Analysis Of The Behavior Of Dot Tunnel Lining Caused By Rolling Correction Operation

摘要

One of the characteristics of the Double-O-Tube (DOT) shield machine is that it is easy to roll during construction. A rolling correction operation is necessary to correct this deviation laterally. One of the rolling correction operations is to grout in the opposite direction of rolled angle, resulting in a torque on the tunnel lining. Therefore, the surrounding environment and the internal force in the lining will be changed during the process of a rolling correction. In order to investigate the behavior of the tunnel lining, the finite element method (FEM) is used to analyze the internal force in the lining caused by the rolling correction. The results indicated that rolling correction causes significant changes in the internal forces of the lining. An increase in rolling angle produces in the internal force with some points showing increase (the maximum can be 5-6 times) and with some points showing decrease. Therefore, it is reasonable to consider the redistribution of these internal forces in the lining design.