Stability analysis of slopes with two stabilizing walls

概要

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A limit equilibrium method is presented to evaluate the stability of slopes reinforced with two stabilizing walls (e.g. sheet pile walls). The basic idea of the method is to allow presence of three different slip surfaces in upslope, midslope and downslope earth masses separated by the two walls. Contrary to conventional limit equilibrium analyses which predict a safety factor for a given sliding mass, the proposed method estimates forces acting on the stabilizing walls by specifying a target factor of safety for the stabilized slope.<BR>Estimation of interactive forces between earth masses and walls can be made using an existing method of slices. In this paper, the Bishop simplified method is applied, and a repeated trial procedure is established in order to find the most dangerous state for the walls and the corresponding set of three critical slip surfaces. An illustrative example is presented to demonstrate the effectiveness of the proposed method.
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