Analysis of Surrounding Rock Creep Effect on the Long-Term Stability of Tunnel Secondary Lining

The secondary lining failure of deep buried soft rock tunnel often occurs, which is obviously related to the time factor. formation mechanism this phenomenon studied in paper. Therefore, combination situ stress measurement and neural network inversion used analyze distribution characteristics stress. At same time, creep surrounding are tested laboratory, key parameters obtained. Combined with rock, calculation model established by using discrete element simulation technology considering joints rock. According above multiple information, different periods analyzed creatively. Finally, method setting arch adding anchor bolt parts proposed, significant effect results