Study On The Characteristics And Bearing Capacity Of The Pile Wharf Under The Ship Load

With the development of China's shipping industry,the wharf gradually become larger and deeper hydration,the ship size also become larger to match the wharf,all of that have put forward higher requirements of the horizontal bearing capacity of the wharf structure.In this paper,the finite element numerical model is established to study the deformation characteristics and bearing capacity of the wharf structure with different foundation form under the ship loads.The main content is as follows:1.Based on a wharf project,the bent models and spatial models with different combinations of vertical pile and fork pile were established.To improve the grid quality of fork pile,the method of stiffness equivalence and mass equivalence were used to converte the cross section of pipe pile into the cross section of square pile.2.Make the the analysis of deformation characteristics of the bent models and spatial models,the study shows that the piles of the bent has the similar displacement distribution:there is a point on the displacement curve,at which the displacement is close to zero firstly,the point is below the mud surface with the distance of 4 to 5 times the width of pile.The type of pile foundation has little effect on the displacement distribution of the piles,the horizontal displacement of the fork pile in the opposite direction of horizontal load is larger than that of other pile.The study also shows that the spatiality of wharf has little effect on the displacement distribution of the pile.The displacement of the wharf with fork piles is also smaller than that of all-vertical-pile.The deformation of the space structure can be regarded as the deformation of each bent under different load.The load is mainly distributed in the load-acting bent and its adjacent side bent,and the load distribution coefficient of each bent is closer when the load is acted on the middle bent.3.Through the establishment of horizontal load-displacement curve,the deformation process and instability mode of the piled wharf are analyzed,and the horizontal load-displacement curves of different pile forms,different soil properties and the wharf spatial structure are compared with that of the example for the analysis of its impact on the stability of wharf.