A practical procedure for determining soil parameters when analysing the deformation of peat by finite-element analysis (FEA) using the Cam Clay model is presented. FEA has not been frequently used to predict the deformation of peat soil, even though it can be a powerful prediction tool. The main reason for this is that a practical method for determining parameters has not been established. In this paper, the remarkable correlation between the soil parameters required for FEA using the Cam Clay model and the natural water content (w_n) and ignition loss (L_i) of peat and organic clay is presented. Then, based on this correlation, a flow chart for determining the soil parameters of peat and organic clay is proposed. Using this chart, it is possible to determine soil parameters directly from triaxial compression, oedometer and other detailed tests or to estimate them from w_n, L_i and other physical indexes. A trial embankment on peat soil in Hokkaido, Japan, was also created. FEA was performed on the trial embankment using the proposed procedure for determining the soil parameters. The results of the FEA corresponded to the measured settlement behaviour in the trial embankment with an accuracy in the range −4% to +8%. The FEA results also modelled the measured behaviour of pore water pressure and lateral and vertical displacements in the trial embankment very well.

中文翻译：

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使用 Cam Clay 模型确定用于有限元分析的泥炭土参数

提出了使用 Cam Clay 模型通过有限元分析 (FEA) 分析泥炭变形时确定土壤参数的实用程序。尽管有限元分析是一种强大的预测工具，但它并未经常用于预测泥炭土的变形。其主要原因是尚未建立确定参数的实用方法。本文提出了使用 Cam Clay 模型进行有限元分析所需的土壤参数与泥炭和有机粘土的自然含水量 ( w _n ) 和烧失量 ( Li _{)之间的显着相关性。}然后，基于这种相关性，提出了确定泥炭和有机粘土土壤参数的流程图。使用该图表，可以直接通过三轴压缩、里程计和其他详细测试确定土壤参数，或根据w _n、L _i和其他物理指标估计它们。日本北海道的泥炭土上也建立了试验路堤。使用拟议的确定土壤参数的程序对试验路堤进行有限元分析。FEA 的结果与试验路堤中测量的沉降行为相对应，精度范围为 -4% 至 +8%。有限元分析结果还很好地模拟了试验路堤中孔隙水压力以及横向和垂直位移的测量行为。