【摘要】 利用以可控源音频大地电磁法为主,甚低频法、部分地段激发极化法和瞬变电磁法为辅助手段对南水北调西线一期工程中20 km深埋长隧洞段进行了探测研究,主要介绍可控源音频大地电磁法法隧洞勘探的效果及其他几种辅助方法的作用。综合利用物探资料及地面工程地质勘察结果对深埋长隧洞围岩介质的结构特征进行解释,并评价可能影响工程的断层、破碎带及异常区,这将对工程施工提供非常有用的帮助信息。更多还原

【Abstract】 Geophysical exploration is conducted with controlled source audio magnetic telluric(CSAMT) method which is the main exploration method,VLF method,IP and TEM for some stations for the long deep-lying tunnel with a length of 20 km in west route of South-to-North Water Transfer Project.The exploration results with these four geophysical methods are introduced.According to the geophysical and engineering geological exploration results,the geological structure characteristics for the surrounding rock of the long deep-lying tunnel are interpreted;and the faults,fractures and some anomalies that may cause danger to the tunnel construction are explained.更多还原