中文摘要：

采用数值方法分析软基上的海堤沉降问题时，模型参数的确定是数值分析的重要内容之一。结合东海大桥港桥连接段的海堤工程数据，对修正剑桥模型在海堤沉降计算中的参数灵敏度进行分析。结果表明，初始压缩曲线的斜率λ和破坏曲线的斜率M对海堤沉降的影响最大，当λ和M的取值在±20％范围内波动时，沉降的变化率也会在大概±20％的范围内变化；而回弹斜率κ，渗透系数k，泊松比v和截距ea对海堤沉降的影响非常小，当这些参数在±20％范围内波动时，最终沉降的变化率只有±1％左右；另外，渗透系数k虽然不能改变最终沉降，但是却能对地基的固结性状产生较大的影响。所以为了能准确分析海堤沉降问题，在参数取值中，应当注意提高λ，M和k的精度。

英文摘要：

It is one of the most important steps in determining the value of model parameters in the analysis of the seawall settlement on the soft ground by numerical methods. Combining the seawall engineering data of the Donghai bridge, we analyze the parameter sensitivity of the modified Cambridge model in the calculation of seawall settlement. The resuhs show that the slope of the initial compression curve 2 and the slope of the failure curve Mhave the greatest influence on the seawall settlement. When the values of λ and Mfluctuate in the range of ±20%, the changing rate of settlement also fluctuates in the range of ± 20% .While the rebound slope κ, permeability coefficient k, Poisson＇s ratio v and intercept ea have very little influence on seawall settlement. When these parameters fluctuate in the range of ±20%, the changing rate of final settlement only fluctuates in the range of ±1%. Besides, although permeability coefficient k can＇t influence the final settlement, it has a great influence on the consolidation behavior of the foundation. As a result, in order to analyze the problem of seawall settlement more accurately, more attention should be paid on the values of λ, M and k.