海洋软土修正剑桥模型在海堤工程的应用

Application of marine soft soil modified Cambridge model in sea dike project

通过对海洋软土进行一系列的室内物理力学试验及静三轴试验,拟合了海洋软土平均应力和广义剪应力值,认为海洋软土的状态线呈双曲线形,并将修正的应力罗德角考虑在模型之中,进一步改进剑桥模型理论,使其更加适应海洋软土的静力学特性。实践证明,海洋软土修正剑桥模型能有效模拟海洋软土的应力应变特性,表现为海洋软土材料的非线性特征以及塑性流动的特征。采用海洋软土修正剑桥模型对以海洋软土为基础的海堤的地基沉降进行数值分析,计算结果验证了海洋软土修正剑桥模型的适用性。

Based on the physical mechanics experiments and a series of three static triaxial test of marine soft soil,we fit the mean stress and the generalized shear stress value of marine soft soil,consider that state line of marine soft soil is hyperbolic,take the modified Rhodes stress angle into the model,and improve the Cambridge model to make it more responsive to the static characteristics of marine soft soil.The practice shows that the modified Cambridge model of marine soft soil effectively simulates the stress-strain characteristics of marine soft soil,and shows the nonlinear characteristics of the soft soil and the characteristics of the plastic flow.Based on the modified Cambridge model of marine soft soil,we numerically analyze the foundation settlement of sea dike project based on marine soft soil,and verify the applicability of the modified Cambridge model of marine soft soil by the calculation result.