论文部分内容阅读
为研究膨胀土非线性流变,取水泥改良膨胀土样进行长期一维压缩试验,得到了改良膨胀土在不同应力水平下的应力-应变等时曲线簇。将曲线反映的非线性流变分解为线性黏弹性蠕变变形、线性黏塑性蠕变变形和非线性黏塑性蠕变变形三部分。基于模型理论和遗传蠕变理论建立了各部分流变模型,其中在线性黏弹性蠕变变形和线性黏塑性蠕变变形部分采用模型理论建立元件模型,在非线性黏塑性蠕变变形部分运用遗传蠕变理论建立积分蠕变方程,结合试验数据拟合出材料和方程参数,用该模型得到的蠕变曲线与实测结果能较好吻合。
In order to study the nonlinear rheology of expansive soil, long-term one-dimensional compressive tests were conducted by taking the cement-soil expansive soil samples. The stress-strain isochronal curves of the expansive soil under different stress levels were obtained. The nonlinear rheological curve is decomposed into three parts: linear viscoelastic creep deformation, linear visco-plastic creep deformation and non-linear viscoplastic creep deformation. Based on the model theory and the theory of genetic creep, the rheological model of each part was established, in which the component model was established by using the model theory in the linear viscoelastic creep deformation and the linear visco-plastic creep deformation. The nonlinear visco-elastic creep deformation Creep theory to establish integral creep equation, combined with experimental data to fit the material and equation parameters, the creep curve obtained with the model can be in good agreement with the measured results.