带沉渣单桩荷载-沉降曲线的数学描述.pdfVIP

学兔兔 第35卷第2期 土木 建 筑与 环 境 工 程 Journal of Civil．Architectural＆ Environmental Engineering Vol|35 No．2 2013年 4月 Apr．2013 doi：10．3969／j．issn．1674—4764．2013．02．005 带沉渣单桩荷载一沉降曲线的数学描述 梅国雄b，陈 健 ，宰金珉 (1．南京工业大学 a．交通学院，b．土木学院，南京 210009；2．华润置地(南通)有限公司，南通 226000) 摘 要：对带沉渣的单桩在竖向静载作用下的沉降曲线进行分析，将桩的荷栽 沉降曲线分为3个 阶段：开始的弹性直线阶段、中间的沉渣压实阶段以及最后的弹塑性破坏阶段，并分别对3个阶段 的沉降特性进行数学描述，总结得出各阶段的数学模型表达式。采用最优化的计算方法进行参数 计算，得出满足极限荷栽定义的“理论极限荷载”计算公式的参数，结合室内单桩模型试验的结果进 行对比，证实本模型的参数计算方法是可行的。 关键词：带沉渣；单桩；极限承载力；最优化分析 中图分类号：TU473．1 文献标志码：A 文章编号：1674-4764(2013)02-0028—05 Mathematical Description of theSettling Curve of Single Pile with Grain Spillage Mei Guoxiong ，Chen Jian。，Zhai J『nm『n (1 a．College of Transportation Science＆ Engineering，l b．College of Civil Engineering，Nanj ing University of Technology， Nanjing 210009，P．R．China；2．China Resources Land(Nantong)Limited Company，Nantong 226000，P．R．China) Abstract：The settling curve of single pile with grain spillage under the effect of vertical static load was analyzed．The curve was divided into 3 parts：elastic line phase at the beginning，grain spillage tamping phase and elasticity breaking phase in the end，and the settling characteristics in three phases were described mathematically and the mathematical expression was concluded as wel1．Based on the calculation of the parameter with the optimizing calculation method，the parameter of“theoretical limit load’’computing formula that satisfies the definition of limit load was presented．Comparing with the experimental resu