Some foundations of Ocean engineering structures are always in addition to withstand the vertical gravity loads, but also to horizontal loads induced by sea wave and current, which makes the foundation subjected to concentrated force, overturning loads and torque loads, the above loading state including vertical, horizontal and overturning moment loads are termed combined loading. So it is very necessary for the safety of ocean engineering structures to study the deformation law of submarine seabed due to combined loading. On the basis of the three-dimensional elastic mechanics solution of circular foundations, the deformation law of submarine clay under circular foundation with six degrees of freedom is analyzed in detail using numerical calculation methods. Based on the above numerical results, this paper gives the elastic deformation law of clay in three dimensional spaces, gives a modification to the traditional elasticity theoretical solutions, and gives clay coupled deformation mechanism under three-dimensional circular foundation with six degrees of freedom.

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