摘要
电磁测深法原是用于地球物理勘探的，笔者将这一无损探测方法应用于土坝渗流通道的探测取得成功．其优点为操作简便、迅速、无需电极，测量一点需2min，位置分辨高，横向测站距离可任意设置；纵向深度分辨率可达3～6m，测深系统由发射部分和接收部分组成，发射部分包括发射线圈、发射机和电源；接收部分包括接收线圈、接收机．该仪器在山东省曲阜市尼山水库进行了大坝坝体、基岩、断层、地下河和山体的渗漏探测，其结果与多年人工观测结果相符合，并发现一些细部构造和以前未曾发现的漏水处．
ElectromagnetYic Sbunding is originally used in Geophysical prospecting. The authers successfully employed the NDT in detection of seepag in earth-fill dams and fundations. The advantages of this measure are easeshandling,no poles needed,fast operation (2 minfor one station),high position resolution,arbitrariness of station spacing,and 3~6m reso1lition in depth. The system is composed by emission part including emission coil.emitter and power suply,and receive part including receive coil.receiver and cQmputer data acquisition system,We used both Transient Electromagnetic Sounding(TEM) and Frequency domain Electromagnetic Sounding (FEM ) to detect seepane in embankment. fundation, fractures and hillside in Nishan reservior, Shandong province. the result of detection is well in coincidence with observaton and geological exploration. Some detail geologic structures and new seepage were found.
出处
《水利水电技术》
CSCD
北大核心
1998年第4期26-31,共6页
Water Resources and Hydropower Engineering
关键词
电磁测深
土坝
渗漏
探测
监测
Electromagnetric Sounding, Earth-Fill Dams, Seepage
