多层地基中PCC水平荷载桩的数值解  

Numerical solution of laterally loaded cast-in-place concrete large diameter pipe pile installed in multi-layered soil

作　　者：张建伟[1,2] 刘汉龙[2,3] 

机构地区：[1]河南大学土木建筑学院,开封475004 [2]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098 [3]河海大学岩土工程科学研究所,南京210098

出　　处：《岩土力学》2010年第5期1638-1644,共7页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No.50778063,No.50679017);江苏省“333高层次人才培养工程”基金资助

摘　　要：针对目前多层地基中水平荷载桩计算方法存在的问题,提出了一种基于弹性力学理论,根据桩-土应力应变关系,借助于变分原理和最小势能原理导出桩身位移控制方程,利用有限差分法对方程进行解答的方法,并编制了全桩位移和内力计算程序。算例结果表明,该方法分别同试验结果和有限元计算结果吻合较好,较现行地基系数法具有较高的计算精度和计算效率,对现浇混凝土大直径水平荷载管桩(PCC)的设计计算和分析具有一定的指导意义。Aimed at problems lying in the exiting methods for calculation of laterally loaded piles installed in multi-layered soils,the method based on elastic theory and the stress-strain relationship of the pile-soil,the variation equation are obtained using the principle of minimum potential energy,the variation equations are solved analytically using the method of initial parameters.The computations and post processing for displacement and internal forces of PCC were programmed.It is shown by computation and comparison of model test that the calculated results by the method coincided very well.Meanwhile,the method is more precise and efficient than the existing conversion methods of subgrade modulus.Therefore,it could be useful for the design and analysis of PCC under lateral load.

关 键 词：PCC桩 水平荷载 多层地基 变分原理 有限差分法 

分 类 号：TU472[建筑科学—结构工程]