岩土工程学报Issue(4)：646-653,8.DOI:10.11779/CJGE201404008
桩筏结构复合地基中筏板受力分析的理论计算模型与试验研究
Theoretical and experimental studies on forces acting on raft of pile-raft composite foundation
摘要
Abstract
At present, some simplified algorithms are still used in the design of pile-raft composite foundation of high-speed railway in China because of the lack of a reasonable formula. But their results can not meet the accuracy requirements. The theoretical solution to the raft is essentially studied. In order to get the analytical solution to the raft of the pile-raft foundation, the acting area of a single pile on the raft is selected as an element for solution. The element is regarded as a Reissner rectangular moderately thick plate with four edges shear free-clamped on the Winkler elastic foundation on piles. During calculation, the basic elasticity equation for Reissner rectangular moderately thick plates is transferred into the Hamiltonian system. By separation of variables in Symplectic geometry and characteristic function, the analytic solutions to the bending problems of the rectangular plates with medium and thick thickness can be obtained, and then the internal force, displacement, counter-force at pile top and pressure between the soils and the piles can be calculated. By comparing the measured values with the present analytical solutions, it is shown that the calculated moment of the raft, axial force and pressure between the soils and the piles agree with the measured values. The proposed method is proved to be reliable and can be adopted for the design of the pile-raft composite foundation.关键词
桩筏结构复合地基/筏板设计计算/Winkler弹性地基/Reissner矩形中厚板Key words
pile-raft composite foundation/raft design/Winkler elastic foundation/Reissner rectangular moderately thick plate分类
建筑与水利引用本文复制引用
陈洪运,马建林,陈红梅,许再良,胡伟明..桩筏结构复合地基中筏板受力分析的理论计算模型与试验研究[J].岩土工程学报,2014,(4):646-653,8.基金项目
铁道部京沪高速铁路科技重大专项项目（2008G032-A）；中央高校基金科研业务费专项资金专题研究项目 （）
