电磁波CT技术在探测堤坝工程中的应用

Prospecting dam of using cross-section electromagnetic tomagrapic technique

应用电磁波CT探测技术对流溪河竹料段大堤和丰顺县虎局水库大坝渗水通道进行了探测研究。由于电磁波的吸收系数和地层结构有密切关系 ,因此 ,电磁波CT是通过能量的变化观测反演吸收系数的分布 ,进而推测地下构造的分布。利用电磁波的吸收系数为层析物理量 ,在钻孔中进行透射观测 ,以优于 0 5m的分辨率清楚地揭示了测区内渗水层位的分布情况。

Using cross-section electromagnetic tomagraphic technique in prospecting the tunnels of percolating water in Zhuliao dam of Lixi River and Huju pond of Fengshun County. Because there has the close relationship between the absorption coefficient of electromagnetic wave and structure of stratum, cross-section electromagnetic tomagraphic technique is used to inverse the absorption coefficient distribution through the observation of energy variation to infer the distribution of subsurface structure. Working with relation absorption coefficient of electromagnetic wave and arranging source and receivers between bore-holes, the investigation clearly shows the distribution of tunnels of percolating water with resolution less than 0.5m.