摘要
将黏土失水引起土体体积变形转换为面积变形,提出利用计算机图像处理与像数计算技术,对不同初始含水率的黏土收缩后的面积进行精确计算。利用激光颗粒分析仪对不同膨胀性的黏性土进行颗粒分析;并将颗粒组成与收缩后面缩率进行对比。试验结果表明:自由膨胀率和面缩率的大小与土体的颗粒组成密切相关。随着土体自由膨胀率增加,土体细颗粒含量增加,面缩率增大,土体的收缩性能增强。
Volume deformation of clay soil caused by loss of water was converted into area deformation. Area of clay soil with different initial water contents after shrinkage was calculated accurately by computer image processing and computation technology. The relationship between particle composition and area contraction ratio of clay soil with different free swelling ratios was investigated by laser particle analyzer. Test result shows that content of fine aggregate and area contraction ratio of soil ascend with the increase of free swelling ratio, which also enhances the shrinkage property.
出处
《科学技术与工程》
北大核心
2013年第9期2591-2593,共3页
Science Technology and Engineering
关键词
黏土
颗粒分析
自由膨胀率
面缩率
clay soil particle analysis free swelling ratio area contraction ratio
