CT成像技术在芹菜垭隧道超前地质预报中的应用
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摘要
芹菜垭隧道是"柏火线"的关键工程,围岩节理发育,地质构造复杂,岩体破碎。施工中为减少和避免地质灾害发生,采用CT成像技术对隧道工程地质进行了超前预报。CT成像技术利用地震波走时资料反演地质体内部结构和吸收系数分布。探测结果表明:CT成像技术采用空间观测系统有效提高了速度分析精度和构造定位精度,成功地解决了芹菜垭隧道地质超前预报问题。
Qincaiya Tunnel is the key works of Baiguo-Huopu Road,where the surrourding rock joints are well developed,geological structure is complex,and rock is very fragmented.In order to avoid or decrease the geological hazard in construction,the advanced prediction technology of seismic tomography is applied.Using seismic travel-time,seimic tompgraphy is adopted to inverse the velocity structure of geology bodiese and the absorption coefficient distributing.The result shows that tunnel seimic tompgraphy can successfully predict the geological conditions.The spatial observation of seimic tompgraphy can effectively improve the precision of the velocity analysis and structure location.
Qincaiya Tunnel is the key works of Baiguo-Huopu Road,where the surrourding rock joints are well developed,geological structure is complex,and rock is very fragmented.In order to avoid or decrease the geological hazard in construction,the advanced prediction technology of seismic tomography is applied.Using seismic travel-time,seimic tompgraphy is adopted to inverse the velocity structure of geology bodiese and the absorption coefficient distributing.The result shows that tunnel seimic tompgraphy can successfully predict the geological conditions.The spatial observation of seimic tompgraphy can effectively improve the precision of the velocity analysis and structure location.
引文
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[7]龙浪波,王鹰.多种超前地质预报方法在某隧道施工的应用[J].施工技术,2008,37(11).Long Langbo,Wang Ying.Application of geology forecast methods in some tunnel construction[J].Construction Technology,2008,37(11).(in Chinese)
[2]王超凡,赵永贵,靳洪晓.地震CT及其在采空区探测中的应用[J].地球物理学报,1998,41(S):367-375.Wang Chaofan,Zhao Yonggui,Jin Hongxiao.Seismic tomography and its application to the investigation of buried worked-out area[J].Chinese Journal of Geophysics,1998,41(S):367-375.(in Chinese)
[3]姜云.公路隧道围岩大变形预测预报及对策研究[D].成都:成都理工大学,2004.Jiang Yun.The Study on the forecast and countermeasure of great distortion of highway tunnel wall rock[D].Chengdu:Chengdu University of Technology,2004.(in Chinese)
[4]赵永贵.中国工程地球物理研究的进展与未来[J].地球物理学进展,2002,17(2):301-304.Zhao Yonggui.The present situation and future of engineering geophysics in China[J].Progress in Geophysics,2002,17(2):301-304.(in Chinese)
[5]赵永贵.隧道围岩含水性预报技术[J].地球与环境,2005,33(3):29-35.Zhao Yonggui.Geological prediction technique for groundwater-containing potential of tunnel country rocks[J].Earth and Enviroment,2005,33(3):29-35.(in Chinese)
[6]郭伟伟.隧道施工超前地质预测预报综合技术方法研究[D].成都:西南交通大学,2006.Guo Weiwei.Research on integrated advanced geological prediction technology and method for tunnel construction[D].Chengdu:Southwest Jiaotong University,2006.(in Chinese)
[7]龙浪波,王鹰.多种超前地质预报方法在某隧道施工的应用[J].施工技术,2008,37(11).Long Langbo,Wang Ying.Application of geology forecast methods in some tunnel construction[J].Construction Technology,2008,37(11).(in Chinese)
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