摘要
在深入研究水平受荷桩桩土相互作用的基础上,引入Pasternak双参数模型,并考虑桩顶水平位移较大时,桩侧土体进入屈服状态的情况,基于桩身微分单元导出了桩身水平挠曲的控制微分方程,并给出了桩身水平挠曲的解析解答,在此基础上提出了考虑土体应力扩散与变形非线性的水平受荷桩桩身挠曲计算方法。采用某工程桩的数值模拟结果对此方法进行了验证,表明了此方法的正确性,同时运用本方法,分析了考虑土体屈服及土体侧向剪切刚度对桩身水平位移与桩身弯矩的影响,并得到了一些有益的规律。
Considering the analysis of characteristics of friction resistance on the interface between pile and soil,the governing equation of the lateral deflection of the pile is deduced from the differential units,through which the Pasternak double-parameter model and the yielding of the soil when large displacement occurs at the top of the pile. Then,the solution of the governing equation mentioned above is given. What is more,the method which takes the stress dispersion and the non-linear displacement is finally introduced so that to calculate the lateral deflection of the pile. In addition,a numeral simulation of a pile in situ is used to validate the method shown in this paper. The impact of the yielding and the lateral stiffness of the soil on the lateral deflection and the bending moment is also discussed.
出处
《公路工程》
北大核心
2015年第3期230-233,269,共5页
Highway Engineering
基金
湖南省教育厅资助科研项目(13C269)
