The aim of this study is to reveal the influence of frozen soil anisotropy and thermal-hydraulic-mechanical coupling effects on the frost heave deformation behavior of sheet pile walls (SPWS) through numerical simulation and experimental verification. In this research, a thermal-hydraulic-mechanical (THM) model of frozen soils is improved by integrating the anisotropic frost deformation firstly. Then, considering the shear characteristics of soil-structure interface, a finite element analysis of SPWS during freezing is conducted based on the proposed THM model. The simulation results are then validated by a small-scale simulation test. The results shown that, the pile is subjected to large bending moments and normal stress at the junction between the embedded and the cantilever section. Embedment depth of pile is suggested to set be 1/3 to 1 time the overall lenth, which having a greater effect on antiing the frost deformation. Numerical simulation considering the anisotropic of frozen soil is closer to the experimental results than traditional calculation methods. The THM numerical method can well characterize the directional relationship between temperature gradient and pile deformation. In seasonal frozen soil areas, deformation numerical simulation that can be further developed by considering the effects of multiple freeze-thaw cycles in subsequent research.
