地基沉降预测模型和方法研究Foundation settlement prediction model and method
章广成,艾传井
ZHANG Guang-cheng1,AI Chuan-jing2(1.Engineering Faculty
摘要(Abstract)：
地基沉降预测是岩土体稳定性研究的一项重要任务。基于邓英尔和Gompertz等已有预测模型的特点,提出一种新的地基沉降预测模型——邓英尔-Gompertz曲线模型,并提出了求解此类模型的新方法——规划求解法,解决多变量非线性方程的极值问题;同时探讨了测量点数目及其所处阶段对预测精度的影响,即:测量点越多预测效果越好。测量点处于发生阶段时预测结果一般偏小;测量点达到发展阶段时预测结果一般偏大;测量点达到成熟阶段时预测结果与预测模型、工程沉降特点有关;测量点达到极限阶段时预测结果符合实际情况。实例分析结果表明:与邓英尔、Gompertz等模型相比,新模型预测的结果更准确。
Foundation settlement prediction is a significant task of rock and soil stability study.Based on the existed models of settlement prediction,a new foundation settlement model and its solution method-constrained optimization are put forward.This method is simple,rapid and accurate.The effect of measured point number and its stage to prediction accuracy is discussed.The more the measured point number is,the better the result predicted is.The result predicted is generally less when the measured point is at initial stage while it is larger at developing stage.The result is related with the characteristic of the model and project.As soon as the point reaches the terminal stage,the result predicted accords with the actual condition.Results show that the prediction result of the new model is more accurate than that of Deng Ying-er model and Gompertz model.
关键词(KeyWords)：
沉降预测;Gompertz曲线;残差;规划求解
settlement prediction;Gompertz curve;remainder;constrained optimization
基金项目(Foundation):
作者(Author):
章广成,艾传井
ZHANG Guang-cheng1,AI Chuan-jing2(1.Engineering Faculty
参考文献(References)：
- [1]宰金珉,梅国雄.全过程的沉降量预测方法研究[J].岩土力学,2000,21(4):322-325.
- [2]宋彦辉,聂德新.基础沉降预测的Verhulst模型[J].岩土力学,2003,21(4):123-126.
- [3]ASAOKO A.Observational procedure of settlement prediction[J].Soils&Foundations,1978,18(4):87-101.
- [4]余闯,刘松玉.路堤沉降预测的Gompertz模型应用研究[J].岩土力学,2005,26(1):82-86.
- [5]朱胜利.由实测沉降曲线推算地基最终沉降量的双曲线法[J].港口工程,1998,8(4):31-33.
- [6]蒋明镜,沈珠江.饱和软土的弹塑性大变形有限元平面固结分析[J].河海大学学报(自然科学版),1998,26(1):73-77.
- [7]陈晓平,白世伟.软土蠕变-固结特性及计算模型研究[J].岩石力学与工程学报,2003,22(2):728-734.
- [8]许永明,许折忠.堤岸沉降预测新方法[J].河海大学学报,2000,28(5):111-113.
- [9]邓英尔,谢和平.全过程沉降预测的新模型与方法[J].岩土力学,2005,26(1):1-4.
- [10]LOW B K,WILSON H T.Reliability analysis using object-orientedconstrained optimization[J].Structural Safety,2000,26(1):69-89.
- [11]艾传井.武汉阳逻-青山地区地基土体沉降特征研究[D].武汉:中国地质大学,2006.
文章评论(Comment)：
|
||||||||||||||||||
|
||||||||||||||||||