(1 重庆大学土木工程学院  400045;2 贵州大学土木建筑工程学院  贵阳 550003)
【提要】  数值模拟的结果显示，刚度较弱的岩层地基上的扩展式独立基础，其基底反力分布的非线性特征非常显著，基底反力在基础边缘较集中。假定基底反力为均匀或线性分布来分析基础结构的受力情况，结果会与岩基上扩展基础的实际工作状态有较大的差异，可能使基础处于偏不安全的工作状态。
【关键词】  岩层地基  扩展基础  基底反力  数值模拟
Analysis on Reaction Pressures Distribution of Expansive Isolated Foundation on Weak Batholite/Zhu Aijun1,Huang Zhihong2,Cai Changan2,Yang Shizhong2(1 College of Civil Engineering,Chongqing University,Chongqing 400045,China;2 College of Civil ngineering,Guizhou University of Technology,Guiyang 550003,China)
Abstract:The pressures beneath spread foundation submit to nonlinear distribution ormally.The result of numerical analysis shows that,for the spread foundation on weak rock foundation,the distribution of pressures beneath foundation is high nonlinear and most of the pressures centralize in edge.The foundation may be unsafe if the calculation results with traditional method based on the assumption of the linear distribution of the pressure are used in design.
Keywords:rock foundation;spread foundation;pressure beneath foundation;numerical simulation