Application Practice of Cantilever Tunnel Boring Machine in Airport Tunnel
In order to discuss the application of cantilever tunnel boring machine in tunnel construction,based on the actual project of Changshui Airport tunnel,the paper analyzes the application of cantilever tunnel boring machine in airport tunnel construction and the control points of key processes.It is concluded from practice that the hydrogeological conditions of airport tunnel engineering are complicated,the excavation construction is difficult,and there are many existing buildings around the construction site,the vibration and destructive power generated by conventional drilling and blasting construction technology are relatively large,and the disturbance and influence on the surrounding soil and existing buildings are relatively large,which is difficult to meet the requirements of airport tunnel construction.In view of this,in the construction of Changshui Airport tunnel,a more advanced cantilever tunnel boring machine is adopted.Compared with drilling and blasting technology,this tunnel construction technology has the characteristics of large one-time positioning and cutting width and height,reducing machine transfer time,strong rock breaking ability,etc.,which is very suitable for the requirements of airport tunnel construction,and can accelerate the construction speed.Moreover,it also has unique advantages in ensuring construction quality and safety,which is worth vigorously promoting in similar projects.
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