Research on the Application of Comprehensive Geophysical Methods in Tunnel Investigation

In the construction of highway tunnel engineering, it is of great significance to do a good job in the preliminary investigation. With the geological conditions of highway tunnel becoming more and more complex, it is difficult to meet the requirements of design and construction only by drilling and one geophysical method. The shallow buried section of the highway tunnel portal adopts a high-density electrical method and the deep buried section adopts the EH4 geophysical method. The survey work is based on geophysical exploration, combined with geological mapping and drilling, which can provide accurate geological data, effectively reduce geological diseases, reduce project cost and ensure the safety of traffic after operation. This method is worth using for reference.