| The requirement of new retaining structure is becoming eager along with the fast development of engineering projects. The spatial retaining structure which is safe and economy is the important development direction in new retaining structure. But the study of interaction mechanism of pile and soil and force and deformation character of front-sheet pile and offside-high pile structure is less which is a new type of spatial retaining structure, and the realization of project engineer is not enough, so we should study in depth on the interaction mechanism, and analysis the fore and deformation character of the structure which has reference value on some relevant projects. Base on the some wharf revetment projects, the text analyzes the interaction mechanism of pile and soil and the force and deformation characteristic of the front-sheet pile and offside-high pile structure on action of excavation, backfill and loading.For the requirement of development of new retaining structure, the text induces several new types of retaining structure, and finds out their scope of application and force characters preliminary. Then the text sums up the research on interaction mechanism of pile and soil of wharf with piles.Base on the case of wharf revetment project, the text set up the soil-pile interaction model using the FEM software and flat analysis method, and discusses the soil-pile interaction and fore and deformation characters on action of excavation, backfill and loading by the simulation of load processes.Through analyzing the displacement of platform and piles, the displacement field of soil, and the distribution of earth pressure on piles, the text analyzes the soil-pile interaction under different load processing.The text analyzes the influence of some factors just like pile diameter of front piles, distance between back piles, and distance between front pile and back pile, and modulus of compression of soil between front pile and back pile.
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