高密度电法在水底隧道工程勘察中的应用研究
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摘要
高密度电法在陆地上的应用已经相当成熟,在水域包括淡水水域和浅海水域中的应用相对较少。水域工程相对于陆域工程,勘察技术难度显而易见,作为一种成熟高效的物探方法,高密度电法在水域工程勘察中的应用值得研究。本文通过建立淡水水域和浅海水域地质模型,进行正反演计算分析,应用两个实例证实高密度电法在水底隧道勘察中的应用效果显著,特别是在水底地下低阻构造带、地层界线的划分、基岩面起伏情况勘察方面效果尤为突出,这对水底地下隧道施工提供了很好的支持。
High density resistivity method is used much fewer in water area comparing with the popularity in land.The engineering investigation is much difficult in water area than in land.As an effective and ripe geophysical exploration method,high density resistivity is worth studying in water engineering investigation.The geological models are established,including fresh water area and shallow sea area.Forward and inverse calculations are carried on.The calculation results and two cases show that high density resistivity method is outstanding in underwater tunnel investigation,especially in low resistance structure belt,formation boundary division and bedrock surface fluctuation and which will provide a good support to the tunnel construction in water area.
High density resistivity method is used much fewer in water area comparing with the popularity in land.The engineering investigation is much difficult in water area than in land.As an effective and ripe geophysical exploration method,high density resistivity is worth studying in water engineering investigation.The geological models are established,including fresh water area and shallow sea area.Forward and inverse calculations are carried on.The calculation results and two cases show that high density resistivity method is outstanding in underwater tunnel investigation,especially in low resistance structure belt,formation boundary division and bedrock surface fluctuation and which will provide a good support to the tunnel construction in water area.
引文
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[3]刘宏岳.地震反射波CDP叠加技术在海域花岗岩孤石探测中的应用[J].工程地球物理学报,2011,7(6):714～718.
[4]刘宏岳,林朝旭,林孝城等.综合物探方法在某过江隧道工程勘察中的应用研究[J].隧道建设,2012,32(3):275～280.
[5]祝杰,亢会明,杜毅等.水域高密度电法在工程地质勘察中的应用研究[J].勘察科学技术,2011,(2):60～61.
[6]祝杰,杜毅,亢会明等.高密度电法在水域工程勘察中的应用[J].工程勘察,2011,(10):80～83.
[7]石显新.瞬变电磁法勘探中的低阻层屏蔽问题研究[D].北京:煤炭科学研究总院,2005.
[8]何继善,鲍力知.海洋电磁法研究的现状和进展[J].地球物理学进展,1999,14(1):7～39.
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