堆载预压下高速公路软土地基路堤形变量预测研究  

Study on Deformation Prediction of Expressway Embankment on Soft Soil Foundation under Surcharge Preloading

作　　者：吴兴正 Wu Xingzheng(Henan Transportation Planning and Design Institute Co.,Ltd.,Zhengzhou,450000)

机构地区：[1]河南省交通规划设计研究院股份有限公司,郑州450000

出　　处：《建设科技》2021年第22期94-96,共3页Construction Science and Technology

摘　　要：针对堆载预压下高速公路软土地基施工项目,为缩小路堤形变量预测结果与实际测量值之间的误差,开展对其路堤形变量预测研究。通过确定高速公路软土地基路堤形变影响因子、堆载预压下路堤沉降板与分层沉降仪观测、基于双曲线模型的路堤最终形变量推算,提出一种全新的预测方法。通过实例分析证明,新的预测方法在应用到实际堆载预压排水固结法下的高速公路施工项目中,其路堤变形量预测结果与实际形变量相差不超过0.4 mm,具有极高预测精度,可为高速公路工程施工提供高精度数据依据。Aiming at the construction project of expressway soft soil foundation under surcharge preloading,in order to reduce the error between the predicted results and the actual measured values of embankment shape variables,the prediction of embankment shape variables is carried out in this paper.A new prediction method is proposed by determining the influencing factors of embankment deformation on soft soil foundation of expressway,observing the embankment settlement plate and layered settlement instrument under surcharge preloading,and calculating the final shape variable of embankment based on hyperbolic model.The example analysis shows that when the new prediction method is applied to the expressway construction project under the actual surcharge preloading drainage consolidation method,the difference between the prediction result of embankment deformation and the actual shape variable is no more than 0.4 mm,which has very high prediction accuracy and can provide high-precision data basis for expressway engineering construction.

关 键 词：堆载预压 高速公路 软土地基 路堤 形变量 预测 

分 类 号：U418.5[交通运输工程—道路与铁道工程]