数字图像测量技术在土工三轴试验中的应用研究  

Application of digital image processing technique to triaxial test in soil mechanics

作　　者：邵龙潭[1] 孙益振[1] 王助贫[2] 刘永禄[1] 

机构地区：[1]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116023 [2]中国农业大学土木与水利工程学院,北京100083

出　　处：《岩土力学》2006年第1期29-34,共6页Rock and Soil Mechanics

基　　金：教育部高等学校骨干教师资助计划资助(No.2000-65);留学回国人员科研启动基金资助项目(No.2001-345)

摘　　要：将数字图像处理技术应用于土工三轴试验土样变形测量,提供了一种新的非接触变形测量手段。可消除传统三轴系统的变形测量误差,可测量土样任意部分的局部变形、剪切带的形成和发展过程,可定量分析橡皮膜嵌入的影响,还可实时跟踪并纪录土样变形过程。文中讨论了图像测量结果与传统测量结果的差别,指出对于标准的小三轴试样可以取中间40 mm左右的试样段进行变形测量以排除端部效应影响。A new means with digital image processing technique for deformation measuring of soil specimen in triaxial test is provided. Using this technique, the error of the deformation measurement, which occurs in traditional triaxial test, can be eliminated. The local deformation of any part of the soil specimen can be measured at will. The coming into being and development of shear bands of the specimen can also be determined. The influence of membrane penetration in the test can be analyzed quantitatively. Meanwhile, the deformation process of the soil specimen can also be tracked and recorded. Comparison of the results by digital image processing technique and by traditional method shows that the former is more accurate. It is indicated that for standard small specimen, measuring the middle 40mm part＇s deformation can get rid of the influence of the end on the deformation.

关 键 词：数字图像分析 三轴试验 变形测量 试验技术 

分 类 号：TU22[建筑科学—建筑设计及理论]