西渝高速铁路沿线断层大地电磁勘探研究  

A Study on Magnetotelluric Prospecting for Faults along Xi’anChongqing High-speed Railway

作　　者：周超[1] 赵思为[1] 赵文龙 方力 ZHOU Chao;ZHAO Siwei;ZHAO Wenlong;FANG Li(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《高速铁路技术》2023年第1期97-101,共5页High Speed Railway Technology

摘　　要：本文介绍了音频大地电磁测深法(AMT)的原理以及常用的4种AMT仪器的性能和特点,阐述了AMT野外和室内的工作方法,以西渝高速铁路的复杂地质地形条件为背景,采用4种AMT仪器对不同地质条件下的断层进行勘探,验证了AMT法在复杂地质地形条件的断层勘探上的有效性;通过分析4种仪器对于断层勘探的电阻率反映的区别,总结了4种AMT仪器在断层勘探中的特点。研究成果为类似铁路隧道物探断层勘探工作提供了参考。This paper introduces the principle of audio magnetotellurics(AMT) and the performance and characteristics of four commonly used AMT instruments,expounds on the field and office working methods of AMT.Then,taking Xia’n-Chongqing High-speed Railway with complex geological and topographic conditions as a case,four AMT instruments were used to explore faults under different geological conditions,to verify the validity of the AMT method in fault prospecting under complex geological and topographical conditions.By analyzing the difference between the four AMT instruments in the resistivity reflection of fault prospecting,their characteristics in fault prospecting were summarized.The results provide a reference for prospecting the geophysical fault of similar railway tunnels.

关 键 词：西渝高速铁路 音频大地电法 断层破碎带 铁路隧道 

分 类 号：U452.1[建筑科学—桥梁与隧道工程]