The influence of soil anisotropy and K0 on ground surface movements resulting from tunnel excavation

摘要: Finite element (FE) analysis is now often used in engineering practice to model tunnel-induced ground surface settlement. For initial stress regimes with a high coefficient of lateral earth pressure at rest, K0, it has been shown by several studies that the transverse settlement trough predicted two-dimensional (2D) FE too wide when compared field data. It suggested 3D effects and/or soil anisotropy could account for this discrepancy. This paper presents suite both 2D and analyses tunnel construction London Clay. Both isotropic anisotropic non-linear elastic pre-yield models are employed, that, even degree anisotropy, remains shallow. By comparing longitudinal profiles obtained from data demonstrated extends far direction, consequently difficult establish steady-state set...