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为研究陕西省咸阳市扶风地区黄土边坡的稳定性,利用SR-60型双联三轴蠕变仪对非饱和重塑黄土进行了三轴固结排水蠕变试验。试验结果表明,试样含水率、固结围压和偏应力水平对蠕变变形具有明显的影响,表现为当含水率较大、固结围压较小时,蠕变形变量大,蠕变现象明显;当其他条件一定时,在偏应力水平较大条件下,试样变形大,蠕变现象明显。同时,利用Singh-Mitchell模型和修正后的Singh-Mitchell模型对试验数据进行拟合发现,修正后的模型克服了偏应力水平对原始模型模拟精度的限制,拟合精度高,且后期趋势基本吻合,能较好地模拟该地区黄土蠕变过程。
In order to study the stability of loess slopes in Fufeng area, Xianyang City, Shaanxi Province, triaxial consolidation displacement creep tests were carried out on unsaturated remolded loess using SR-60 twin-shaft triaxial creep tester. The experimental results show that the moisture content, the consolidation confining pressure and the deviatoric stress level have a significant effect on the creep deformation. The results show that when the water content is large and the confining confining pressure is small, the creep deformation is large and the creep phenomenon Obviously, when the other conditions are certain, under the condition of large deviatoric stress, the sample deforms greatly and the creep phenomenon is obvious. At the same time, using the Singh-Mitchell model and the modified Singh-Mitchell model to fit the experimental data, the modified model overcomes the limitation of the deviatoric stress level to the simulation accuracy of the original model, and the fitting accuracy is high and the later trend basically agrees , Can better simulate the loess creep process in this area.