岩石地基上扩展基础的受力特性分析

Mechanical Behavior of Spread Foundations on Rock

扩展基础施工简易、造价经济,在工程中应用广泛。但由于岩石地基刚度比基础刚度大、岩石地基变形量小等特点,岩石地基上扩展基础的基底反力和受力特性与土质地基应有所不同。就岩石地基上扩展基础受力特点展开了现场试验和数值计算在内的分析,总结了扩展基础在荷载作用下塑性发展特点及基础高度和配筋率对其影响规律,对比分析了现场试验数据与有限元数值计算结果,指出岩石地基上扩展基础在受力过程具有劈裂破坏特点。结论对岩石地基上扩展基础的设计和研究具有参考意义。

Spread foundations are applied widely in foundation engineering due to their easy,simple construction and low costs.Because the stiffness of the surrounding rock is higher than that of the foundation,the upward pressure and stress response of a foundation in rock are quite different from those of a foundation in soil.Based on site testing and numerical simulation,the mechanical behaviors of spread foundations in rock are discussed in this paper.The influencing factors for foundations in rock are analyzed,in...