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常规剑桥模型和修正剑桥模型是以正常固结和弱超固结土的三轴试验现象为基础建立起来的,且试样的初始应力状态为各向等压的球应力状态,将模型应用于K0固结状态的原状土必然引起不可忽略的系统误差。基于原状土K0固结线与等倾线之间的关系,在常规剑桥模型的基础上推导并得到了基于K0线的原状土剑桥模型和修正剑桥模型。在主应力空间中,该模型以K0固结线而不是以等倾线为轴线,因而能反映原状土的结构性和各向异性。既有试验数据的验证表明,与常规剑桥模型和修正剑桥模型相比,该模型能更合理的描述原状土的屈服和强度特性。
The conventional Cambridge model and the modified Cambridge model are based on the triaxial tests of normal and weakly overconsolidated soils, and the initial stress state of the specimen is the isotropic isotropic ball stress state. The model is applied to K0 consolidation of the original state of the soil will inevitably lead to not be neglected system error. Based on the relationship between undisturbed K0 consolidation line and isocline, based on the conventional Cambridge model, the undisturbed Cambridge model and the modified Cambridge model based on the K0 line are derived and obtained. In the main stress space, the model is based on the K0 consolidation line rather than the isometric line, thus reflecting the structure and anisotropy of the undisturbed soil. The verification of existing experimental data shows that this model can describe the yield and strength characteristics of undisturbed soil more reasonably than conventional Cambridge model and modified Cambridge model.