新近填土场地构支架桩基配筋优化

通过室内模型试验和ABAQUS建立桩土模型,用不同弹性模量的模型桩模拟不同配筋率的桩基,试验发现桩基弹性模量对桩顶沉降、桩基轴力、侧摩阻力、中性点位置并无较大影响。由行业规范配筋要求与承载力计算公式,确定桩基配筋率与承载力的关系,分析在填土固结与桩顶施加水平荷载的条件下,桩基配筋长度对应力应变规律的影响,提出了关于新近填土场地构支架桩基的配筋优化建议。

Reinforcement Optimization of Structural Support Pile Foundation in Newly Filled Soil Site

The pile-soil model was established by laboratory model test and ABAQUS, and the model piles with different elastic modulus were used to simulate the pile foundation with different reinforcement ratios. It was found that the elastic modulus of the pile foundation had no significant influence on the settlement of the pile top, axial force of the pile foundation, lateral friction resistance and neutral point position. The relationship between the ratio of reinforcement and the bearing capacity of pile foundation is determined by the calculation formula of reinforcement requirement and bearing capacity according to the industry standard. Finally, the influence of the length of reinforcement on the stress-strain law is analyzed under the condition of consolidation of soil filling and horizontal load on pile top and the suggestions on reinforcement optimization for structural support pile foundation in newly filled soil site are put forward.