长江科学院院报2016，Vol.33Issue(10)：79-83,92,6.DOI:10.11988/ckyyb.20160355
砂雨法制备三轴砂样的影响因素及均匀性研究
Factors and Homogeneity of Triaxial Sand Specimens Preparation with Air Pluviation
摘要
Abstract
The influences of drop height, funnel diameter and fine particles’ contents on sand specimen preparation for indoor geotechnical triaxial test were studied through preparation test of Fujian standard sand with self -manufac-tured air pluviation device.Results showed that the relative density of sand specimens increased with the increasing of drop height, and the growth rate slowed down and tended to be stable .The relative density of sand specimens de -creased along with the increase of funnel diameter under the same drop height .A wider range of relative density can be achieved with the decrease of funnel diameter .The relative density of sand specimens decreased with the increasing of fine particles’ contents.The influences of drop height , funnel diameter and fine particles ’ contents on the relative density of sand specimens can be well explained by Newton ’s second law and conservation of energy .The gray image scanned with the 225 kV micro-computerized tomography of sand specimens prepared by air pluviation was analyzed by ImageJ software.The spatial homogeneity of sand specimens can be verified by reconstructing the three -dimensional model of sand specimens and calculating the proportion of sand pore area along the height of sand specimen .Further-more, reasonable suggestions on preparing triaxial sand specimens were proposed .关键词
砂雨法/砂样制备/砂土/CT 扫描/均匀性Key words
air pluviation/sand preparation/sand/CT scanning/homogeneity分类
建筑与水利引用本文复制引用
程朋,王勇,李雄威,孔令伟,王艳丽..砂雨法制备三轴砂样的影响因素及均匀性研究[J].长江科学院院报,2016,33(10):79-83,92,6.基金项目
国家自然科学基金项目（51579237，51309027）；江苏省自然科学基金项目（BK20131141）；深部岩土力学与地下工程国家重点实验室基金项目 （）
