郑泓, 李萍, 包健, 李同录. 2016: 粒度组成与结构性对非饱和黄土基质吸力的影响研究. 工程地质学报, 24(s1): 1238-1242. DOI: 10.13544/j.cnki.jeg.2016.s1.180
    引用本文: 郑泓, 李萍, 包健, 李同录. 2016: 粒度组成与结构性对非饱和黄土基质吸力的影响研究. 工程地质学报, 24(s1): 1238-1242. DOI: 10.13544/j.cnki.jeg.2016.s1.180
    ZHENG Hong, LI Ping, BAO Jian, LI Tonglu. 2016: RESEARCH ON THE EFFECT OF GRAIN SIZE COMPOSITION AND STRUCTURE ON THE MATRIC SUCTION OF UNSATURATED LOESS. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 1238-1242. DOI: 10.13544/j.cnki.jeg.2016.s1.180
    Citation: ZHENG Hong, LI Ping, BAO Jian, LI Tonglu. 2016: RESEARCH ON THE EFFECT OF GRAIN SIZE COMPOSITION AND STRUCTURE ON THE MATRIC SUCTION OF UNSATURATED LOESS. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 1238-1242. DOI: 10.13544/j.cnki.jeg.2016.s1.180

    粒度组成与结构性对非饱和黄土基质吸力的影响研究

    RESEARCH ON THE EFFECT OF GRAIN SIZE COMPOSITION AND STRUCTURE ON THE MATRIC SUCTION OF UNSATURATED LOESS

    • 摘要: 为了研究粒度组成与结构性对非饱和黄土基质吸力的影响,取泾阳L5黄土,采用水洗法分选土样,制备原状、重塑、分选细粒和分选粗粒共4个试样,测得其土水特征曲线与粒径密度分布曲线,实验结果表明原状样的结构性增大了黄土的最大孔隙半径,增加了黄土孔隙分布的均匀性,导致SWCC的进气值减小,含水率的快速下降段斜率变缓。去除结构性的土粒粒度组成的密度分布优势峰值对SWCC的进气值具有明显的影响。

       

      Abstract: In order to investigate the effect of grain size composition and structure on the matric suction of unsaturated loess, the washing method is used to measure the SWCC and the particle density distribution curves with the preparation of the original state, remodeling, separation of fine and coarse particle size of a total of four L5 loess samples at Jingyang country. The experimental results show that the structure of the samples of undisturbed loess increases the maximum pore radius, increases the uniformity of the pore distribution of the loess, and leads to the decrease of the Air entry value of SWCC, and the slope inthe rapid descending segment of the water content becomes gradual. The dominant peak value of the density distribution of the soil particle size distribution of the structure has a significant effect on the Air entry value of SWCC.

       

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