多孔介质粘土颗粒群的粒径分布分形维

多孔介质粘土颗粒的粒径分布分形维数值能较好地反映粘土颗粒的尺度分布和空间填充性能，可用于表征土壤的保水、填充等性能．文中以华南地区部分粘土作为多孔介质研究对象，通过建立适于采用数字显微系统的多孔介质颗粒群粒径分布分形维数值的测定模型，提出了一种计算多孔介质颗粒群粒径分布分形维数的新方法．结果表明，采用该法测定的粘土颗粒群粒径分布分形维介于2．2708～2．9483之间，与采用其他方法测定的结果吻合，说明模型和方法具有较好的准确性和实用性，为土壤质地评价，颗粒填充、流变性能研究等提供了一种新的方法和评价指标．

Fractal Dimension of Size Distribution of Particle Group in Porous Medium Clay

The fractal dimension of size distribution of particles in porous medium clay is a index preferably reflecting the size distribution and space-packing capability of clay particles, which has been used to denote the capabilities of water holding and packing for soil. In this paper, a model that is appropriates for the calculation of fractal dimension with digital micro-analysis is established, and a new method to calculate the fractal dimension is proposed, with some types of clays in South China as the porous medium samples. The results show that the value of fractal dimension obtained by the proposed method ranges from 2. 270 8 to 2. 948 3, which accord with that obtained by others methods. Thus, great correctness and practicability of the proposed model and method are reveled, and a new method and corresponding criterion are presented for the evaluation of soil texture and the investigation into the packing and rheological capabilities, etc.