Undrained seismic bearing capacity of strip footing adjacent to a heterogeneous excavation

Abstract

The analysis of the bearing capacity of strip footings sited near an excavation is critical in geotechnics. In this study, the effects of the geometrical features of the excavation and the soil strength properties on the seismic bearing capacity of a strip footing resting on an excavation were evaluated using the lower and upper bounds of the finite element limit analysis method. The effects of the setback distance ratio (L/B), excavation height ratio (H/B), soil strength heterogeneity (kB/c_u), and horizontal earthquake coefficient (k_h) were analyzed. Design charts and tables were produced to clarify the relationship between the undrained seismic bearing capacity and the selected parameters.

Graphical abstract

Keywords

excavation / finite element limit analysis / heterogeneous soil / strip footing / undrained bearing capacity

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