土壤中裂隙与其它类型孔隙结构差异的图像比较

Image comparison on structures between cracks and other types of pores

裂隙是孔隙的一类。文章利用土壤切片的数字图像,采用目视分离的方法,比较研究了裂隙与其它类型的孔隙在结构上的差异、选择的土样研究结果表明,目视分离裂隙的方法是可行的,土体中的裂隙直径分布曲线是不规则的,而其它类型的孔隙直径分布曲线则类似对数正态分布;土壤总孔隙中直径较大的部分主要由裂隙构成,直径较小的部分则由其它类型孔隙和裂隙共同构成;土壤表面裂隙与土体内部裂隙在结构上可能具有一定差异。

Crack is defined as one type of pores. In this paper, visual separation method was used to separate cracks from other types of pores in the digital images of soil sections, and the structural differences between cracks and other types of pores were also studied. The results obtained from the selected soil samples showed that, visual separation method is reliable; crack size distribution is irregular while pore size distribution is similar to log normal distribution; in the total pores, the larger size parts are mainly constituted by cracks and the smaller size parts are co-constituted by other types of pores and cracks; there are possible differences between the surface cracks and internal cracks of soils.