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针对隧道岩溶的发育特点,提出了“隧道岩溶病害危险性分区”概念,并应用于超前地质预报工作中;根据中导洞开挖揭露的地质条件,对隧道岩溶病害危险性分区进行了修正,以指导主洞的超前预报工作,从而提高了预报工作的针对性并突出了重点;同时,基于高密度电法对不同介质电阻率的敏感性,在预报方法上将地表高密度电法与洞内地质雷达法相结合,提高了对重大岩溶病害预报的准确性。实际开挖结果显示:超前地质预报结果与实际情况高度吻合。
According to the development characteristics of tunnel karst, the concept of “zoning of tunnel karst disease” was put forward and applied to advanced geologic forecasting work. Based on the geological conditions revealed by tunnel excavation, the risk zoning of tunnel karst diseases was corrected So as to guide the advance prediction work of the main tunnel, thereby improving the pertinence of the forecasting work and highlighting the key points. Meanwhile, based on the sensitivity of the high-density electrical method to the resistivity of different media, The combination of geological radar in the cave improves the accuracy of prediction of major karst diseases. The actual excavation results show that the results of advanced geological prediction are in good agreement with the actual situation.