Abstract: A model test performs to study the failure progress of different slopes morphology soil slope by a self-made one-way vibration test-bed. The test includes eight test models and three patterns of slope (concave slope、convex slope and combination of concave and convex slope), The failure of slope is induced by applied initial displacement with the vibration test-bed and the failure progress is recorded with camera, slope models deformation and failure characteristics are summarized and analyzed. The result shows that the concave slope failure reason is slope surface formation of transverse crack drive the whole slope destroyed, convex slope failure is due to the slope top formation of transverse crack drive the whole slope destroyed, combination of concave and convex slope failure by the raised portion of slope surface control. Further studies proves that the more intense the degree of the concave and convex parts is, the more strong the slope damage is. The study results are useful to understand better the progresses and forms of soil slope failures with different surface morphologies and provide a scientific basis for treatment of engineering slope.

Key words: engineering slope, model test, slopes morphology, deformation and failure characteristic