带沉渣单桩荷载-沉降曲线的数学描述  

Mathematical Description of the Settling Curve of Single Pile with Grain Spillage

作　　者：梅国雄[1] 陈健 宰金珉[3] 

机构地区：[1]南京工业大学交通学院,南京210009 [2]华润置地(南通)有限公司,南通226000 [3]南京工业大学土木学院,南京210009

出　　处：《土木建筑与环境工程》2013年第2期28-32,共5页Journal of Civil,Architectural & Environment Engineering

基　　金：国家自然科学基金(50608038)

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,将桩的荷载-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,得出满足极限荷载定义的"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。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 well.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 result of the indoor single pile modeling,it is found that this parameter computing method is practical,which provides another method to predict the limit load and settlement of the single pile with grain spillage.

关 键 词：带沉渣 单桩 极限承载力 最优化分析 

分 类 号：TU473.1[建筑科学—结构工程]