Safety Control of Ultra-Shallow Buried Underground Excavation Large-Span Rich Water Tunnel Construction

To solve the construction safety problem of ultra-buried and large-span rich water tunnels, and in combination with the entity project of the Manchuanguan ultra-buried and large-span rich water tunnel, a construction safety analysis of ultra-buried and large-span rich water tunnels is carried out using FLAC3D software. The construction method and safety measures for the shallow buried underground excavation rich water tunnel are put forward, which can solve such key problems as construction method, drainage, drilling and blasting of the ultra-shallow buried underground excavation large-span rich water tunnel. The on-site monitoring results show that the construction methods and safety measures adopted are feasible, and have important engineering application value.