Settlement Analysis Of Super-tall Pile Foundation In Soft Soil Area

Scholars discovered through research and testing, analysis of pile foundationsettlement surviving a lot of theoretical and practical problems. Theoretical andpractical result of large differences, over a wide range of empirical coefficients, etc.,are to make computing a pile pile settlement theoretical research problems. To solvethis problem, engineering and academia to pay various efforts, but failed to makesubstantial progress, the main reason is the pile foundation settlement calculationincludes many parameters, such as a pile of technology, geometry pile group (pilelength, pile spacing, pile aspect ratio, number of piles, etc.), changes in thefoundation soil, soil type, the upper load type and size. Due to a variety ofover-reliance on empirical coefficient calculation methods, the calculation resultsunder different conditions is difficult to achieve uniform accuracy. Therefore, theestablishment of clear and intuitive, and the small amount of calculation on the basisof reasonable mechanical model to evaluate and analyze the basic foundationsettlement deformation is very necessary.From the start of pile foundation settlement and deformation theory, in-depthanalysis of pile group foundation settlement calculation methods, examples of projectmonitoring and analysis of pile foundation settlement and use FLAC3D law andhierarchical analysis method for calculating the sum of Tianjin Tower works pilefoundation settlement, the final comparison site monitoring data, discuss reasonableaccuracy FLAC3D method.In this paper, Tianjin Tower subsidence monitoring project conducted analysis,the maximum amount of Shen cumulative drop, the average cumulative settlementamount and the average settlement rate, based on observational data to draw a curveof the settlement observation points, the settlement provides for the calculation of theodds ratio. This paper analyses and summarizes the current main methods for calculating thesettlement of pile foundation, settlement value tower engineering calculation, andmade a comparison between the measured value of all kinds, settlement calculationmethod are discussed in detail, and discusses the advantages and disadvantages ofvarious methods, theoretical guidance is provided for the calculation example. Thecalculation results of the equivalent layerwise summation method and FLAC3Dmethod and practical monitoring data were compared and analyzed, the FLAC3Dfinite difference method of settlement calculation and analysis of rationality andaccuracy in pile foundation.