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Abstract An initial assumption is made on normal stress distribution along the slip surface，which is subsequently modified with a function involving two parameters to be determined to satisfy equilibrium conditions of all the forces and moments for the whole sliding body，and the formula of the slope safety factor is then derived. This method enjoys merits of straightforward computation process, no need of iteration, accommodating arbitrary shape of slip surfaces and the solutions being within the context of rigorous limit equilibrium.
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Received: 16 April 2002
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