桩-筏复合基础的非线性分析与设计

在当前的工程实践中,对复合桩基的处理是按上部荷载全部由桩传到地基中去来对待的,认为承台只起连接桩顶和传递上部荷载的作用。但实际上,上部荷载是由桩、承台和地基三者共同承担的。因此,应用有限元和无限元相结合的方法,对桩筏复合基础进行非线性分析,进一步揭示复合桩基的工作原理具有实际意义和理论价值。将按单桩极限承载力设计复合桩基的新方法运用于工程实例的结果表明,复合桩设计新方法具有明显的优越性。

Non-linear analysis & project of the composite filed raft foundation

Based on the conjunction of both the finite element and the infinite element method,composite file foundation have been analyzed by non-linear approach and the working principle of composite pile foundation have been revealed. With the new method of ultimate designing the composite pile foundation on the basis of ultimate bearing capacity of single file,an example here is amplied. With the contrast of primary method,the merits that need to pay more attention in application have been pointed out.