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  Safety of Subway Structures in Proximity of New Construction of a High-Rise Building

  Underground spaces in the Tokyo Metropolitan area have dense clusters of infrastructure facilities such as subways, and their effects must be taken into account when a building is to be constructed. In addition, the ground in the Tokyo area consists of deposits of soft soils, which exert further remarkable effects. When a high-rise building is constructed in the proximity of an existing subway structure, the stress in the ground changes in the course of construction and may exert an increased effect on the underground structure. This paper deals with the behavior of a subway tunnel in the course of construction of a high-rise building, which straddles over a tunnel, and an analysis simulating such behavior.

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