江六高速公路桥头过渡段纵向预抛高方案研究

Scheme Analysis of Height with Allowance for Bridgehead Sections of Jiangliu Expressway

江六高速公路在建设过程中由于工期紧张,必须在桥头路段沉降未稳定即进行路面面层施工,按常规方案施工桥台与桥头路段易产生差异沉降,为此文章进行了工后沉降预测,并基于路基纵向沉降的实测数据建立了双曲线和马鞍型曲线沉降模型。通过分析,并结合工程实际特点,提出采用反马鞍型曲线预抛高方式,并在工程中予以实践和验证。

Due to the tight deadlines of the construction process in Jiangliu highway,pavement construction should be carried out before the settlement in the bridge section stabled,which resulting in a longitudinal settlement of the bridgehead roadbed. This article predicted the post-construction settlement,established hyperbolic and saddle-shaped curve settlement models based on the measured data and the longitudinal settlement of the roadbed. Through analysis,and combined with the actual characteristics of the project,anti-saddle-shaped curve is proposed,verified and practiced in engineering.