Abstract: The existing shallow buried subway tunnel near a large deep excavation site is subjected to both the unloading from the deep excavation and loading effect of the adjacent new building constructions. The subway structures under these lading conditions have the upward movement. This concern is numerically simulated by two different approaches and the soil improvement above the subway structures is proposed. The analytical results indicate that the soil improvement can effectively reduce the potential upward movement of the subway structures.
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Key words: Unloading in the Deep Excavation, Ground Improvement, Unfavorable Loading Conditions, Upward Movement, Numerical Simulation