Long-term settlement of metro tunnels due to repeated train loading in a four overlapping tunnels case is investigated based on finite element method and empirical method, and the influence from the net distance and the train speed is discussed in detail. The results show: (1) Uneven settlement is observed on the tunnels with a maximum settlement occurring at the intersection of upper and lower tunnel axes. (2) The range of the settlement trough is within about 4 D (diameter of the tunnel) from the intersection points, beyond which dynamic amplification effect of the four tunnels is too small to cause uneven settlement. (3) The net distance of the upper and lower tunnels has a nonlinear effect on the uneven settlement that uneven settlement increases sharply with the decreasing of net distance. (4) However, the train speed has little influence on the uneven settlement within the common speed range in practical.

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