Abstract
The failure modes of suction bucket foundation - which have different length-to-diameter ratios - are proposed. The research shows that the failure modes have something to do with the length-to-diameter ratio. According to the rotation center position of the bucket foundation and distribution form of soil resistance - which have different length-to-diameter ratios - a three-dimensional finite element model is used to build the computational formula of the horizontal bearing capacity. Compared to the existing research, this paper aims at the saturated sand ground bucket failure mode - considering the length-diameter ratio of instability mode influence - establishing the different simplified calculating model according to the rotation center position as the boundary of the upper and lower parts of soil resistance distribution form. The effects of friction acting on the bucket's outer surface and the base bottom surface on the horizontal bearing capacity is also taken into account.
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