SEM照片孔隙参数提取技术研究

扫描电镜技术对岩土体微观结构的分析起着越来越重要的作用,从SEM照片中获得定量化的信息参数是众多岩土工程研究者关注的问题。本文以湖南省郴州市王仙岭的黏性土SEM照片的二维和三维分析方法为例来说明SEM照片孔隙参数的提取,并对这两种方法所得结果进行分析比较,结果表明:通常采用的二维及三维分析方法所求得的孔隙率参数值往往偏大;在二维方法中合理选择分割阈值是孔隙率提取的关键,过大过小的阈值都会导致较大的误差;三维方法中需要考虑实际的颗粒形态而不能简单地按照像素值进行三维高程建模。

Study on Using SEM Photos to Obtain the Pore Parameters of Soil Samples

Scanning electron microscopy plays an increasingly important role in analyzing the rock microstructure,and how to obtain quantitative information from the SEM photos is concerned by many scholars.The key to two-dimensional approach is the image segmentation,and three-dimensional method is to use three-dimensional GIS of digital elevation model to extract the parameters.Both of them have some limitations.Using the SEM photos of the clay from Wangxianling of Chenzhou City as an example,this paper illustrates ...