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为了检验高密度电法和瞬变电磁法在城市活断层探测中的有效性 ,在福州市区及周围进行了试验探测① ,文中主要介绍对八一水库尚干断裂的探测结果。八一水库尚干断裂是一条穿过福州市区的主要断裂带 ,其主断裂在八一水库测区位于一条由新店通往古城的水泥马路东侧 ,在横向上表现为东西宽几十米的电阻率低异常带 ,在纵向上从盖层底部向下延伸到基底深处。试验表明 ,高密度电法和瞬变电磁法可以互相补充和验证 ,从而提高整体探测效果。
In order to test the validity of high-density electric method and transient electromagnetic method in active fault detection in urban area, the test was carried out in and around Fuzhou City. The detection results of the Shang-Qian fault in Bayi Reservoir are mainly introduced in this paper. Shangyi Fault of Bayi Reservoir is a major fault zone passing through the urban area of Fuzhou. The main fault lies in the east side of the cement road leading from Xindian to the ancient city in the Bayi Reservoir Test Area, and displays horizontally several tens of meters Low resistivity low anomaly, extending longitudinally down from the bottom of the cap to the depths of the substrate. Experiments show that the high-density electric method and the transient electromagnetic method can complement each other and verify, so as to improve the overall detection effect.