In the process of the tunnel construction in karst area, the existence of bad geological bodies often leads to larger hazard in safety, for this purpose, the geological radar was used to predict the abnormal geological conditions ahead. In this paper, analysis was made on the detection principle of the geologic radar and the geophysical response characteristics of the radar signals in Karst development area. The advance geological detection showed that the karst cavity exposed by actual excavation was consistent with the situation predicted by the radar.%在岩溶地区隧道工程的施工过程中,由于存在不良地质体,常给工程建设带来较大的安全隐患,为此采用地质雷达法来预测预报前方异常地质体情况. 分析了地质雷达探测原理、数据处理方法,以及雷达信号在岩溶发育区的地球物理响应特征,通过在隧道超前地质预报的探测应用,实际开挖揭露的溶洞与雷达预报的情况吻合.
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