【作者】 安志国； 黄兆辉； 底青云； 王光杰；

【Author】 AN Zhiguo~①HUANG Zhaohui~②DI Qingyun~①WANG Guangjie~①(①Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029)(②Chongqing University of Science and Technology,Chongqing 400042)

【机构】 中国科学院地质与地球物理研究所； 重庆科技学院；

【摘要】 在勘查深埋长隧道不良地质体的研究中,可控源音频大地电磁法(CSAMT)是比较有效的一种方法,但复杂地形区CSAMT法静态影响非常严重,对数据的静态校正好坏直接影响结果的效果。文章分析了国内外学者对于CSAMT法的静态校正研究成果,提出了运用EMAP法和全剖面曲线比较相结合的静态校正方法,模型试验效果较佳。然后对西南某改建铁路资料进行了本文方法的静态校正处理。结合该区钻孔和相关的地质信息,对CSAMT结果进行了地质解释和验证,研究结果表明校正方法有效,CSAMT法在隧道岩性分析方面具有可行性,对于隧道施工有着一定的指导意义。更多还原

【Abstract】 In geophysical exploration work on bad geologic body of deep - long tunnel,controlled source audio frequency magnetotellurics method(CSAMT) is fairly effective one of detecting such bad geologic bodies.However, CSAMT data is affected badly by static effect in complex terrain,and whether the effect of static correction is good or not is crucial for interpretation results.Based on reviewing the relative references on static correction this paper presents a correction method of EMAP method combined with all profile comparison method.Then a case study has been carried out in one revised railway tunnel of southwestern China,and the result is well verified by boreholes and relative geologic information,which indicates that this corection method is effective in CSAMT data processing, and CSAMT method is feasible for analysis of rock property of tunnel line.Therefore CSAMT method is an instructive guide for tunnel digging.更多还原