关键词: 软土, 扰动状态概念, 压缩变形, 扰动状态模型

Abstract:

One-dimensional compressive structural deformation properties of disturbed and remolded soft soil samples in Zhangzhou and Dongguan are analyzed based on the disturbed state concept theory. The compression curve of the remolded sample is restored to the original state. The soil can be taken as a mixture of two constituent parts in the relative intact and fully adjusted states. By defining undisturbed sample in the relative intact state expressed by elastic model, remolded sample in the fully adjusted state expressed by modified cambridge model and the disturbance function having a good power function with logarithm load, the disturbed state model of stress-strain relationship is suggested. The reasonability of this model has been verified by compression test data. The results show that it is easy to determine the parameters and the model is suitable to describe compressive deformation properties of soft soil,which can provide a reference for the settlement analysis of soft soil foundation engineering.

Key words: soft soil, disturbed state concept, compressive deformation, disturbed state model