Key Techniques for Construction of the Taiyue Mountain Tunnel

The Taiyue Mountain tunnel, with a total length of 16 km, passes through multiple faults in water-rich sections characterized by large water inflow, high water pressure and fractured zones, and is characterized by a surrounding rock formation that is mainly horizontal sand shale interbed with certain expansibility. Considering the complicated geological conditions and construction difficulties encountered at the Taiyue Mountain, relevant key techniques for tunnel construction were optimized and improved with respect to the bench method, the drill&blast method, ventilation and drainage, and these improvements accelerated the construction speed and ensured highquality and efficient tunnel construction.