Numerical Simulation Of Reinforced Cement Soil Pile With Multi-plates Used As Anti-floating Pile

With the development of urbanism, the problem of anti-float of underground structures has become increasingly serious and it has also increasingly higher demand on the anti-pulling bearing capacity of pile foundation. On account of Pile with multi-plates’ unique structure, it relative to the traditional pile with constant section has higher anti-pulling bearing capacity and smaller uplift displacement. Pile with multi-plates is applied as compressive pile in industrial and civil architecture. The study of pile with multi-plates is concentrate on the experimental research of bearing capacity and engineering application. Pile shaft material has important influence to bearing capacity of single pile with multi-plates. There are differences between the anti-pulling bearing capacity of foundation pile and the single pile under vertical load considering interaction between piles and other factors. Based on the achievements have been acquired, the paper analyze the anti-pulling performance of pile with multi-plates by experimental and numerical methods. The main research contents include;Firstly, by establish the 3-dimension finite element model of reinforced cement soil pile with multi-plates with the Plaxis 3D Foundation software, analyzes the anti-pulling performance and mechanism of reinforced cement soil pile with multi-plates. The results showed that the anti-pulling bearing capacity of pile with multi-plates mainly depends on the plate resistance and the foot plate bears the most of load.Secondly, pile rigidity, the number of plates and position of plates affect displacement of pile under pulling loading. Optimizing adjustment of pile with multi-plates can provide evidence for reasonable design.Thirdly, establish the 3-dimension model of pile group and the interaction between piles are considered. The influence of pile amount, pile spacing and the ratio of width to thickness of pile cap to group piles vertical displacement under uplift loading are analyzed. The smaller pile spacing, the bigger the soil displacement. Pile amount and pile spacing are the main influencing factors of the anti-pulling bearing capacity of pile-group foundation.