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高填石路堤的变形受到填石路堤高度、坡度、填石材料性质、水文地质条件、施工方法等多种因素的影响。如果控制不当,会导致路堤失稳、不均匀沉降等病害的发生,从而影响到路堤的使用性能。沪蓉西高速公路高填石路堤填筑高度达64.375m。其高度之大,地形地质条件之复杂都是前所未有的。为了了解该填石路堤在自重作用下的变形特征,从而采取相应的工程措施提供指导,应用大型通用有限元分析软件ABAQUS,基于线弹性模型理论,选择典型断面分析了该路堤在自重作用下的不同模量时受力和变形规律。结果表明:(1)路堤强度越大,表面横向变形和垂直变形越小,变形模量越小,横向变形差异和不均匀沉降越大。(2)在竖直方向也存在横向变形和不均匀沉降差异,这种差异随着深度的增加而减小。(3)对有关部位必须采取相应的工程措施和施工措施,确保路堤稳定性和减少沉降、差异沉降。
The deformation of high embankment is influenced by many factors such as embankment height, slope, nature of rockfill material, hydrogeological conditions, construction method and so on. If not properly controlled, it will lead to instability of the embankment and uneven settlement, which will affect the serviceability of the embankment. Shanghai-Chengdu Expressway high embankment filling height of 64.375m. Its height, terrain and geological conditions are more complex than ever. In order to understand the deformation characteristics of the embankment under the action of self-weight, the corresponding engineering measures were taken to provide guidance. Based on the linear elastic model theory, a large general finite element analysis software ABAQUS was used to analyze the typical section of the embankment. Different modulus of stress and deformation laws. The results show that: (1) The greater the embankment strength is, the smaller the transverse and vertical deformations of the embankment are, and the smaller the deformation modulus is, the greater the difference of lateral deformation and the uneven settlement are. (2) Lateral deformation and uneven settlement also exist in the vertical direction, and this difference decreases with the increase of depth. (3) The relevant parts must take corresponding engineering measures and construction measures to ensure the stability of the embankment and reduce the settlement and differential settlement.