Ground surface loading and unloading model tests were carried out for two types of ground, soft mortal and sand, above a tunnel to evaluate the analytical method for studying the tunnel lining deformation behavior caused by adjacent construction work of banks, structure foundations and excavation.  As a result, nonlinear deformation behaviors of the ground and the tunnel lining were comprehended.  It was also shown that these experimental results could be simulated by FEM analysis using a nonlinear ground model and a contact model between ground and tunnel lining.

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