Vision Cone Penetrometer for Direct Subsurface Soil Observation
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 123, Issue 11
Abstract
The cone penetration test (CPT) has gained wide acceptance for geotechnical site characterization and measurement of mechanical soil properties in situ. However, unlike the standard penetration test (SPT), soil specimens are not obtained in the CPT. Therefore, the soil type can only be estimated through empirical correlations with CPT sounding data or by retrieving field specimens adjacent to the test location. This technical note describes a new vision cone penetrometer (VisCPT), which permits observation and recording of subsurface images in real time as the VisCPT is pushed into the ground at the CPT standard advance rate of 20 mm/s. A high- and low-magnification miniature charge-coupled device (CCD) camera system housed within the VisCPT provide images with fields of view of 2.3 and 18 mm, respectively (measured diagonally). A field video recording system allows the video sequence from each camera to be recorded in real time on two super VHS (S-VHS) format video recorders. Examples of images acquired in situ are presented.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Hryciw, R. D., Ghalib, A. M., and Raschke, S. A. (1997). “Methods for soil characterization from images of grain assemblies.”Proc., Digital Image Technol. II: Techniques and Civ. Engrg. Applications, Engineering Foundation, Davos, Switzerland.
2.
Hryciw, R. D., and Raschke, S. A. (1996). “Development of a computer vision technique for in-situ soil characterization.”Transp. Res. Record 1526, National Academy Press, Washington, D.C., 68–97.
3.
Raschke, S. A. (1996). “Computer vision for experimental soil micromechanics and soil characterization,” PhD dissertation, Univ. of Michigan, Ann Arbor, Mich.
Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 123 • Issue 11 • November 1997
Pages: 1074 - 1076
Copyright
Copyright © 1997 American Society of Civil Engineers.
History
Published online: Nov 1, 1997
Published in print: Nov 1997
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.