| 井间电磁波CT在昆明地铁岩溶区地质勘察中的应用 |
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| 引用本文： | 徐智勇,王俊,王时平.井间电磁波CT在昆明地铁岩溶区地质勘察中的应用[J].CT理论与应用研究,2018,27(5):617-626. |
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| 作者姓名： | 徐智勇 王俊 王时平 |
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| 作者单位： | 中国电建集团昆明勘测设计研究院有限公司, 昆明 650051 |
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| 摘 要： | 井间电磁波CT技术是利用地层间介质的物性差异，不同性质的物质对电磁波的反射和吸收能力是不同的。井间电磁波CT技术在探测岩溶裂缝等方面有较好效果，本文利用井间电磁波CT技术，对昆明地铁四号线苏家塘站岩溶专项线路工程地下岩溶发育地段进行测试，通过对工区岩石电磁波吸收系数差异的研究，依据吸收系数特征，探测到地铁线路工程地下岩溶及裂缝发育，划分出4个层次的岩溶区，经与钻孔岩心资料对比，证实探测结果的正确性。且对工程设计和施工提供了必要的基础资料。
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| 关 键 词： | 电磁波CT 吸收系数 地下岩溶 |
| 收稿时间： | 2018-03-08 |
Application of Cross-borehole Electromagnetic Computerized Tomography in Karst Detection along Kunming Subway |
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| Institution: | POWERCHINA Kunming Engineering Corporation Limited, Kunming 650051, China |
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| Abstract: | The cross-well electromagnetic wave CT technology is based on the difference of the physical properties between the media. Different materials have different reflective and absorbing abilities to electromagnetic waves. Interwell electromagnetic wave CT technology has a good effect in detecting Karst cracks and other aspects. In this paper, using interwell electromagnetic wave CT technology to tested the underground Karst development area of Sujiatang. Through studying the difference of rock electromagnetic wave absorption coefficient in the working area. Four layers of Karst development areas of underground were divided. The correctness of the detection results was verified by comparing with the core data of boreholes. The detection results provide necessary basic data for engineering design and construction. |
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