ACCURATE SOLUTION OF MOST DANGEROUS CIRCLE SLIP SURFACE IN SEEPAGE SOIL AND ROCK MASS

The influence of groundwater seepage on stability of soil and rock slope is analyzed.The analytic solution of stability of water-penetration soil and rock slope is set up under ground water seepage.The most dangerous circle slip surface is located with DFP change-scale method of nonlinear programming.In the condition of high pore-hydraulic pressure,the most dangerous circle slip surface is located with Fellenius Method and DFP change-scale method.Then the safety factor of the most dangerous circle slip surface is evaluated with Spencer method or Morgenstern-Price method.The influence coefficient of seepage on slope stability is calculated in a cutting slope.