季节性冻土路基施工期沉降量预测

以北沙河特大桥小里程端的施工段作为模拟工点，以实际施工过程中所用材料、结构为模拟单元，采用平面应变模型，利用MIDAS数值模拟软件，完成了施工期沉降量模拟分析，取得了满意的效果；提出了分阶段输入材料特征值的全新模拟方法，并给出施工各阶段材料特征值的计算公式；得出施工过程中所用的非冻胀土和A，B组土会带来较大的水平位移和沉降的结论。

Seasonal frozen soil roadbed subsidence quantity forecast in construction period

In the paper,we're taking Beisha river large bridge small course end executes the construction section as simulation object,and the material,the structure in actual construction process as the analogue unit, using the plane strain model and the MIDAS numerical simulation software,which has completed the construction period subsidence quantity simulation analysis and made the satisfactory progress.Proposed the brand-new analogy procedure which puts forward the material characteristic value by stages and give...