Research on the Application of Treatment Technology for High-speed Railway Tunnels Crossing Large Water Rich Karst Caves
Karst caves are one of the main construction difficulties faced by tunnel construction in mountainous areas,and due to the uncertainty and complexity of their development,they bring many unpredictable risks to builders.Based on this background,taking the Dafangshan Tunnel of the Guinan high-speed railway as the engineering support,the treatment technology of"beam+raft+composite lining"was studied for the high-speed railway tunnel passing through a large water rich karst cave.The effect is significant,effectively ensuring the safety of tunnel construction and operation.At the same time,through scientific and reasonable organizational methods,the construction nodes are ensured to be completed on schedule,which can provide reference for the construction of similar karst tunnels.
karst treatmentexpand excavation and detourmiddle rock pillarcross beamraft board
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