Research on Flow Push Pile Effect of Post-liquefied Sand Based on VOF Method

With regarding liquefied sand as power-law non-Newtonian fluid, the method of volume of fluid (VOF) in computational fluid dynamics is adopted to conduct numerical computation about the flow push pile of post-liquefied sand. This paper analyzes the effect of consistency coefficient K and flow index n of power-law fluid on flow push pile characteristics. The results show that, this method can factually reproduce the flow deformation shape of post-liquefied sand; The displacement and stress of pile at different height both show the development law of the first increases rapidly and then gradually decreases. The variation trend of peak displacement and peak stress response of pile are significantly different along the pile. The peak displacement response of the foundation pile shows a gradually increasing distribution from the bottom to the top of the pile. The peak stress response of the foundation pile shows the rule of decreasing firstly, then increasing, and finally decreasing from bottom to top. Flow slide push pile effect of liquefied sand is simultaneously affected by the consistency coefficient and flow index. With the increase of the consistency coefficient or the flow index, the peak displacement or peak stress of the pile also increases.