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Ground Penetrating Radar(GPR) is a high-frequency electromagnetic pulse technology, which is widely used in geological exploration. Within a short distance, the changes of formation in front of the tunnel face can be detected with high accuracy. It has a higher ability to identify broken fault zone, and its reliability and stability ofdetection results are high. As a result, Ground penetrating radar method has important significance in guiding tunnel construction. As for Liwanhighway Qiyueshan tunnel, the advanced geological prediction is carried out based on Ground penetrating radar method. The specific characteristics of GPR waves are analyzed and summarized. A number of geological disasters are forecasted successfully. The purpose is to illustrate the superiority of ground penetrating radar in the short advanced geological prediction of karst tunnels, which has some reference for similar karst tunnel projects in future. Keywordsground penetrating radar; Qiyueshan tunnel; advanced geological prediction; karst tunnels

Case study of Ground Penetrating Radar for geological prediction in Qiyueshan Tunnel