Abstract Based on the mined construction of Taoranqiao station of Beijing metro line 14, the law of surface settle? ment induced by construction procedures of the center drift excavation method is analyzed and the experience is summarized by means of geometrical leveling. The results show the settlement mainly undergoes five stages, i.e., 1) settlement stage Ⅰ in primary support construction of the pillar pilot tunnel, 2) settlement stage Ⅱ in secondary lining construction of the central pilot tunnel, 3) settlement stage Ⅲ in construction of the floor and buckling arch of the central pilot tunnel, 4) settlement stage IV in construction of the primary support at the side pilot tunnel, and 5) settlement stage V in secondary lining construction. The settlements of phase I and phase IV account for the largest proportion of the final settlement; the curve of final settlement is axisymmetric, with the central line of the central pilot tunnel to be the axis of asymmetry.
Abstract：
Based on the mined construction of Taoranqiao station of Beijing metro line 14, the law of surface settle? ment induced by construction procedures of the center drift excavation method is analyzed and the experience is summarized by means of geometrical leveling. The results show the settlement mainly undergoes five stages, i.e., 1) settlement stage Ⅰ in primary support construction of the pillar pilot tunnel, 2) settlement stage Ⅱ in secondary lining construction of the central pilot tunnel, 3) settlement stage Ⅲ in construction of the floor and buckling arch of the central pilot tunnel, 4) settlement stage IV in construction of the primary support at the side pilot tunnel, and 5) settlement stage V in secondary lining construction. The settlements of phase I and phase IV account for the largest proportion of the final settlement; the curve of final settlement is axisymmetric, with the central line of the central pilot tunnel to be the axis of asymmetry.
.On Surface Settlement during Subway Station Construction Using the Center Drift Excavation Method[J] MODERN TUNNELLING TECHNOLOGY, 2018,V55(2): 189-193
2018, Vol. 55 