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Abstract For high rock slopes，the mechanical parameters on the potential sliding surface，the reinforcement forces needed after slope excavation，and the correlation between the calculated factor of safety and actual safety margin will directly influence engineering safety and economy. Based on back analysis methods for determining mechanical parameters of potential sliding plane and their shortcomings，the minimum value criterion of mechanical parameter selection is proposed；and the maximum reinforcement force criterion is then proposed on the basis of the equivalence of the largest reinforcement force needed and the weight of excavated rock body. Finally，the upper and lower limit criteria of the numerical results used for stability analysis and assessment are put forward and applied to engineering design based on PAN Jiazheng¢s upper and lower limit theory. It will helpfully provide designers with criteria of slope stability analysis and assessment on reinforcement scheme selection of high rock slope.
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Received: 08 February 2010
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2010, Vol. 29 
