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根据比奥特固结理论,应用有限元分析滤垫加固泥炭地基上路堤住固结过程中的应力应变。滤垫采用薄膜元来模拟,滤垫之间以及滤垫与土之间设置接触单元。根据三轴排水试验结果,不均质的泥炭士也大致符合康德纳提出的双曲线关系,与众不同的是参数n明显大于1,表明泥炭土随固结压力的增加很快硬结。地基在固结过程中,渗透系数变化很大,计算时应予考虑。最后将计算结果与实测资料进行了比较。
According to Biot consolidation theory, the finite element analysis filter pad is used to reinforce the stress and strain in the process of consolidation and consolidation of embankments on peat foundation. The filter pad is modeled as a membrane element, with contact elements between the filter pads and between the filter pad and the soil. According to the results of the triaxial drainage test, the heterogeneous peat also roughly conforms to the hyperbolic relationship proposed by Kantner. The difference is that the parameter n is obviously greater than 1, indicating that the peat soil is rapidly cemented with the increase of the consolidation pressure. During consolidation, the permeability coefficient varies greatly, which should be considered when calculating. Finally, the calculated results are compared with the measured data.