Analysis And Optimizational Design Of The River Revetment Structure With Pi-shaped Double-row Piles In HangJiaHu Area

HangJiaHu region is located in the Yangtze River Delta economic zone, which is also densely populated and economically developed. With the rapid development of the economy, the water environment is becoming more and more serious. In order to ensure the project can be implemented successfully, the pi-shaped double-row-pile revetment structures are applied. However, the research on behaviour of this stucture has not to reach an agreement, and its applications in large-scale projects are conservative.Compared with the double-row-pile retaning structure in foundation pit, the pi-shaped double-row-pile revetment structure of river bank has its own structural characteristics.1) pile spacing is bigger in the back row and there are row piles pull beam around the pile top instead of the crown beams through pile top;2) the back row piles play maily a role as the anchor.Based on the project of the river training works of TaiJiaHe, this paper present numerical simulation on the double-row-pile revetment structure, the main contents are as follows:1) Systematic summary of exist research of double-row-pile retaining structure, such as the theory of double proportions coefficient, limit equilibrium method, equivalent flexural stiffness method and elastic foundation beam method;2) Briefly describes the basic theory of finite element method, the analysis numerical softwares ABAQUS and PLAXIS.3) The3D and2D FEM alalysis model of the pi-shaped double-row-pile revetment structures are presented. The effects of a variety of factors such as the passive soil reinforced zone, the pile diameters, pile spacing, row distance are thouroughly discussed. The results could be helpful for the optimal design on this type of revetment structure...