基于流固耦合模型对京沪高速公路改扩建拓宽路基差异沉降控制标准的研究

Study on Control Criterion of Subgrade Differential Settlement for Widening of Jing-hu Expressway Based on the Fluid-solid Coupling Model

对高速公路改扩建差异沉降标准进行研究,通过对既有道路观测数据分析,利用流固耦合模型对拼宽路基进行数值模拟,分析了新老路基差异沉降特性,提出京沪高速公路差异沉降控制标准:工后沉降不超过5cm,总沉降量不超过15cm,路拱横坡度增大值应不大于0.5%。

The control criterion of differential settlement for expressway widening is studied,by analyzing on the deformation data of old embankment,the article uses the fluid-solid coupling model to stimulate the new widening embankment.Analyze the deformation characteristic of new and old embankment,and present the control criterion of subgrade differential settlement for widening of Jing-hu expressway:the maximum settlement after construction for the widened embankment should be less than 5cm;the total settlement for the widened embankment should be less than 15cm;the maximum transverse gradient variation should be less than 0.5%.