TY - JOUR
TI - Numerical simulation considering the effect of uneven frost heave on tunnel structure in cold regions
AU - Li Ning
AU - Liu Zhi-Qiang
AU - Niu Guo-Dong
AU - Zhang Jian
AU - Li Jun-Ping
AU - Zhang Fan
JN - Thermal Science
PY - 2021
VL - 25
IS - 6
SP - 4545
EP - 4552
PT - Article
AB - Freezing damage is one of the main diseases of tunnels in cold regions. Water  storage behind the lining is a necessary condition for freezing damage.  Compared with the previous condition of uniform water storage behind the  lining, this paper explores the influence of water storage and frost heave  at different positions on tunnel structure in cold regions. Based on the  theory of thermo-hydro-mechan­ical coupling. The finite element model of  tunnel surrounding rock in cold area under different positions and different  water content is established and compared by using COMSOL software, the  mechanical characteristics of tunnel lining under different water storage  positions behind the lining are studied, and the influence of frost heave at  different positions on tunnel structure is explored. The numerical  simulation results show that no matter where the local water storage area is  lo­cated, the area with the largest frost heave force is located in the  lining structure, close to the surrounding rock. Different local water  storage positions will also have different influences on the tunnel  structure. In the same water storage area, the frost heave force will  increase with the decrease of temperature.