Abstract:

Now the advanced detection by electrical resistivity method can’t get good result, and the theoretical research lags obviously behind the practice. Therefore, systematic study on forward modeling of advanced detection is carried out. First, forward modeling is taken for typical water-bearing structures such as fault using FEM, and the abnormal response characteristics are obtained. The key technology of interference recognition and removal is proposed that provides an effective method for useful information extraction. Second, the instrument and material for physical model test is studied, and beneficial exploration for advanced detection with electrical resistivity method is taken in laboratory scale. Results verify the effectiveness of the method. Finally, advanced detection work is taken in practical project, and qualitative judgment of water-bearing structure is realized. The application effect shows that the forward modeling provides important guide for engineering application. It also laid a solid foundation for 3D electrical resistivity inversion tomography and location of water-bearing structure.

Key words: tunnels and tunneling, water-bearing structure, geological prediction, electrical resistivity method, forward modeling, physical model test, engineering application