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通过定量分析固结人工土的微观结构,研究非黏土矿物与黏土矿物对土体微观结构(颗粒和孔隙)变化的影响。经ESEM图片比对分析后发现:非黏土矿物长石试样颗粒较大,粒间大多以面-面连接,结构较致密,加载后,大颗粒碎散成小颗粒,颗粒平均粒径减小,圆形度提高,颗粒定向性变化较大而其分布分维数呈现下降趋势;黏土矿物高岭土试样颗粒较小,粒间大多以边-边、边-面连接,孔隙较多,加载后,团聚现象明显致使颗粒平均粒径增大,圆形度降低,孔隙也逐渐向团聚单元体内部孔隙转变,在加载初期(p<100 kPa),颗粒与孔隙的定向概率熵与分布分维数均明显下降,之后趋于稳定。
By quantitatively analyzing the microstructure of consolidated artificial soil, the effects of non-clay minerals and clay minerals on the changes of soil micro-structure (particles and pores) were studied. ESEM picture comparison analysis showed that: non-clay mineral feldspar sample larger particles, most of the grain surface to surface connection, the structure is more compact, after loading, large particles broken into small particles, the average particle size decreases , The degree of circularity increases, the particle orientation changes greatly and the fractal dimension of the distribution presents a declining trend. The clay mineral kaolin sample particles are smaller, the interparticle boundaries are mostly connected by edge-edge, edge-face, and more pores. After loading , The agglomeration obviously led to the increase of the average particle size and the decrease of the circularity. The pores also gradually changed into the pores in the agglomeration unit. At the initial stage of loading (p <100 kPa), the directional probability entropy and distribution fractal dimension of the particles and pores Decreased significantly, then stabilized.