TGP在大坪山隧道地质预报中的应用效果分析
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摘要
大坪山隧道是谷竹高速公路的一座特长隧道,穿越区域性的青峰断裂带,且地质构造复杂、断层破碎带多,进行超前地质预报是隧道安全施工的重要保障。本文介绍了TGP超前地质预报系统的基本原理和主要技术优势,并通过实例分析了TGP在大坪山隧道不同地层中的预测效果。结果表明:软岩中尤其是在没有大规模不良地质体的岩层中,TGP的探测结果与实际情况稍有出入;但在断层破碎带等与围岩介质波阻抗差别较大的不良地质体的岩层中,TGP的预测结果比较准确。同时,指出TGP作为一种物探手段,应在地质调查分析的基础上,结合其他技术手段,以提高地质预报的效果。
Dapingshan Tunnel is a big and long tunnel of Gucheng-Zhuxi Highway in Hubei Province;it goes across Qingfeng fault,where the geological structure is complex and the rock is fragmented.For the purpose of ensuring the construction safety and decreasing geological hazards in the construction process,the advanced prediction approaches based on TGP are applied.First of all,this paper introduces the basic principles of TGP system,and then it analyzes the flexibility issues in the application of TGP system to different lithology strata by the basic principles and practical examples.The results show that the forecast result of TGP is not very accurate in soft rock,especially that without the large adverse geological body;the forecast result is more accurate in the large adverse geological body,whose difference of medium wave impedance is large,such as fault fracture zone.For TGP,as a geophysical means,its application should be on the basis of the analysis of geological survey and in conjunction with other technical means so as to improve the geological prediction effect.
Dapingshan Tunnel is a big and long tunnel of Gucheng-Zhuxi Highway in Hubei Province;it goes across Qingfeng fault,where the geological structure is complex and the rock is fragmented.For the purpose of ensuring the construction safety and decreasing geological hazards in the construction process,the advanced prediction approaches based on TGP are applied.First of all,this paper introduces the basic principles of TGP system,and then it analyzes the flexibility issues in the application of TGP system to different lithology strata by the basic principles and practical examples.The results show that the forecast result of TGP is not very accurate in soft rock,especially that without the large adverse geological body;the forecast result is more accurate in the large adverse geological body,whose difference of medium wave impedance is large,such as fault fracture zone.For TGP,as a geophysical means,its application should be on the basis of the analysis of geological survey and in conjunction with other technical means so as to improve the geological prediction effect.
引文
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[8]房曰荣,沈斐敏.瑞雷波探测技术在公路隧道超前地质预报中的应用[J].安全与环境工程,2012,19(2):132-135.
[9]袁明生,陈建平,廖俊.TSP在软硬岩地层中的应用效果分析[J].西北地震学报,2008,30(2):155-158.
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[11]孙洋,陈建平.基于超前地质预报的隧道围岩动态分级预测方法探讨[J].安全与环境工程,2011,18(3):121-125.
[12]卢阳,胡修文,郭礼波,等.模糊综合评判法在隧道地质超前预报中的应用[J].安全与环境工程,2010,17(1):116-119.
[2]温树林,吴世林.TSP203在云南元磨高速公路隧道超前地质预报中的应用[J].地球物理学进展,2003,18(3):465-471.
[3]刘云桢.TGP隧道地震波预报系统与技术[J].物探与化探,2009,33(2):170-177.
[4]刘云桢,梅汝吾.TGP隧道地质超前预报技术的优势[J].隧道建设,2011,31(1):21-32.
[5]王齐仁,杨天春.隧道地质灾害超前预报的地震反射法[J].地球物理进展,2006,21(2):643-649.
[6]方向池,蔡学林.湖北青峰韧性剪切带研究[J].成都理工学院学报,1998,25(3):375-383.
[7]湖北省交通规划设计院.谷竹高速公路大坪山隧道施工图[R].武汉:湖北省交通规划设计院,2010.
[8]房曰荣,沈斐敏.瑞雷波探测技术在公路隧道超前地质预报中的应用[J].安全与环境工程,2012,19(2):132-135.
[9]袁明生,陈建平,廖俊.TSP在软硬岩地层中的应用效果分析[J].西北地震学报,2008,30(2):155-158.
[10]袁明生,陈建平,姚阳.地质法在隧道超前地质预报中的作用探讨[J].现代隧道技术,2008,45(5):78-81.
[11]孙洋,陈建平.基于超前地质预报的隧道围岩动态分级预测方法探讨[J].安全与环境工程,2011,18(3):121-125.
[12]卢阳,胡修文,郭礼波,等.模糊综合评判法在隧道地质超前预报中的应用[J].安全与环境工程,2010,17(1):116-119.
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