基于扫描电镜图像的土体三维视孔隙率定量计算方法

冯怀平; 马德良; 刘启塬; 叶朝良

doi:10.11779/CJGE201903021

基于扫描电镜图像的土体三维视孔隙率定量计算方法 English Version

冯怀平^{1, 2},
马德良¹,
刘启塬¹,
叶朝良^1,2, ,

1. 石家庄铁道大学土木工程学院,河北石家庄 050043);
2. 石家庄铁道大学道路与铁道工程安全保障省部共建教育部重点实验室,河北石家庄 050043

基金项目: 国家自然科学基金项目（51478279）; 中国铁路总公司科技研究开发计划重点课题（2017G008-G）

详细信息

作者简介:
冯怀平(1975- ),男,副教授,博士生导师,主要从事非饱和土测试及数值模拟等方面的研究工作。E-mail: fenghuaiping@stdu.edu.cn。

通讯作者:
叶朝良，E-mail：yechl@stdu.edu.cn

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出版历程
- 收稿日期: 2018-07-10
- 发布日期: 2019-03-24

Method for calculating three dimensional apparent porosity of soils based on SEM images

1. School of Civil Engineering,Shijiazhuang Tiedao University, Shijiazhuang 050043, China;
2. Key Laboratory of Roads and Railway Engineering Safety Control of Ministry of Education (Shijiazhuang Tiedao University), Shijiazhuang 050043, China

摘要

摘要: 通过扫描电镜来观察土体微观结构是目前研究微观土力学的重要手段。目前,大部分通过SEM图像反映土体孔隙率的研究多采用二维表观孔隙率定性分析,而此时得到是土体的二维表观孔隙率难以反映土体真实的三维孔隙率。因此,建立一种基于二维扫描图像计算三维孔隙率的计算方法具有重要研究意义。基于SEM电镜扫描图像,利用SEM图像处理软件IPP,变换不同的阈值得到不用阈值下的二维表观孔隙率,并且引入二重积分的思想,提出了一种基于SEM扫描电镜二维图像确定土体三维视孔隙率的计算方法。最后对不同种类的土进行了对比试验验证,结果表明本文提出的计算方法能够较好地反映土体真实的三维孔隙率。
- 扫描电镜 /
- 三维视孔隙率 /
- IPP
Abstract: It is an important method to study the microstructure of soils by using the scanning electron microscopy (SEM). The recent researches on the microscopic porosity of the soils are based on the two-dimensional methods. The research methods mainly use the calibrated porosity to get the observation of the microstructural image of the soils and the apparent porosity. However, the microstructure by this way cannot conform to the change of the soil pores. Therefore, it is essential to learn the microstructure of the soils by using the SEM images and establish the quantitative relationship between the two-dimensional scanning image and the three-dimensional pore structure. Based on the SEM images and the double-integral method, a method for determining the three-dimensional unilateral apparent porosity of the soils with two-dimensional SEM images is proposed, and the comparitive tests on different soils are also carried out. The results show that the proposed method can reflect the three-dimensional porosity of the soils correctly.
- scanning electron microscope /
- three-dimensional porosity /
- IPP

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参考文献(27)

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