软基高路堤变形与破坏机理

Mechanics of Deformation and Destruction of High Embankment on Soft Soil Subgrade

通过数值分析的方法模拟计算了不同填土高度、不同填筑速率、不同软基厚度以及不同边坡比例构成工况条件下路堤边坡变形与稳定安全系数的变化规律,揭示了软土地基上高填方路堤变形与失稳破坏的关系:路堤及地基的变形与破坏是相互关联的,路堤出现整体滑动破坏往往伴随大变形。最后,通过对实际工程中的软基高填方路堤进行分析计算,证明采用合适的处治方法控制路基不均匀沉降变形就可以有效提高路堤边坡的稳定安全性。

A method of numerical analysis is used to simulate and calculate the change law of embankment slope deformation and stability safety coefficient in condition of different filling heights, the different filling velocities, the different soft subgrade thicknesses and the different slope proportions. The article introduces the relationship of deformation and unstable destruction of high filling embankment on soft soil subgrade. The deformation and destruction of embankment and subgrade are interconnected. The integrated slipping destruction of embankment is often followed with the great deformation. According to the analysis and calculation of soft subgrade high filling embankment in the practical projects, the result shows that the use of suitable treatment method to control the uneven settlement and deformation of subgrade can efficiently improve the stability and safety of embankment slope.