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深大长隧道的地球物理宏观预测是当今工程界亟待解决的重大前沿课题。本文首先系统分析了深埋隧道宏观预测的现状,然后简要介绍高频大地电磁测深的基本理论及应用,通过对深埋隧道实例分析,提出采用EH—4电导率成像系统的高频大地电磁法能够准确快速的探测断裂构造、岩溶等不良地质构造,对施工区的地质构造和不良地质体的赋存状态进行超前的宏观预测。
The macro-prediction of deep and long tunnels is a major frontier project urgently needed to be solved in engineering today. This paper first systematically analyzes the status quo of macro-prediction of deep tunnel, and then briefly introduces the basic theory and application of high-frequency MTF. Based on the analysis of the example of deep tunnel, the EH-4 conductivity imaging system is proposed to use high-frequency MT The method can accurately and quickly detect fault structures, karst and other adverse geological formations and make macro-predictions ahead of the geological structure and bad geological bodies in the construction area.