Evaluation of the allowable axial bearing capacity of a single pile subjected to machine vibration by numerical analysis
AbstractThe purpose of this study is to analyze the changes in the vertical load of the pile when the additional vibration load due to mechanical vibration acted to the single pile supporting a vibration machine, and to review the validity of the typical calculation method for the axial bearing capacity of a single pile supporting the vibration machine by numerical analysis. Firstly, the 3D numerical model for the load displacement behavior of a single pile was constituted. After the model was statically loaded to the allowable load in static analysis, the axial vibration due to machine vibration was added to the pile top in dynamic analysis. In these procedures, the static analysis was verified with the centrifuge test results for a single pile. Based on the analysis results, it was found that the additional dynamic load caused by machine vibration is about 6% of the allowable static load. It was thought that the design concepts of the machine foundation, assuming that the additional dynamic load due to machine vibration equals to 50% of the static load in current code, is excessively conservative.
International Journal of Geo Engineering