基于桩轴力分布函数的单桩承载特性分析  

Analysis of Bearing Characteristics of Single Pile Based on the Axial Force Distribution Function

作　　者：梁金国[1] 丁继辉[2] 刘红超[1] 

机构地区：[1]河北建设勘察研究院有限公司,河北石家庄050031 [2]河北大学建筑工程学院,河北保定071002

出　　处：《岩土工程技术》2015年第6期306-310,323,共6页Geotechnical Engineering Technique

摘　　要：基于桩在竖向荷载作用下截面的轴力随桩的入土深度的增加而衰减规律,提出了桩截面的轴力分布函数表达式,桩截面的轴力分布函数与桩的长径比和端阻分担比有关。应用桩轴力分布函数分析了钻孔灌注桩在竖向荷载作用下的承载特性、桩身荷载传递规律、桩的截面轴力分布规律和桩侧阻力分布规律。通过实测与计算结果的对比分析表明,由桩截面的轴力分布函数计算的桩截面的轴力与实测结果规律一致;基于桩的轴力分布函数确定的不同荷载水平下桩侧阻力随桩的入土深度的分布规律、总侧阻、总端阻与与实测结果较为一致。Based on the attenuation law of the pile axial force with the buried depth of piles under the vertical load,the expression of the axial force distribution function of pile section is proposed and is related to the ratio of the length to diameter ratio of the pile and the Share ratio of the tip.The bearing characteristics,law of load transfer of the pile body,the distribution law of axial force and pile side resistance of the Cast-in-place pile under vertical load are analyzed by the application of the axial force distribution function.The comparison of the measured and calculated results shows that the axial force of the pile section is consistent with the measured results by the axial force distribution function of the pile section,the distribution law of the pile side resistance,the total side resistance and the total tip resistance based on the pile axial force distribution function different load level are consistent with the measured results.

关 键 词：桩轴力分布函数 长径比 端阻分担比 钻孔灌注桩 承载特性 

分 类 号：TU473.11[建筑科学—结构工程]