CSAMT方法在铁路隧道勘探中的应用  

Application of CSAMT to Exploration of Railway Tunnel

作　　者：夏训银[1] 王身龙 王洪生[1] 严良俊[2] 吴丹[1] 

机构地区：[1]天津华北地质勘查局,天津市300181 [2]长江大学地球物理系,湖北荆州434023

出　　处：《勘察科学技术》2006年第4期61-64,共4页Site Investigation Science and Technology

摘　　要：襄渝二线老河口—安康段白石河隧道地形复杂,隧道埋深大,常规的物探方法难以开展。CSAMT法具有地形条件限制小,勘探深度大,观测效果好,兼有测深和剖面双重功能等特点,可较好地解决这个问题。该文介绍了CSAMT法的工作原理和野外施工方法,资料解释采用带地形的二维多参数联合反演,可较好地解决地形影响和静态效应。通过对CSAMT资料的分析,结合地质特征解释认为,高阻层主要为石英片岩;中阻层为云母片岩、炭质硅质岩;含炭质片岩为低阻层;陡倾的低阻异常为断裂破碎带。Due to complex terrain and depth tunnel in the Baishihe tunnel of the second Xiangyu railway line in the band of Laohekou - Ankang, it is difficult to use common geophysical prospecting while CSAMT can resolve the problem, because it enjoys less limited terrain conditions, great depth prospecting and exploration, high observation results, better sounding and profile research, etc. CSAMT＇s principles and operation methods in the field are introduced and CSAMT can resolve terrain influence and static state effect for adopting 2D multi-parameter combined inversion. Through analyzing data of CSAMT and interpreting geological characteristics it is known that quartz schist mainly deposits in high resistivity layer, glimmerite,carbenolite and silicolite mainly be found in middle resistivity layer, schist and carbon will be found in low resistivity layer and vertical low resistivity anomaly represents faulted zone.

关 键 词：CSAMT 电阻率 铁路隧道 二维反演 异常特征 

分 类 号：U452.1[建筑科学—桥梁与隧道工程]