高速铁路地基黄土微结构的分形研究  

Fractal study on loess microstructure of one high-speed railway foundation

作　　者：任权[1] 王家鼎[1] 袁中夏[2] 谷天峰[1] 

机构地区：[1]西北大学地质学系大陆动力学国家重点实验室,西安710068 [2]中国地震局兰州地震研究所,兰州730000

出　　处：《水文地质工程地质》2007年第6期76-78,82,共4页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金项目(40572157);高等学校博士学科点专项科研基金(20050697013)

摘　　要：基于分形理论,结合Photoshop等图像分析处理软件,在图像处理过程中选择适当的阈值,本文对郑州—西安客运专线地基黄土在动荷载作用下变形前后的孔隙微观结构进行分形研究。研究表明,黄土孔隙微观结构具有分形特征,揭示了黄土孔隙分形分维同孔隙比之间有近似直线的关系,且孔隙微结构分形分维越大,土体强度越大,反之越小。Based on the fractal theory and image-processing techniques such as Photoshop, Arcview and ArcMap,this paper researched the change of pore microstructure of loess under the dynamic load in the railway from Zhenzhou to Xi＇ an. The result shows that the pore microstructure of loess has the character of fractal, and then the approximate line relationship between the fractal dimension and the void ratio is discussed, and the more fractal dimension of pore microstructure of loess, the more strength of soils.

关 键 词：黄土 微结构 震陷 孔隙结构 分维 

分 类 号：P642.131[天文地球—工程地质学]