Study On The Earth Pressure Of Large Diameter Cylinder Shell Structure

Large diameter cylinder shell structure is a new structure applied in port engineering, because of the simple construction, economization of materials, good condition of the force suffered, rapid speed of the construction, little cost and good wear, it is attached importance more and more in engineering field. The earth pressure is the main load imposing on the structure. Because the mechanism between structure and soil is very complex, and theories of some calculation are not very perfect, the broad application of this structure is held back. The model of the earth pressure distribution along the different sides of large diameter cylinder structure is studied, in the base of the achievement of the former research and the experience from practice, the model is be put forward. The regulation of earth pressure's distribution in the plane is studied as an emphasis in this paper. Regard the equilibrium of the small soil elements close together and the shape's characteristics of the cylinder, a formula that is applied to describe the distribution of the earth pressure in the plane is put forward, and a comparison with the experiential formula is be drawn. FEM is applied to analyses the displacement and internal force of the structure under the two different mode of distribution of the earth pressure. From the study we can see that the new formula of the earth pressure is even more precise in theory and even more prevalent in application.