Embankments and foundation geotechnical structures are frequently subjected to long-term cyclic loading due to traffic during their service life. Excessive cumulative deformation can lead to pavement cracking and uneven settlement of the subgrade. This study conducts a series of dynamic triaxial tests to analyze the effects of the number of cycles (N), effective confining pressure (sigma(c)), and dynamic stress amplitude (sigma(d)) on the axial cumulative strain (epsilon(d)) characteristics of solidified mud samples. Additionally, it investigates the evolution model of epsilon(d) of solidified mud and establishes a predictive model for this strain. In conjunction with the NMR tests, this research further investigates the effects of sigma(c) and sigma(d) on the pore distribution of solidified mud after loading. Ultimately, the correlation between microscopic pore structure indicators and epsilon(d) is elucidated. The results indicate that the epsilon(d) behavior of solidified mud under cyclic loading exhibits characteristics of plastic shakedown. Furthermore, the exponential hyperbolic function model more accurately characterizes the relationship between epsilon(d) of the samples and N. Before and after cyclic loading, the micropores of the samples accounted for over 95 % of the total pore volume, predominantly concentrated in the radius range of r < 0.3 mu m. A correlation exists between the average pore size of the sample and epsilon(d), which is primarily influenced by sigma(d) and sigma(c).

来源平台：TRANSPORTATION GEOTECHNICS