摘要
固化污泥微观结构被认为是决定其宏观性质的重要因素,同时SEM图像的灰度值与固化污泥微观分布有紧密的相关关系。本文基于GIS图像理解与解释原理,对掺入不同量水泥作为固化剂污泥的SEM图像进行分析研究,得到三维孔隙率的估算数据,引入均方根误差检验提取结果的离散程度并予以修正,以探究基于图像解释固化污泥的微观研究方法和变化机理,同时对各配比样品抗剪强度、含水率、干密度进行研究,探究其与估算值得相关关系,以期对实际施工进行指导。结果表明:采用的固化污泥三维孔隙率提取方法是可行的,通过引入均方根误差以检验其离散程度能够使提取值变化趋势与真实值更加接近,为固化污泥微观结构定量研究提供了方法。
The micro-structure of soil body is considered to determine its macro-characters. Meanwhile, the grey level that SEM images present is regarded to have a close correlation with microscopic distribution of the soil. Thus, based on GIS, the SEM images of solidified sludge（SS） with different cement content are studied and quantitatively analyzed in this paper. 3D porosities are extracted as the micro-perspective research methods for SS, and the extracted results are compared with the soil test ones to analyze the errors. Meanwhile, shearing strength, moisture content, dry density of different samples are compared with estimation results. Conclusion is drawn that despite the minor errors between estimated results and soil test ones, quantitative estimate of 3D Porosity is a feasible way to offers technical parameters for soil mechanics research, as well as to instruct the construction.
基金
国家自然科学基金
基于生化相变过程的污泥固化土压缩机理及填埋沉降研究(51278172)
