Push pile effect of post-liquefied sand flow slip based on fluid mechanics method
1. Faculty of Civil Engineering and Mechanics， Jiangsu University， Zhenjiang， Jiangsu 212013， China; 2. Architectural Engineering Institute， Jinling Institute of Technology， Nanjing， Jiangsu 211169， China; 3. School of Architecture and Civil Engineering, Jiangsu University of Science and Technology， Zhenjiang， Jiangsu 212005， China
Abstract：Baced on the fluid volume(VOF) method in computational fluid dynamics（CFD）and the finite element method in solid mechanics, the push pile effect of post-liquefied sand flow slip was investigated. The post-liquefied sand was regarded as Newtonian fluid and shear thinning non-Newtonian fluid with single pile regarded as linear elastic structure, and the effects of viscosity, consistency coefficient and flow index on the pushing pile effect were analyzed. The results show that when the post-liquefied sand is regarded as Newtonian fluid, the shorter the distance from the top of pile is, the larger the displacement is, while the shorter the distance from the bottom of pile is, the greater the pile stress becomes. With the increasing of the viscosity of post-liquefied sand, the displacement and the stress of pile are increased, and the gap between the curves is decreased. When the post-liquefied sand is regarded as shear thinning fluid, the response law along the pile body is consistent with that of Newtonian fluid. The changes of consistency coefficient and flow index only affect the pile body displacement and stress magnitude without impact on deformation mode.
2018, Vol. 39 
