American Society of Civil Engineers


Role of X-Ray CT on the Investigation of Ground Behavior beneath Vertically Loaded Deep and Shallow Foundations — New Direction of Research Tool


by Jun Otani, (Professor, Department of Civil and Environmental Engineering, Graduate School of Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan E-mail: junotani@kumamoto-u.ac.jp), Kazunari Morita, (Graduate student, Department of Civil and Environmental Engineering, Graduate School of Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan), and Masayuki Nakamura, (Graduate student, Department of Civil and Environmental Engineering, Graduate School of Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan)
Section: The Confluence of Visualization, Experimental, and Theoretical Mechanics, pp. 213-220, (doi:  http://dx.doi.org/10.1061/40972(311)27)

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Document type: Conference Proceeding Paper
Part of: GeoCongress 2008: Characterization, Monitoring, and Modeling of GeoSystems
Abstract: The purpose of this paper is to show the effectiveness of X-ray CT (Computed Tomography) on foundation engineering. Here, both model tests on vertically loaded shallow and deep foundations were conducted and the behaviors of those grounds were investigated using X-ray CT during the process of loadings. Based on those results, the ground behavior beneath shallow foundations and pile tips were discussed, especially at relatively large settlement of the foundations, which was considered to be the failure of the ground. The same behavior on steel-piped sheet-pile (SPSP) under vertical loading was also taken into consideration. The results were not only cross sectional images but also the reconstructed 3-D images which were made by a large number of cross sectional images. The effective image analyses were chosen in order to obtain the quantified images from CT scanning. Finally, it was convinced that X-ray CT was able to play a key role in geotechnical engineering.


ASCE Subject Headings:
X rays
Shallow foundations
Deep foundations
Soil stabilization