Evaluation of Overall Stability for Garage Foundation Excavation of High Buildings

Han Yunshan*, Wu Han, Dong Yanli, Wang Yuanlong
School of Science, North University of China, Taiyuan, Shanxi, 030051,P.R. China.

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© 2015 Yunshan et al;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Correspondence: Address correspondence to this author at the School of Science, North University of China, Taiyuan, Shanxi, 030051,P.R. China; Tel/Fax: +86 3513923593; E-mail:


In current projects, many garages were built after the main structure finished. However, the excavation of garage foundation not only changed the bearing capacity modification by depth, but also makes the soil pressure along the two sides become different. And thus the stress condition of the main building foundations is changed. The change of stress condition affects the stability of main structure directly. Based on the stress condition of high buildings foundation after one side excavation, the change of settlement under the eccentric action was studied. The change of settlement makes the tilt turning appear and thus makes the overturning resistance moment change. The dynamic principle of stability safety factors were also investigated in this paper. The effect of settlement affected by the change of stress condition was considered in the stability analysis of high building. This new method can better and truly evaluate the effect of excavation of foundation on the stability of overturning resistance than the traditional method considering only the static load-carrying capability. The operation of the new method is stronger in the project application for its clear mechanism.

Keywords: Dynamic, foundation, overturning, settlement, stability.