Abstract: To predict the geological structure and surrounding rock moisture in shield and tunnel boring machine(TBM) tunnels, experiments are conducted in a TBM waterdiversion tunnel. The arrangement of tunnel seismic tomography observation system under the segment structure is improved, and the advance geological prediction research experiment of the threedimensional seismic wave method is conducted for highrisk unfavorable geological bodies such as large faults. Then, the complex frequency conductivity method is improved combining the observation method with the seismic wave method, and a research experiment on the comprehensive prediction of the water content of the surrounding rock in front of the cutterhead is conducted. Taking the Elahera Canal in Sri Lanka, the San Gabán Ⅲ hydropower station in Peru, and the diversion tunnel of the Kaliwa dam in the Philippines as examples, the advance geological prediction technology is introduced. The research results show that the method has a good application effect in practice for soft and hard rock interbedding, large faults, and geological bodies with poor water structure.

Key words: tunnel boring machine, water diversion tunnel, bad geology, comprehensive advance geological prediction, advance water exploration, advance seismic wave detection, complex frequency conductivity; tunnel seismic tomography