Dynamic Analysis of the Propulsion Process of Tunnel Boring Machines

Abstract

In order to improve the excavation efficiency, and consider the influence of the interference force generated by the propulsion system on the design and service life of key components, it is necessary to correct the trajectory of the tunnel boring machine when excavating curved tunnels. The mechanical model of tunnel boring machine propulsion system is established, and its dynamic characteristics are established by ADAMS software. By analysing the thrust force of hydraulic cylinder (1500KN) and the three steering angles of 0.5°, 1° and 2°, the change of the angle between the thrust hydraulic cylinder and the key components of the gripper shoe hydraulic cylinder is studied, and the relationship between the tightening force and the horizontal propulsion force of the gripper shoe hydraulic cylinder is also studied. The research reveals the difference of the changing laws of propulsive force and tighteningforce under different steering angles. The results are helpful to study the optimal matching relationship between mechanical model and driving parameters of TBM, and have important theoretical significance to further improve the driving efficiency and stability of TBM.