Research Of Laterally Loaded Pile Groups Based On P-y Curve Of Lateral Single Pile

Now laterally loaded pile groups are used widely in Ocean Engineering, BridgeEngineering, Civil Engineering and so on. For design of laterally loaded piles,themethod of p-y concept has widely been uesd around the world based on non-linearWinkler foundation method. The concept of p-multiplier(also called f_m) weredescribed by Brown as a way of accounting for pile group effects by makingadjustments to p-y curves. Using this concept and numerical methods involving finitedifference approach for single pile, the performance of pile groups are easily obtained.Based on this approach, this thesis focuses on the following two parts of content:(1) Based the review of currently analytic methods for laterally loaded piles, aspreadsheet program FDLLP involving finite difference based on the generic LFP isproposed, and the main paramters of FDLLP are discussed.(2) In the second prat of this thesis, a three dimensional nonlinear unmericmodel of the coupled finite element-infinite element-contact interface element isestablished. A three dimensional program, APLLP, based on this model, is used toanalyze the main parameters: f_m, g_m, s_f, used to account for group reduction effectsunder the influence of pile spacing(D), pile diameter(d), the number of row, positionof every row and the property of soils. At the same time, the practical values of f_m, g_m,s_f are also recommended for design of laterally loaded pile. At last, through theproposed the values of f_m, g_m, s_f and FDLLP, a practical project is calculated withthe comparison of measured values.In the finality, the pro blems requiring further studies are discussed.