Study on the impact of partial unloading on the structural deformation of prefabricated segmental subway tunnels.

As partial unloading progresses in the upper foundation pit, the bending moments and axial forces acting on the tunnel segments exhibit a decreasing trend.

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Reinforcement simulation The partial unloading from excavation of the foundation pit caused significant uplift deformation in the underlying prefabricated tunnel segment structure, with an increasing trend in internal forces at certain segments.

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