一种水泥土非线性应力-应变关系研究

Study on a non-linear stress-strain relationship of cemented soils

为研究水泥土的力学性能,建立了一种用分段连续函数表示水泥土非线性应力-应变关系的数学模型.给出了确定模型参数的方法,讨论了模型参数的影响因素.最后,给出了水泥土模量的表达式,验证了所提出的水泥土非线性应力-应变关系的适用性,所提出的水泥土非线性应力-应变关系可用于水泥土桩复合地基性能分析.

Cement stabilized soil is an important type of composite foundation. Some published experimental data of cemented soils are summarized to study the mechanical behavior of cemented soils. Data show that the stressstrain relationship of cemented soils exhibits a feature of post-peak softening. A new mathematical model regarding the stress-strain relationship of cemented soils expressed in piecewise continuous function is established. Method to determine model parameters is also given to discuss the influencing factors of model parameters. The expressions of cemented soil moduli are proposed. Model of nonlinear stress-strain relationship of cemented soils is proved to be suitable and can be applied in further study of composite foundation stabilized by cement.