桩身刚度对承载性能的影响分析  

The Analysis of the Rigidity Influencing on Bearing Capacity of Pile

作　　者：孔德志[1] 李俊南[1] 位俊俊[2] 

机构地区：[1]河南大学材料与结构研究所 [2]湖南城建职业技术学院

出　　处：《河南大学学报（自然科学版）》2017年第1期97-100,共4页Journal of Henan University:Natural Science

基　　金：国家自然科学基金资助项目(51508163);河南省科技攻关计划项目(142102210391)

摘　　要：建立了超长单桩有限元分析模型,采用有限元方法分析了超长桩在不同刚度条件下桩顶位移与桩顶反力之间的关系,并分析桩侧摩阻力随深度的变化规律及单桩承载力情况.分析结果表明:增大桩身刚度能够使桩身下部侧摩阻力得到有效发挥,从而提高单桩承载能力.但在桩身刚度增大到一定程度时,继续增大桩身刚度对单桩承载能力的提高将趋于稳定.并提出了在条件允许时可通过提高桩身刚度改善桩的承载性能的工程建议.In this paper,a single super-long pile finite element model has been found.The relationship curves between the top load and settlement under different rigidities of the pile have been analyzed by the finite element method.The orderliness of side friction resistance and the bearing capacity of pile have also been analyzed.The analysis result shows that the side friction resistance at the lower depth of the pile can be exerted effectively and the bearing capacity of the pile can be improved by increasing the rigidity of the pile.But when the rigidity of the pile is increased to a certain value,the bearing capacity of the pile is improved very little by increasing the rigidity of the pile continually.It has been advised that the bearing capacity of pile can be improved by increasing the rigidity when the condition is allowed.

关 键 词：桩顶荷载 弹性模量 侧摩阻力 单桩承载力 

分 类 号：TU473.12[建筑科学—结构工程]