2016年11月下 施工技术 第45卷第22期 CONSTRUCTION TECHNOLOGY 95 D0I:10.7672/5js2016220095 带桩帽的刚性桩复合地基受力性能研究* 刘明泉12，李晓芝，刘春原2 (1.唐山学院土木工程学院，河北唐山063000；2.河北工业大学土木工程学院天津300401) [摘要]针对沿海公路改造工程中遇到的困难，提出带桩帽的刚性桩复合地基概念.根据实际工程项目，采用 ABAQUS有限元分析软件，建立分析模型.分析了带桩帽的刚性桩复合地基中，桩土应力比、桩身轴力、桩身侧摩 阻力和路基、地基中的竖向应力分布情况.研究结果表明，由于桩帽的存在，能大大减小桩顶的应力集中，带帽刚 性桩的承载力比单桩有所提高.但其侧摩阻力曲线存在中性点，与刚性桩有所区别. [关键词]复合地基；刚性柱；柱帽；桩身轴力；侧摩阻力 [中图分类号]TU473 [文献标识码]A [文章编号]1002-8498(2016)22-0095-04 Mechanical Properties Study of Capped Rigid Pile Composite Foundation Liu Mingquan'.2 Li Xiaozhi' Liu Chunyuan2 (1.School of Civil Engineering Tangshan Unirersity Tangshan Hebei 063000 China; 2.School of Civil Engineering Hebei University of Technology Tianjin 300401 China Abstract:Aimed at the difficulties encountered in the reconstruction project of the coastal highway the concept of capped rigid pile posite foundation is presented.According to the actual project the analysis model is established by using the ABAQUS finite element analysis software.The stress ratio of pile to soil the axial force of pile the lateral frictional resistance of pile and the vertical stress distribution in the subgrade and foundation are analyzed.The research result shows that capped rigid pile can greatly reduce the stress concentration in posite foundation and the bearing capacity of capped rigid pile is improved greater than that of single pile because of the existence of a pile cap.But the lateral friction resistance curve exists neutral point which is different...
带桩帽的刚性桩复合地基受力性能研究.pdf
