摘要
工后沉降是软土地区修建高速公路面临的主要问题。依据现场实测典型沉降-时间关系特性,基于Taylor展开原理提出软基沉降预测分析的幂多项式模型;通过相关公式推导获得参数求解方法,并对实测数据点数目的合理取值进行分析。结合广东省某高速公路软基现场监测结果,运用幂多项式模型对实测数据予以预测分析。研究结果表明:幂多项式模型可充分利用观测样本求解参数,采用较低阶数即可获得较高精度,从而更准确地反映软基工后沉降特征。
Post-construction settlement is one of the main issues for expressway construction in soft soil areas.Based on the characteristics of a typical settlement-time relationship,a power-polynomial model from Taylor series expression is proposed for prediction and analysis of the post-construction settlement on soft ground.The model parameters are obtained and the in-situ test data analyzed.With the field monitored settlement at a expressway in Guangdong,the power-polynomial model is applied to predict the settlement according to the in-situ data.The results show that the parameters of the power-polynomial model can be determined simply by using the in-situ data,the prediction have high precision,and the post-construction settlement on soft ground can be described.
出处
《科学技术与工程》
2010年第31期7837-7840,共4页
Science Technology and Engineering
关键词
高速公路
软基
幂多项式模型
沉降预测
expressway soft ground power-polynomial model settlement prediction
