《Journal of Geotechnical and Geoenvironmental Engineering》杂志刊登“基于图像分析方法定量研究砂土颗粒的尺寸和形状”

作者：F. Altuhafi; C. O’Sullivan; and I. Cavarretta

刊物：《Journal of Geotechnical and Geoenvironmental Engineering》，2013年8月，139卷第8期，1290–1307页

关键词：形状；尺寸；颗粒；砂土

摘要：砂土响应取决于颗粒形态（尺寸和形状）。在岩土工程研究和实践中，筛分法是获取颗粒典型尺寸的常用方法。颗粒形状进行定性描述技术的发展意味着很容易就可以得到砂土颗粒的数字图像，使得形状可以确定。但许多数字图像分析算法的复杂性限制了其在基础研究中的应用。本文引入了一种确定形状分析的有效方法，该方法在岩土工程研究和实践中具有广泛的应用潜力。该方法生成了三种形状单位（凸度、球度和长宽比），这三种单位很容易用数字图像计算得到。随后采用图像方法对这行形状单位进行分析，给出了一个36种砂土的数据库，其中包括许多岩土工程研究中常用的砂。通过对这些砂土已公布的形状评估来看，定性描述的主观特性是十分明显的。最后给出了36种砂中每一种砂的凸度、球度和长宽比数据。通过比较这些参数和普遍应用的定性描述，建立了这些参数和岩土工程之间的关系。

Analysis of an Image-Based Method to Quantify the Size and Shape of Sand Particles

Authors: F. Altuhafi; C. O’Sullivan; and I. Cavarretta

Journal: Journal of Geotechnical and Geoenvironmental Engineering, Volume 139, Issue 8(August 2013), 1290–1307

Key words: Shape, Size, Particles, Sand

Abstract: Sand response depends on particle morphology (size and shape). In geotechnical research and practice, size is typically assessed by sieve analysis and particle shapes are qualitatively described. Technological developments mean that digital images of sand particles can easily be obtained, enabling shape to be quantified. The complexity associated with many digital image analysis algorithms seems to have restricted their use to fundamental research studies. This study introduces a pragmatic approach for quantitative shape analysis that has the potential to be broadly adopted in geotechnical engineering research and practice. The approach generates three shape measures (convexity, spheroid, and aspect ratio) that can easily be calculated from digital images. Following an analysis of these shape measures and the imaging method used here, a database of 36 sands, including many of the sands commonly used in geotechnical research, is presented. The subjective nature of qualitative description is clear from the discrepancies that were found in published shape assessments of these sands. Convexity, spheroid, and aspect ratio data for each of the 36 sands are presented. The relevance of these parameters to geotechnical engineering is established by comparing them with widely used qualitative descriptions.

原文链接：http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000855