摘要
土体在三轴压缩条件下的力学特性是研究土体在其他受荷条件下力学特性的基础,而土体在不同受荷条件下力学特性的差异,主要是由土体内部结构的差异性决定的。为研究黏性土在三轴压缩条件下内部结构的动态调整,利用自行研制的微细结构光学测试系统,对荷载作用下黏性土微细结构调整信息进行了连续采集,并做了定量分析。研究结果表明:孔隙和颗粒集聚体的变化存在一定的关联性;随着荷载的增加,颗粒集聚体排列向着杂乱无序的方向发展,孔隙定向性优于颗粒排列;在荷载作用下,土体通过自身形态的变化,排列形式的调整,逐步向稳定的承载形式过渡,使变形向逐渐减小的趋势发展。
The mechanical characteristic of soil mass under triaxial compression is always the base of studying the mechanical characteristic of soil mass under other loads, while the discrepancy of the mechanical characteristic of soil mass under different loads is mainly determined by the internal structure of soil mass. In order to study better the dynamic alignment of cohesive soils＇ internal structure, the alignment information of cohesive soils＇ microstructure is gathered and analyzed quantitatively, by using the image processing system made by our own lab. The study indicates： the pore＇ s and particle conglomerate＇ s change are all linked together under load ; with the load increasing, the arrangement of the particle conglomerate is developed to the immethodical state and the pore＇ s directionality is better than the particle conglomerate＇ s; through changing its own form and adjusting its arrangement under load soil mass transform piece by piece into the steadily load-bearing form and its deformation develop towards the trend that the deformation reduces.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2006年第6期57-62,共6页
Journal of Sichuan University (Engineering Science Edition)
基金
国家自然科学基金资助项目(50279008
40374047)
关键词
粘性土
微细结构
定向度
分布分维
cohesive soil
microstructure
directional entropy
distributing fractal dimension
