武汉粘土修正剑桥模型参数研究

为解决修正剑桥模型应用中正常固结线与临界状态线拟合出的对数硬化模量λ不一致问题，基于修正剑桥模型的基本框架，通过三轴压缩等一系列试验，得到了武汉粘土的临界状态有效应力比M、等向膨胀指数k和弹性剪切模量G，在修正剑桥模型框架内对λ与有效平均正应力P的关系进行了探讨，从正常固结线与临界状态线的概念出发推导了λ与P的关系表达式，从而将二者统一起来，通过数值模拟验证了模型参数的合理性与有效性，为武汉地区修正剑桥模型的应用提供了参考。

Research on Parameters of Modified Cam Clay for Wuhan Clay

In order to solve the problem of the fitting result of logarithmic hardening modulus from normal consolidation line disagreement with that from critical state line in practice,based on the framework of Modified Cam Clay,the consolidated-drained triaxial compression tests and hydrostatic compression tests for Wuhan clay were carried out,the critical state ratio,the isotropic swelling index and the elastic shear modulus were obtained.The relationship between logarithmic hardening modulus and mean effective stress was acquired by deduction from the concept of normal consolidation line and critical state line in the framework of Modified Cam Clay,which unified the two lines.The rationality and validity of the model parameters were shown in the numerical simulation,which provided a reference for the application of Modified Cam Clay in Wuhan area.