摘要
通过室外数码成像,记录了不同含水量下原状膨胀土表面裂隙的开展状态,基于MATLAB软件用二值化像素统计的方法对膨胀土表面裂隙率与含水量的关系进行了量化,并且在二值化图像的基础上,基于AutoLISP程序对原状膨胀土表面裂隙的分形维数进行自动化统计。分析结果表明,膨胀土表面裂隙率和分形维数与含水量的关系基本呈线性关系,单位含水量变化引起裂隙率和分维的不同变化特征可对膨胀土胀缩性做出相应区分;二值化像素和分形维数统计的方法均可对原状膨胀土表面裂隙进行描述分析,为进一步研究膨胀土的裂隙性提供了有效途径。
The developing process of expansive soil fissure is logged in the state of deferent water content by the method of field digital imaging. Based on the software of MATLAB, the relationship of field expansive soil fissure ratio and water content is measured through the way of two-value pixels. And the software, which is programmed with the language of AutoLISP, is used to dispose the fractal dimension of fissure. The compute results show that the ratio and fractal dimension of fissure has a linear correlation with water content. The variation of fissure ratio and fractal dimension can reflect the expansive and shrink characteristic of expansive soil. Both the two methods can depict and analyze the surface fissure of field expansive soil, which is effect to the study on fissure behavior.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2009年第1期96-99,共4页
Hydrogeology & Engineering Geology
基金
江苏省六大人才高峰项目基金(06-F-014)
关键词
膨胀土
二值化
裂隙率
分维
expansive soil
two-value pixels
fissure ratio
fractal dimension
