Effects of Soil Dilatancy Angle on the Stability of Stratified Slope
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Abstract:
The soil dilatancy angles of the stratified slopes with different layers, different materials, and different heights were reduced to analyze the effects of soil dilatancy angle on the stability of stratified slope using the strength reduction method and finite element software ABAQUS. The results showed that when the soil dilatancy angle decreased for any soil layer, the safety factor Fs increased with the increasing of dilatancy angle while the increment decreased gradually and the safety factor was not affected by the soil material, height, number of layers. The dilatancy angle of a single soil layer had lower effects on the safety factor Fs compared with the overall slope, and the dilatancy angle of the upper soil layer of the slope had higher effects on the stability of the stratified slope. With the increasing of dilatancy angle, the displacement trend of the slope became obvious with an expanding range of plastic zone and an increasing sliding arc radius and safety factor . In practical engineering, it is better to reduce the soil dilatancy angle of the slope to a carefully selected value .
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