Abstract The center drift method is commonly used in the construction of subway stations because it effectively improves the stability of surrounding rock during excavation. The existence of buildings near a proposed station could cause an imbalance of in-situ stress around the excavation area, which could have an adverse effect on the supporting structure. Using FEM analysis on center drift construction, the bending moment of the support structure in every step of excavation was calculated, the effects of the existing building on the support structure were determined, and the characteristics and variation pattern of the internal force of the support structure are summarized. The results show that the existing building will cause force deflection of the supporting structure during the station excavation and further result in partial differential settlement.
Abstract：
The center drift method is commonly used in the construction of subway stations because it effectively improves the stability of surrounding rock during excavation. The existence of buildings near a proposed station could cause an imbalance of in-situ stress around the excavation area, which could have an adverse effect on the supporting structure. Using FEM analysis on center drift construction, the bending moment of the support structure in every step of excavation was calculated, the effects of the existing building on the support structure were determined, and the characteristics and variation pattern of the internal force of the support structure are summarized. The results show that the existing building will cause force deflection of the supporting structure during the station excavation and further result in partial differential settlement.
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Cite this article:
.FEM Analysis of Forces for Support of an Existing Building during the Center Drift Construction of a Subway Station[J] MODERN TUNNELLING TECHNOLOGY, 2012,V49(5): 73-78
2012, Vol. 49 