Effect of opening on the shear behavior of granular materials in direct shear test

This paper examines the effect of the opening between the shear boxes on the shear behavior in the direct shear box test (H=20 mm×D=60 mm) under a constant vertical stress using seven types of granular material. It is observed that the magnitude of shear strength and dilatancy decreases due to the o...

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Bibliographic Details
Published in:KSCE journal of civil engineering 2012, 16(7), , pp.1132-1142
Main Authors: Kim, Byeong-Su, Shibuya, Satoru, Park, Seong-Wan, Kato, Shoji
Format: Article
Language:English
Subjects:
Civil Engineering
Constants
Dilatancy
Engineering
Geotechnical Engineering & Applied Earth Sciences
Granular materials
Guidelines
Industrial Pollution Prevention
Outflow
Polytetrafluoroethylene
Polytetrafluoroethylenes
Research Paper
Sand
Shear
Shear strength
Shear tests
Thresholds
토목공학
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Summary:This paper examines the effect of the opening between the shear boxes on the shear behavior in the direct shear box test (H=20 mm×D=60 mm) under a constant vertical stress using seven types of granular material. It is observed that the magnitude of shear strength and dilatancy decreases due to the outflow of sample with an increase in the opening. The two notions of the Threshold Point (TP) as the limit opening size and the Threshold Line (TL) offering the guideline of opening size is defined according to the mean particle size of soil samples. However, similar shear behaviors were observed regardless of the opening size because there was no outflow of sample through applying the Teflon sheet in the direct shear box tests for Toyoura sand. Finally, the shear mode on the circular specimen applying the Teflon sheet is also examined in comparison with the results from other tests.
ISSN:1226-7988
1976-3808
DOI:10.1007/s12205-012-1518-4