| Deformation and slide have taken place at both the surface of the pier and part of the quay walls in wood pile-supported pier in Qingdao. In this dissertation a systematic and all-around study is carried out in order to provide an effective guidance for the work of design, construction and management of the pier.On the basis of an all-around analysis typical areas were selected to carry out the deformation monitoring. The monitoring depth formulation is modified. The model of non-stable time series raised by Box-Jenkins is applied to give a mathematical prediction of the deformation tendency. The stability status and the impacts on the stability of the pier by the loading, hydrodynamic and geological conditions are analyzed. Compared the actual monitoring data, the prediction model can be applicable for the deformation prediction of the pier in QingDao Habor with high precision.In this dissertation, considering all the engineering properties, we also build a FEM model to simulate the failure process of the pier. The ideal elastic-plastic constitutive relation and the pile-soil contact element are adopted in the FEM numerical analysis. It is simulated that the lateral displacement field, the slide distance between the contact surface and the contact status. We conclude that the conjunction intensity between the platform and piles has a prominent impact on the deformation on the surface and there exists the "curtain effect" of the pile that weakens the slide tendency to the sea. It is confirmed the most disadvantageous load cases.The research in the dissertation incarnates the organic connection between the academic research and the application in practice. We give a quantitative analysis of the factors influencing the slide and internal mechanics mechanism. It offers the scientific basis for the repair work in harbor bureau, at the same time it provides a reference for the subsequent work in the relevant fields.
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