摘要
目的基于灰色系统理论,研究钻孔灌注桩荷载-沉降关系曲线特征,提出结合工程实际的改进方法.方法以灰色系统理论GM(1,1)模型对灌注桩荷载-沉降关系曲线的原始拟合结果为基础,根据误差分析对结果进行修改,将改进方法应用于完整试桩曲线的拟合,以及加载未达到破坏的不完整试桩曲线的预测.将预测结果与桩基规范中经验公式计算结果进行对比.结果修改后拟合结果与实测值的误差明显减小,改进方法对不完整试桩曲线的预测结果与经验公式计算所得结果差距在10%以内.结论修改后的灰色系统理论GM(1,1)模型对试桩曲线拟合及预测结果精度均较高,具有一定的工程实用价值.
Based on the grey system theory, a study of load-settlement curves ot bored p^les was cameo on; an improved method combined with engineering facts was put forward in this paper. Modification was built on the original fitting results of load-settlement curves of bored piles, which were predicted by grey system theory GM（ 1,1 ）model,and error analysis. The improved method was applied on the complete and incomplete curves of pile loading tests. And the results calculated by empirical equations or methods in technical code for building pile foundations were compared with the prediction results. The error between the revised fitting results and the measured results was decreased. The prediction results and calculation results gap is within 10%. The modified method had obvious advantages in predicting complete and incomplete curves of pile load-settlement relationship. This improved theory had certain practical value to engineering practice.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2013年第2期270-276,共7页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(50978182)
关键词
灰色系统理论
改进GM(1
1)模型
单桩极限承载力
沉降
预测
gray system theory
improved GM （ 1,1 ） model
ultimate bearing capacity of single pile
settle-ment
prediction
