3D Analytical Solution of Soil Deformation Induced by Shield Tunnelling Construction

Abstract:

Three-dimensional (3D) analytical solution of soil deformation induced by ground loss in shield tunnelling construction was researched. It is put forward that the ground loss ratio is not a fixed value, but changes in driving direction. The calculation formula of ground loss ratio in driving direction was deduced. Based on two-dimensional (2D) analytical solution of uniform ground movement model of shield tunnelling, the three-dimensional analytical solution of ground deformation induced by ground loss is deduced. The settlement in vertical direction and the displacement in lateral horizontal direction at any point can be calculated; and the method is only applied to the construction phase. In analytical calculation: the predicted soil displacements are in good agreement with the measured values, and the method is easy to use; the closer the soil to tunnel is, the faster the lateral horizontal displacement changes; the extent of change of lateral horizontal displacement in longitudinal direction is smaller than displacement in lateral direction.

• Periodical: Advanced Materials Research (Volumes 261-263)
• Pages: 1814-1819
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.261-263.1814
• Online since: May 2011
• Authors: Gang Wei, Jie Hong, Xin Jiang Wei
• Keywords: Ground Loss Ratio, Shield Tunnel, Soil Deformation

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