Study on Creep Characteristics of Cemented Soil Under Long‐Term Immersion and Wet–Dry Cycling Conditions

This study investigated the long‐term stability of cemented soil pile foundations in the complex water environment of the Pearl River Delta (PRD). Creep tests of cemented soil were conducted under different moisture conditions, including natural condition, saturated condition, and wet–dry cycling. A creep model was developed by integrating numerical simulations to examine water–stress interaction. Under wet–dry cycling conditions, the required time to achieve stable creep for specimens initially increased, then decreased, and finally increased again with variations in cycle duration. Finally, an innovative creep rate intersection method was proposed to quantify the long‐term strength values of cemented soil under both natural and saturated conditions. The full‐stage creep model developed based on the improved Burgers model significantly outperforms traditional approaches, successfully overcoming the limitation of conventional models in describing the accelerated creep phase. During this stage, it achieves a remarkable goodness‐of‐fit with R 2 reaching 0.97. Furthermore, numerical simulations were employed to elucidate the long‐term deformation behavior of subgrade engineering under different moisture conditions.