黑方台黄土的孔隙特征及其与湿陷性的关系分析

谢潇; 侯晓坤; 赵权利; 李萍; 李同录; 邓乐娟

doi:10.13544/j.cnki.jeg.2016.s1.054

黑方台黄土的孔隙特征及其与湿陷性的关系分析

长安大学地质工程与测绘学院地质工程系西安 710054

基金项目:

国家重点基础研究发展计划（973计划）资助项目（2014CB744701），国家自然科学基金（41372329，41502286）资助

详细信息

作者简介:
谢潇(1992-),女,硕士生,主要从事黄土微结构方面的研究工作.Email:1373669635@qq.com

中图分类号: P642
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- 文章访问数: 1682
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出版历程
- 收稿日期: 2016-02-24
- 修回日期: 2016-05-19
- 刊出日期: 2016-12-24

ANALYSIS OF THE RELATIONSHIP BETWEEN THE PORE DISTRIBUTIONS AND COLLAPSIBILITY OF LOESS

Geological Engineering of Geological Engineering and Surveying Institute, Chang'an University, Xi'an 710054

摘要

摘要: 为探究黄土的微观结构特征及其对湿陷性的影响，以黑方台10m、20m、26m和30m埋深的Q3黄土为研究对象，采用双线法测得土体的湿陷系数，并用光学显微镜和图像合成技术获得湿陷前后的微结构图像，统计出孔隙的面积和等效半径，分析了颗粒组成及孔隙等效半径随深度的变化规律，探讨了孔隙分布特征对湿陷性的影响。结果表明：随埋深增大，黑方台黄土颗粒粒径减小、大孔隙减少而中小孔隙增加，峰值对应的孔隙等效半径减小，小于10m的孔隙减小；土体的孔隙分布特征会对其湿陷性产生显著的影响，黄土中的大中孔隙越多，其湿陷系数越大，湿陷性越强。
- 黄土 /
- 湿陷性 /
- 黄土孔隙 /
- 细观结构 /
- 含水量
Abstract: In order to explore the characteristics of loess microstructure and its relationship with collapsibility,took Q3 loess of Heifangtai at different depth as objects, measured its collapsibility coefficient by using two-test collapsible method, and then used the optical microscope and also utilized image synthesis technology to extract its microstructure image before and after collapse, counted pore area and it's equivalent radius, the composition of the particles and equivalent radius of loess pore were analyzed with their changes by the depth, and also explore the effect the pore distributions have on the collapsibility. With depth increasing, particle size of Heifangtai loess reduced, large pores reduced, small and middle pores increased, the peak pore equivalent radius reduced and the volume of the pore,10m decreases; Soil pore distribution character has a significant impact on its collapsibility, the more large and middle sized pore loess has, the bigger its collapsibility coefficient and the stronger its collapsibility is.
- Loess /
- Collapsibility /
- Loess porosity /
- Microstructure /
- Moisture content

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