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隧道施工期间的地质调查和超前地质预报工作对隧道施工起着十分重要的作用;因隧道选址阶段和设计阶段对岩体质量评价和围岩级别划分远不能满足施工要求。采用以地质分析法为基础,以TSP法、地质雷达法和地震波反射映像法三种方法为辅助手段的综合预报方法,对隧道的不良地质进行了预报分析,可准确得到开挖掌子面前方岩性变化和构造分布的详细地质信息。结果表明综合超前地质预报方法是一种有效的预报方法,各种手段相互补充验证,预报结果可以正确指导施工,从而确保隧道的施工安全。
The geological investigation and advanced geological forecasting during the construction of the tunnel plays an important role in the construction of the tunnel. Because of the rock mass quality evaluation and the classification of surrounding rock can not meet the construction requirements at the site selection and design stage of the tunnel. Based on the method of geoanalysis, three methods of TSP, GPR and seismic reflection mapping are used to predict the adverse geology of the tunnel, which can be used to predict the front of excavation face Lithology and tectonic distribution of detailed geological information. The results show that the comprehensive advanced geological forecasting method is an effective forecasting method, and various means complement each other. The forecasting results can guide the construction correctly and ensure the construction safety of the tunnel.