| 音频大地电磁测深法在某隧道中的应用 |
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| 引用本文： | 周亚东,陈江平. 音频大地电磁测深法在某隧道中的应用[J]. 价值工程, 2014, 0(29): 116-118 |
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| 作者姓名： | 周亚东 陈江平 |
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| 作者单位： | 成都理工大学地球物理学院,成都,610059 |
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| 摘 要： | 本文主要讲述了音频大地电磁测深在某隧道的实际应用,从野外的施工到室内的数据处理和资料成图解释。依据音频大地电磁法(AMT)的带地形二维非线性共轭梯度(NLCG)反演结果,把电阻率异常分为Ⅴ类、Ⅳ类、Ⅲ类及Ⅱ类,分别对应极破碎岩体(Ⅴ级围岩)、破碎岩体(Ⅳ级围岩)、较破碎岩体(Ⅲ级围岩)和完整岩体(Ⅱ级围岩)。结合围岩分级结果,查明了隧道洞深附近岩性、断层破碎带及岩溶位置,对岩体完整性进行了评估。
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| 关 键 词： | 音频大地电磁 隧道 电阻率异常 围岩分级 |
Application of Audio-frequency Magnetotellurics in a Tunnel |
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| ZHOU Ya-dong,CHEN Jiang-ping. Application of Audio-frequency Magnetotellurics in a Tunnel[J]. Value Engineering, 2014, 0(29): 116-118 |
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| Authors: | ZHOU Ya-dong CHEN Jiang-ping |
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| Affiliation: | ( College of Geophysics, Chengdu University of Technology, Chengdu 610059, China ) |
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| Abstract: | This article mainly introduces the application of audio-frequency magnetotellurics in a tunnel, from wild construction to indoor data processing and data mapping. According to the inversion results of the topography based two-dimensional nonlinear conjugate gradient （NLCG） of audio-frequency magnetotelluric （AMT）, the resistivity anomaly is divided into ClassⅤ, Ⅳ,Ⅲ andII, corresponding to extremely broken rock mass （ClassⅤsurrounding rock）, fractured rock mass （ClassⅣsurrounding rock）, relatively broken rock mass （ClassⅢsurrounding rock ） and complete rock mass （ClassIIsurrounding rock）. In combination with the surrounding rock classification result, the tunnel nearby lithology, fault fracture zone and the karst location are found out, and the integrity of rock mass is evaluated. |
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| Keywords: | audio-frquency magnetotelluric tunnel resistivity anomaly classification of surrounding rock |
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