Numerical Analysis And Research On Dock Backplane Based On Soft Soil Pile Foundation

Nowadays,China’s shipbuilding industry is vigorously developing. Shipbuildingindustry is attached more and more importance to the entire national economy. With thegrowth of the ship-repairing and shipbuilding, China will come to the peak of dockconstruction. Backplane as the main part of the dock project, costs about1/3of the cost ofthe dock, or even more. The accuracy of the backplane structure calculation and analysishas great effects on dock safety engineering and economic. The dock structure mostly builtin the coastal areas of soft ground, using of pile foundation type. Backplane on pilefoundation withstands uplift pressure, boat weight, water weight and other complex loadwhich lead to complex stress mechanism of backplane-soil-pile joint common action. Atpresent, the related research material rarely.At present, numerical analysis is widely used in such complex structure which iscomposed of backplane and pile and soft soil. After constructing the numerical models,stress and deformation of structure can be calculated by nonlinear finite element method. Inorder to study the internal force and deformation of the soft soil pile backplane structure ofdock chamber of dock engineering, the paper mainly completed the following work:(1) Calculation of backplane structure needs to determine the load boundary, and theseepage pressure is one of the main loads. In combination with the dock engineering as anexample, the dock chamber seepage simulation using temperature module of finite elementsoftware ADINA, to determine the seepage pressure acting on the backplane.(2) It is necessary to pay great attention to model research finite element solution ofspace problem systematically, simulate the constitutive relations of material correctly andset appropriate interface element to satisfy the numerical accuracy and efficiency, and thereasonable and feasible computational analysis methods of the soft soil pile backplanestructure is presented.(3) The paper built up a3D model of the soft soil pile backplane structure, andcomputed the model numerically. And then, the dock floor structures on which there areship and no ship, are studied to get its force and deformation. The numerical results arecompared with the measured results to verify the reliability of the numerical results. Takingrational intensity control and distortion control as the target, the paper has studied the stressand deformation of the pile backplane structure under different pile diameter and pilelength and floor thickness.