新疆某黄土的土水特征及其分形描述

发布时间：2018-05-27 00:32

本文选题：黄土 + 非饱和土　；参考：《中国水利水电科学研究院学报》2017年04期

【摘要】：本研究采用新疆某引水渠道边坡的黄土填料进行土水特征曲线试验,研究压实度和应力水平对土料的土水特征的影响规律。针对试验结果,本研究首先采用经典的van Genuchten模型进行曲线拟合。然后采用分形理论进行土水特征曲线的比较分析。结果表明:(1)随着压实度的增加,土水特征曲线向下移动;随着轴向应力的增加,土水特征曲线也会有所下移;(2)相应于孔隙分布,该土料的土水特征曲线具有明显的分形特性;(3)在相同压实度下,不同应力水平的SWCC分形拟合基本平行。采用本文所述的分形方法,在已知不同应力水平下的孔隙率时,可较为合理的从一个应力水平下的土水特征曲线推求其它应力水平下的土水特征曲线。
[Abstract]:The soil-water characteristic curve test was carried out by using loess filler of a diversion canal slope in Xinjiang to study the influence of compaction degree and stress level on soil-water characteristics of soil material. According to the experimental results, the classical van Genuchten model is used to fit the curve. Then the fractal theory is used to compare and analyze the characteristic curves of soil and water. The results show that with the increase of compaction degree, the characteristic curve of soil and water moves downward, and with the increase of axial stress, the characteristic curve of soil and water also moves down to a certain extent) corresponding to the pore distribution. The soil-water characteristic curve of the soil material has obvious fractal characteristics. Under the same compaction degree, the SWCC fractal fitting of different stress levels is basically parallel. By using the fractal method described in this paper, when the porosity at different stress levels is known, the soil-water characteristic curves at one stress level can be reasonably derived from the soil-water characteristic curves at other stress levels.
【作者单位】：长江科学院水利部岩土力学与工程重点实验室;
【基金】：国家自然科学基金青年基金项目(51509018) 人社部留学人员科技活动择优资助项目(CKSD2016310/YT) 中央级公益性科研院所基本科研业务费项目(CKSF2016272/YT)
【分类号】：TV223

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