As one of the main structures in traffic engineering construction,tunnels play a prominent role in shortening the distance of lines and improving operating conditions.However,China's topographic conditions are complex,and geological conditions such as strong structure influence,joint fissure development,extrusion and alteration are often encountered in the construction process,resulting in large deformation and cracking of the surrounding rock during the tunnel construction,which seriously affects the construction quality and safety.Therefore,it is necessary to grasp the geological conditions at the construction area in advance,control the area that is prone to large deformation by using scientific and reasonable excavation support means,and avoid the occurrence of large deformation and collapse of the surrounding rock of the tunnel due to the influence of geological conditions,which are the key to ensure the safety of tunnel construction.
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