TY - EJOU AU - Bin, Li AU - Hongyuan, Fang AU - Wei, He AU - Bin, Sun TI - Stability Analysis of Cross-channel Excavation for Existing Anchor Removal Project in Subway Construction T2 - Computer Modeling in Engineering \& Sciences PY - 2017 VL - 113 IS - 1 SN - 1526-1506 AB - The cutter head will be stuck when the shield machine pass through the area existing anchor left by foundation construction of surrounding high-rise building. Subsurface excavation method is an efficient way to remove the existed anchor. In this paper, a three-dimensional finite element model is developed to study stability of cross-channel excavation. The time-spatial effects of arch crown settlement, intrados uplift and side wall horizontal convergence are analyzed according to different excavation size, lining thickness and lining order. The results show that the excavation size is the main factor to control the deformation of the surrounding soil, especially in arch crown settlement; The influence of lining thickness on the spatial effect of surrounding soil deformation is obvious when the excavation size is large, but little on the time effect; The influence of the lining order on the deformation of the surrounding soil is obvious, in particular, the larger the excavation size, the more obvious advantages of the lining order. Finally, based on the time-spatial effects comparison of nine excavation schemes of the cross-channel, an optimum excavation scheme is adopted in the actual project. KW - Existed anchor KW - removal project KW - ABAQUS KW - cross-channel excavation KW - time-spatial effect DO - 10.3970/cmes.2017.113.054