考虑容许纵坡差的软土路堤预抛高预测  

Prediction on Presetting Height of Soft Soil Embankment Based on Allowable Longitudinal Slope Difference

作　　者：张帅 张轩[2] 

机构地区：[1]广州市市政工程设计研究总院,广东广州510000 [2]中交第四航务工程勘察设计院有限公司,广东广州510000

出　　处：《城市道桥与防洪》2016年第7期56-58,10,共3页Urban Roads Bridges & Flood Control

摘　　要：预抛高在公路工程中的应用已越来越广泛。针对目前规范对预抛高在软土路堤处置设计标准不明确的情况,利用固结理论研究了路基填土过程中的受力和变形特性。依据容许纵坡值定义,针对不同软土厚度、路堤填筑高度和工后沉降稳定时间,通过施工过程加载沉降量推算预抛高值,导出了路堤预抛高计算公式。结合工程实例,将计算后的工后沉降、预抛高量进行了比较分析。该方法可以用于一般路段的预抛高预测。Presetting height has been more and more widely used in highway engineering. In view of the present specification of no clear presetting height in the soft soil embankment treatment design standard, the consolidation theory is used to study the stress and deformation characteristics in the filling process of embankment. According to the definition of allowable longitudinal slope value, aiming at the different thicknesses of soft soil, filling heights of embankment and stability time of post-construction settlement,through the construction process of loading settlement, the presetting height value can be calculated, and the calculation formula of embankment presetting height is derived. Combined with engineering cases, the article compares and analyzes the calculated post-construction settlement and presetting height. This method can be used in the presetting height prediction of general road sections.

关 键 词：预抛高 路堤 灰色理论 软土 

分 类 号：U416.1[交通运输工程—道路与铁道工程]