Abstract: Long-term settlement caused by subway operation can be divided into settlement caused by undrained accumulated residual deformation and consolidation settlement caused by cyclic pore pressure dissipation, the former of which is obtained by the layer-wise summation method based on the empirical formula of accumulated plastic deformation and a three-dimensional finite-element model of the foundation soil stress, and the latter of which is obtained by a dynamic triaxial test that simulates pore pressure change rules under different initial consolidation degrees. Through fitting of experimental data, a pore pressure calculation model is established for the Hangzhou soft soil under different consolidation degrees and cyclic loading, and combined with the consolidation settlement calculated by one-dimensional Terzaghi consolidation theory, long-term settlement under cyclic subway traffic loading can be obtained. The results show that settlement caused by residual deformation develops rapidly at the early loading stage, settlement caused by pore pressure dissipation occupies about 30% of the total settlement, and this ratio decreases with the increase of the consolidation degree and tends to be stable after six months.