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根据高速公路路基的变形特点,提出了真空-堆载联合预压法处理软基的三维Biot固结有限元计算模型,将砂井按照实际尺寸划分单元,避免了平面计算方法中的砂井处理的问题,较以往的平面数值方法更接近实际情况。结合修正剑桥模型,对某真空-堆载联合预压试验段进行了计算、分析,结果令人满意。
According to the deformation characteristics of expressway subgrade, a three-dimensional Biot consolidation finite element model of soft foundation treated by vacuum-surcharge combined preloading method is proposed. The sand well is divided into units according to the actual size, which avoids the sand well treatment in the plane calculation method The problem is closer to the actual situation than the previous planar numerical method. Combined with the modified Cambridge model, a vacuum-surcharge combined preloading test section was calculated and analyzed, and the results were satisfactory.