In order to solve the problems of"over-excavation"and"under-excavation"in the con-struction of high-speed railway tunnels,based on characteristics of the engineering geological condi-tions of a tunnel,the key and difficult technologies are first analyzed,and the working area is divid-ed according to the surrounding rock level.The corresponding tunnel construction technologies are proposed,including tunnel entrance engineering,tunnel lining,construction drainage,tunnel sup-port.In the process of tunnel construction,through in-depth analysis and research and based on the actual construction effect,the relevant parameters are dynamically adjusted,and good results are a-chieved in the construction of the tunnel.
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