Analysis of Surface Deformation by Tunneling Excavation under Small Strain
In this paper, small strain model, being able to reflect the small strain characteristics of soil, was adopted to calculate and analyze surface deformation caused by shield tunnel construction. Under the single tunneling, the maximum surface settlement is generally just above the tunnel axis, and surface settlement is symmetric distribution on both sides of the tunnel axis, and decreases with the increase of the horizontal distance; the longitudinal surface settlement is "tilted S-shaped" curve, and tends to basically stabilize at a certain position behind the excavation face; The comprehensive comparison shows better consistency between the data from small strain model and those from actual measure, and then verifies the feasibility and effectiveness of the small strain model applied for surface deformation analysis caused by urban metro shield construction.
P. S. Zhang and W. Yan, "Analysis of Surface Deformation by Tunneling Excavation under Small Strain", Applied Mechanics and Materials, Vols. 94-96, pp. 1782-1786, 2011