三轴土样局部变形的数字图像测量方法

Digital image processing technique for measurement of the local deformation of soil specimen in triaxial test

摘要: 在已完成的土样径向变形数字图像测量基础上 ,实现了土样轴向变形和径向变形的同步测量 ,不仅可测量土样整体的平均变形 ,而且可测量土样的局部变形 ,还给出了图像测量系统的理论精度和实际测量精度。用砂土、粉煤灰两种饱和试样进行固结排水剪切试验 ,对采用图像测量方法得到的三轴土样不同部位的局部测量结果和采用传统测量方法得到的整体平均测量结果进行了比较

Abstract: Radial and axial deformations are measured by digital image processing method(DIPM) and not only the average deformation of whole specimen but also the local deformation at different location of soil specimen can be obtained. The theoretical and real accuracy are given in this paper. At the end, local deformations measured at different section by DIPM and the average results by traditional method are compared.