Slope Stability Analysis in Landslide Area and Strength Parameters

Abstract

In order to investigate the influence of strain rate on the results of slope stability analysis in landslide area, the ring shear tests were performed on cohesive soil with normally and overconsolidated states under different strain rate.The conclusions from this study are as follows; i) The shearing strength parameters are affected by the overconsolidation ratio in the specimen and the strain rate. This trend become more clearly as the clay fraction in the sample increases significantly. ii) The safety factor decreases as the strain rate decreases. The values in the case of e=0 .0004 mm/min and e=0.004 mm/min are almost the same, while they differ significantly between e=0.4 mm/min and e=0 .04 mm/min. iii) The shearing strength parameters considering the actual movement rate and the stress state of the landslide area are useful in making stability analysis.