Mechanism Research And Numerical Simulation Of The Column Hammer Dynamic Replacement

The column Hammer Dynamic Replacement is an improved foundation treatmentmethod based on general dynamic compaction and dynamic replacement. it compress thethick material such as idustrial waste and cnstruction wste into the soil to form thecomposite foundation,in this way,we can improve the bearing capacity and reducesedimentation of the foundation.In this paper, on the basis of the summary and analysis of previous research on thedynamic compaction, the following:1. use the of wave theory to elaborate Reinforcement Mechanism of the columnhammer Dynamic Replacement, analysis the differences of dynamic compactionmechanism between the the ordinary dynamic compaction mechanism and The columnHammer Dynamic Replacement from the prospect of wave propagation, and introducebearing capacity and settlement calculation method of the column hammer dynamicreplacement by point of the composite foundation;2.On soil modified Cambridge model, finite element analysis software ABAQUSsimulation of the column hammer the dynamic compaction the replacement methodtamping role process, have unearthed the displacement and stress distribution, the wavetheory describes the column hammer Dynamic Replacementthe application of the validityof the interpretation;3.According to the wave theory, taking into traditional dynamic compaction theconstruction parameter selection method, derived the column Hammer of DynamicReplacement effective depth, tamping energy tamping construction parameters such aspitch selection method.In summary, Considering the complexity of the column hammer dynamic replacement,we can not understand it deeply in theory, and solve the engineering problems by regionalexperience. This article conduct a meaningful attempt,and provide theoretical referenceand design guide to engineering practice of the column hammer dynamic replacement.