分级组合模型在泥岩路基沉降预测上的应用分析

Application of hierarchical combination model in settlement predictiom of mudstone subgrade

随着高速公路在泥岩地区的大规模兴建,使得深入研究泥岩路基稳定性能显得尤为重要。针对目前双曲线、指数曲线和对数曲线模型对沉降预测范围的局限性,根据3种单一模型在不同时刻的误差大小,分级分配不同模型在沉降预测过程中所占的比重,提出了一种能综合3种单一模型预测特点,适用于泥岩路基工后沉降全过程的分级组合模型。工程实例表明该组合模型预测曲线与实测曲线吻合度高,在工程应用方面具有一定的参考和使用价值。

With the large-scale construction of expressway in mudstone area,it is very important to study the stability of mudstone subgrade.In view of the limitation of the current hyperbolic,exponential and logarithmic curve models to the settlement prediction range,according to the error of three single models at different time,different models have different proportion in the process of settlement prediction,and a combined model which can synthesize the characteristics of three single models is put forward.The engineering examples show that the prediction curve of the combined model is in good agreement with the measured curve,and it has certain reference and use value in engineering application.