Study On The Large T-shaped Diapragm Wall Wharf And Displacement Of Anchored Points

As an important form of wharf structure, sheet pile wharf is not widely applied in our country compared with gravity wharf and open type wharf on piles because of the constraints of construction technology and the imperfect design theory. Moreover, owing to the existing recommended m method is immature in the value of soil's m and the calculation method of displacement of anchored points, the design results which are suitable for light-tonnage have not been verified in engineering for diapragm wall wharf in heavy-tonnage. Based on this, the specification method and the finite element method (FEM) are used for obtaining stage results of the large T-shaped diapragm wall wharf and displacement of anchored points.Firstly, the purpose of this dissertation using specification method is to examine whether the significant effect on the T-shaped and Rectangle sections of the front wall in two varying conditions, one is different displacement of anchored points and the other is diversified berth situation. Through comparing cost of construction per unit width, it could be slightly affected by factors of displacement of anchored points in the case of light-tonnage. However, as to heavy-tonnage, these factors exert a crucial influence. Therefore, considering displacement of anchored points in the process of large deepwater diaphragm wall wharf design becomes necessary.Secondly, in terms of analysis approach, FEM is employed. Using PLAXIS to achieve centrifugal model test fitting about sheet pile wharf, we get a series of numerical simulator after adjusting related parameters. These results provide a reasonable guideline for choosing suitable structure model and determining parameters.Thirdly, some influential factors to diaphragm wall wharf can be discussed based on comparing previous analyses, such as buried depth of the front wall, the length of anchor and the length of tierod. Meanwhile, optimizing sheet-pile wharf in both no existing and existing preballasting conditions and comparing their applicabilities can guide experience in engineering.Finally, based on comparison results between FEM and the specification method, it is shown that not only buried depth of the front wall and the length of anchor affect results, also control section bending moment of front wall varying with structure's scale. It will lead to a new analysis topic by discussing reasons cause to these differentials.This dissertation aims to analyze the large T-shaped diapragm wall wharf and displacement of anchored points to work out a series of numerical simulator about sheet-pile wharf. Taking advantage of results from FEM, we want to show differentials among every optimized proposal so that guide in practice. In addition, it could be helpful to promote future study by providing analyses on differentials between FEM approach and the specification method.