SHAO Long-tan, SUN Yi-zhen, WANG Zhu-pin, et al. Application of digital image processing technique to triaxial test in soil mechanics[J]. 2006, 27(1).DOI:
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.