摘要
对存在深厚软土的地基,耦合软土流变项指数曲线模型可较好地预测地基沉降,可合理地反应出土颗粒骨架的蠕变过程及各时刻的蠕变量。基于加载卸载的应力应变关系,对耦合软土流变项指数曲线模型进行改进,并采用数学规划中的黄金分割法对模型中参数进行反演。结合工程实测数据与有限元仿真模拟,表明该模型对加载卸载沉降预测具有较高的适应性,对超载预压路基长期沉降预测有参考价值。
For the foundation of existing deep soft soil,rheological model of the index curve on coupled soft soil can preferably forecasts the foundation settlement and reasonably reflects creep and the amount of creep for each moment on the soil particle skeleton. Based on the stress-strain relationship of loading and unloading,we improve the model and inverse the model parameters by Golden-section methods of the mathematical programming. Combined measured data with engineering and FEM simulation,the results show that it has high adaptability for settlement prediction of the loading and unloading,which has a certain reference value for long-term settlement prediction in surcharge preloading embankment.
出处
《现代交通技术》
2010年第2期20-23,共4页
Modern Transportation Technology
关键词
高速公路
沉降预测
黄金分割法
有限元
expressway
settlement prediction
golden-section
finite element method
