公路隧道光面爆破围岩振动衰减规律
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摘要
为了获得隧道围岩在爆破荷载作用下的振动效应,运用有限元软件ADINA建立隧道计算模型,通过加载简化的三角形等效爆破荷载,模拟了青山隧道Ⅲ类围岩段在单循环进尺为2 m、2.5 m和3 m三种情况下的爆破振动效应,得到了隧道拱顶、拱脚和边墙部位围岩的振动衰减规律。计算结果表明:围岩质点的峰值振速随着与开挖轮廓面距离的增大先急剧衰减后平缓衰减,开挖进尺越大,围岩受到的扰动越大。最后通过满足规范的安全质点振动速度来确定三种开挖进尺条件下的最大段药量大小,为类似隧道钻爆设计的合理性提供参考。
In order to obtain vibration effect of tunnel surrounding rocks under blasting load,the tunnel calculation model was established by using the finite element software ADINA. Under simplified triangle equivalent blast loading,the blasting vibration effect of class Ⅲ surrounding rock section of Qingshan tunnel with the single footage driving cycle being 2 m,2. 5 m and 3 m was simulated. And then the vibration attenuation law for adjacent rocks at the arch vault,spring and side walls of the tunnel under blasting load action was obtained. As shown by the calculation results,the peak particle velocity showed abrupt attenuation first and then flat attenuation with the increase of excavation profile distance. The larger the footage,the more vibrations the rock was subject to. Lastly,safety particle vibration velocity in compliance with specifications was used to determine the maximum charge under these three excavation footage conditions. This study will provide reference to the rationality of blasting and drilling design of similar tunnels.
In order to obtain vibration effect of tunnel surrounding rocks under blasting load,the tunnel calculation model was established by using the finite element software ADINA. Under simplified triangle equivalent blast loading,the blasting vibration effect of class Ⅲ surrounding rock section of Qingshan tunnel with the single footage driving cycle being 2 m,2. 5 m and 3 m was simulated. And then the vibration attenuation law for adjacent rocks at the arch vault,spring and side walls of the tunnel under blasting load action was obtained. As shown by the calculation results,the peak particle velocity showed abrupt attenuation first and then flat attenuation with the increase of excavation profile distance. The larger the footage,the more vibrations the rock was subject to. Lastly,safety particle vibration velocity in compliance with specifications was used to determine the maximum charge under these three excavation footage conditions. This study will provide reference to the rationality of blasting and drilling design of similar tunnels.
引文
[1]荣耀.爆破荷载作用下隧道围岩中应力波传播的数值模拟[C]//盛世岁月——祝贺孙钧院士八秩华诞论文选集,2006.
[2]夏祥,李俊如,李海波,等.爆破荷载作用下岩体振动特征的数值模拟[J].岩土力学,2005,26(1):50-56.
[3]傅洪贤,赵勇,谢晋水,等.隧道爆破近区爆破振动测试研究[J].岩石力学与工程学报,2011,30(2):335-340.
[4]国家安全生产监督管理总局.GB6722-2011.爆破安全规程[S].北京:中国标准出版社,2011.
[5]单明岳.基于ADINA强柱弱梁框架结构地震动动力反应分析[D].唐山:河北联合大学,2012.
[6]翁磊.爆破振动对相邻隧道的动态响应[D].武汉:武汉理工大学,2012.
[7]柳锦春,还毅,李建权.人工边界及地震动输入在有限元软件中的实现[J].地下空间与工程学报,2011,7(2):1774-1779.
[8]马野,袁志丹,曹金凤,等.ADINA有限元经典实例分析[M].北京:机械工业出版社,2011.
[9]戴俊.柱状装药爆破的岩石压碎圈与裂隙圈计算[J].辽宁工程技术大学学报:自然科学版,2001,20(2):144-147.
[10]杨建华,卢文波,陈明,等.基于爆炸荷载等效施加方法的爆破振动全历程数值模拟研究[C]//第十届全国工程爆破学术会议.中国爆破新技术Ⅲ.广东广州,2012.
[11]赵以贤,王良国.爆炸荷载作用下地下拱形结构动态分析[J].爆炸与冲击,1995,15(3):201-211.
[12]许红涛,卢文波,周小恒.爆破震动场动力有限元模拟中爆破荷载的等效施加方法[J].武汉大学学报:工学版,2008,41(3):67-71.
[13]左双英,肖明,续建科,等.隧道爆破开挖围岩动力损伤效应数值模拟[J].岩土力学,2011,32(10):3171-3176.
[14]戴俊.岩石动力学特性与爆破理论(第2版)[M].北京:冶金工业出版社,2012.
[15]易长平.爆破振动对地下洞室的影响研究[D].武汉:武汉大学,2005.
[16]刘冬,高文学,钱文斐,等.隧洞洞口开挖爆破振动监测与减振技术[J].公路,2007,(12):218-221.
[2]夏祥,李俊如,李海波,等.爆破荷载作用下岩体振动特征的数值模拟[J].岩土力学,2005,26(1):50-56.
[3]傅洪贤,赵勇,谢晋水,等.隧道爆破近区爆破振动测试研究[J].岩石力学与工程学报,2011,30(2):335-340.
[4]国家安全生产监督管理总局.GB6722-2011.爆破安全规程[S].北京:中国标准出版社,2011.
[5]单明岳.基于ADINA强柱弱梁框架结构地震动动力反应分析[D].唐山:河北联合大学,2012.
[6]翁磊.爆破振动对相邻隧道的动态响应[D].武汉:武汉理工大学,2012.
[7]柳锦春,还毅,李建权.人工边界及地震动输入在有限元软件中的实现[J].地下空间与工程学报,2011,7(2):1774-1779.
[8]马野,袁志丹,曹金凤,等.ADINA有限元经典实例分析[M].北京:机械工业出版社,2011.
[9]戴俊.柱状装药爆破的岩石压碎圈与裂隙圈计算[J].辽宁工程技术大学学报:自然科学版,2001,20(2):144-147.
[10]杨建华,卢文波,陈明,等.基于爆炸荷载等效施加方法的爆破振动全历程数值模拟研究[C]//第十届全国工程爆破学术会议.中国爆破新技术Ⅲ.广东广州,2012.
[11]赵以贤,王良国.爆炸荷载作用下地下拱形结构动态分析[J].爆炸与冲击,1995,15(3):201-211.
[12]许红涛,卢文波,周小恒.爆破震动场动力有限元模拟中爆破荷载的等效施加方法[J].武汉大学学报:工学版,2008,41(3):67-71.
[13]左双英,肖明,续建科,等.隧道爆破开挖围岩动力损伤效应数值模拟[J].岩土力学,2011,32(10):3171-3176.
[14]戴俊.岩石动力学特性与爆破理论(第2版)[M].北京:冶金工业出版社,2012.
[15]易长平.爆破振动对地下洞室的影响研究[D].武汉:武汉大学,2005.
[16]刘冬,高文学,钱文斐,等.隧洞洞口开挖爆破振动监测与减振技术[J].公路,2007,(12):218-221.
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