全。
Taking the project of Wuhan metro 2nd Line as the background,the blasting vibration intensity was real-time monitored and combined with the calculation of numerical simulation software.The studies are carried out on the characteristics of surface vibration and attenuation law in front and back of the tunnel face.The results demonstrate that there is a good correlation when the surface vibrating velocity along the tunneling direction is fitted by Sadaovsk formular,whereas the fitting correlation is poor in the opposite direction,the characteristics and attenuation law of surface peak partical velocity in numerical simulation agree well with that in the spot experimental monitoring.There is amplification effect of vibration velocity as the rock structure has been changed due to digged tunnel,so the surface vibrating velocity in back of the tunnel face which has been excavated is larger than that in front,therefore,the amplification effect of surface vibrating velocity in the tunnel must be taken into account when the choice of blasting scheme will be determined,otherwise it is likely to endanger the safety of ground surface buildings which is in back of the tunnel face.
Taking the project of Wuhan metro 2nd Line as the background,the blasting vibration intensity was real-time monitored and combined with the calculation of numerical simulation software.The studies are carried out on the characteristics of surface vibration and attenuation law in front and back of the tunnel face.The results demonstrate that there is a good correlation when the surface vibrating velocity along the tunneling direction is fitted by Sadaovsk formular,whereas the fitting correlation is poor in the opposite direction,the characteristics and attenuation law of surface peak partical velocity in numerical simulation agree well with that in the spot experimental monitoring.There is amplification effect of vibration velocity as the rock structure has been changed due to digged tunnel,so the surface vibrating velocity in back of the tunnel face which has been excavated is larger than that in front,therefore,the amplification effect of surface vibrating velocity in the tunnel must be taken into account when the choice of blasting scheme will be determined,otherwise it is likely to endanger the safety of ground surface buildings which is in back of the tunnel face.
引文
[1]卢文波,赖世骧,朱传云,等.三峡工程岩石基础开挖爆破震动控制安全标准[J].爆炸与冲击,2001,21(1):67-71.
[2]房泽法,李恒勇,阳德伟,等.地铁开挖爆破参数优化及爆破震动测试分析[J].武汉理工大学学报,2010,32(21):56-59.
[3]吴德伦,叶晓明.工程爆破安全振动速度综合研究[J].岩石力学与工程学报,1997,16(3):266-273.
[4]李玉民,倪芝芳.地下工程开挖爆破的地面振动特征[J].岩石力学与工程学报,1997,16(3):274-278.
[5]陈寿如.两种质点振速预测公式的比较选择[C]//第七届全国工程爆破学术会议论文集.乌鲁木齐:新疆青少年出版社,2001:702-706.
[6]肖文芳.地铁隧道掘进爆破振动测试与数值模拟研究[D].武汉:武汉理工大学,2011.
[7]国胜兵,潘越峰,高培正,等.爆炸地震波模拟研究[J].爆炸与冲击,2005,25(4):335-340.
[8]Wu Chengqing,Lu Yong,Hao Hong.Numerical Prediction of Blast-induced Stress Wave from Large-scale UndergroundExplosion[J].International Journal for Numerical and Analytical Methods in Geomechanics,2003,28(1):93-105.
[9]谢和平,彭瑞东,鞠杨.岩石变形破坏过程中的能量耗散分析[J].岩石力学与工程学报,2004,23(21):365-370.
[10]龙源,冯长根,徐全军,等.爆破地震波在岩石介质中传播特性与数值计算研究[J].工程爆破,2000,6(3):2-7.
[11]于川,李良忠,黄毅民.含铝炸药爆轰产物JWL状态方程研究[J].爆炸与冲击,1999,19(3):74-79.
[12]陈朗,冯长根,黄毅民.含铝炸药圆筒试验及爆轰产物JWL状态方程研究[J].炸药学报,2001(2):13-19.
[2]房泽法,李恒勇,阳德伟,等.地铁开挖爆破参数优化及爆破震动测试分析[J].武汉理工大学学报,2010,32(21):56-59.
[3]吴德伦,叶晓明.工程爆破安全振动速度综合研究[J].岩石力学与工程学报,1997,16(3):266-273.
[4]李玉民,倪芝芳.地下工程开挖爆破的地面振动特征[J].岩石力学与工程学报,1997,16(3):274-278.
[5]陈寿如.两种质点振速预测公式的比较选择[C]//第七届全国工程爆破学术会议论文集.乌鲁木齐:新疆青少年出版社,2001:702-706.
[6]肖文芳.地铁隧道掘进爆破振动测试与数值模拟研究[D].武汉:武汉理工大学,2011.
[7]国胜兵,潘越峰,高培正,等.爆炸地震波模拟研究[J].爆炸与冲击,2005,25(4):335-340.
[8]Wu Chengqing,Lu Yong,Hao Hong.Numerical Prediction of Blast-induced Stress Wave from Large-scale UndergroundExplosion[J].International Journal for Numerical and Analytical Methods in Geomechanics,2003,28(1):93-105.
[9]谢和平,彭瑞东,鞠杨.岩石变形破坏过程中的能量耗散分析[J].岩石力学与工程学报,2004,23(21):365-370.
[10]龙源,冯长根,徐全军,等.爆破地震波在岩石介质中传播特性与数值计算研究[J].工程爆破,2000,6(3):2-7.
[11]于川,李良忠,黄毅民.含铝炸药爆轰产物JWL状态方程研究[J].爆炸与冲击,1999,19(3):74-79.
[12]陈朗,冯长根,黄毅民.含铝炸药圆筒试验及爆轰产物JWL状态方程研究[J].炸药学报,2001(2):13-19.
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