Depth effects on stress and displacements of tunnel excavated with TBM

作者：Zhang Kun-Yong^*; Wen De-Bao; Shen Bo

来源：Journal of PLA University of Science and Technology(Natural Science Edition), 2012, 13(3): 298-304.

• Area development
• Buried depth
• Computer results
• Depth effects
• Ground stress
• Lateral pressure coefficient
• Plastic area
• Rock stability
• Stress and displacements
• Stress-strain distributions
• TBM
• Tectonic stress
• Tunnel boring machines

Adjacent rock stability of tunnel excavated with tunnel boring machine (TBM) was analyzed with FEM under different buried depth conditions. Stress strain distributions, plastical area development were studied by analyzing the numerical computer results. The calculation shows that the increment of buried depth, the stress, displacement, plastic area and the possibility of the rock outburst increase in different degree. Tectonic stress is the main ground stress. There is no tensile stress around the tunnel. In addition, plastic area is distributing in the shape of torus. Under the condition of large buried depth, the calculation result of M-C criterion is prior to D-P criterion. Convergence displacements of duct pieces increase continually along with the increase of the lateral pressure coefficient. Duct piece deformation is increasing to the opening direction until 500 meters away from the heading face when it becomes stable.

• 出版日期2012
• 单位河海大学