摘要
目的为了从微观结构的角度建立软土的结构性流变模型.方法利用扫描电子显微镜,对软土固结流变过程中SEM图片进行图像处理,研究反映软土流变特征的微观参数,分析这些参数的变化规律.结果反映微结构单元体有序性和定向性的概率熵和分维值的变化规律和软土的固结蠕变变形关系密切,由此确立了软土的微观参数与宏观流变力学行为的定量关系,进而建立了含微观参数的结构性软土固结流变本构模型.结论模型检验表明,采用反映软土微结构单元体有序性和定向性的指标而建立的结构性流变模型是可行的.
In order to study the consolidation creep law of soft soil, The Scanning Electron Microscope （SEM） and Videolab Image Processing System were employed to observe the changing conditions of microstructure of soft soils distributed in Yingkou district, Liaoning Province of China. The microstructure parameters which can be used to explain the law of creep deformation are determined, and the results show that the probability entropy（Hm）and fractal dimension value（Dd）, which show the ordering extent of mi- crostructure units, have closely relation with the development of compressive creep. Based on this, the rheological constitutive relations of the structural soft soils were established at the end of this paper.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
2006年第2期177-180,共4页
Journal of Shenyang Jianzhu University：Natural Science
基金
辽宁省自然科学基金(SJJ200401)
关键词
软土
微观结构
概率熵
分维值
本构模型
soft soils
microstructure
probability entropy
fractal dimension
constitutive relations
