Composite lining-ground interaction behavior in a cold-region circular tunnel under anisotropic frost action

作者：Li, Hongwei; Lai, Yuanming^*; Zhang, Huyuan; Chen, Yanyan; Jiang, Wangtao; Ran, Jiachuan

来源：International Journal of Rock Mechanics and Minings Sciences, 2023, 164: 105341.

DOI：10.1016/j.ijrmms.2023.105341

• Lining-ground interaction
• Cold-region tunnel
• Stress anisotropy
• Principal stress rotation
• Frost heave
• Internal forces

A refined closed-form analytical solution is developed to evaluate mechanical behavior of the composite liningground interaction in cold regions subjected to the coupling effects of anisotropic frost heave and dynamic loads. The composite lining is treated as a homogenized circular section of equivalent mechanical properties consisting of an inner thin-walled shell and an outer thick-walled cylinder embedded in the homogenous infinite isotropic medium. Solutions for field quantities and internal forces of the composite lining-ground interaction have been derived for cases involving no-slip and full-slip at the lining-lining interface and lining-ground interface. The proposed solutions based on the theory of elasticity is more appropriate for predicting the mechanical behavior of the composite lining-ground interaction under anisotropic frost action. When applying the theory of thinwalled shell and thick-walled cylinder to derive the equations that conform to the proposed methodology, mechanical behavior of the composite lining-ground interaction under different influencing factors is discussed and analyzed. The proposed analytical solutions can tackle with the soil-structure interaction problems in cold regions.

• 单位
  中国科学院; 兰州大学