Abstract: A threedimensional finite element analysis of sliding resistant caissoncasing and slope was performed for the evaluation of the effect of the casing. The factor of safety of the slope, deformation of the caisson as well as the stress in the caisson were analyzed with different sections of the caisson and the casings. The results indicate that: 1) High factory of safety can be found in the circular cased caissons, compared that of cased square caissons. 2) Casing results in the redistribution of the stress and can carry portion of shear and bending moment. Therefore, the effect of casing should be considered in the landslide mitigation design.

Key words: Slide Resistant Caisson, CaissonSoil Interaction, Numerical Analysis, Casing