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http://dx.doi.org/10.9720/kseg.2016.3.307

Ring Shear Characteristics of Waste Rock Materials in Terms of Water Leakage  

Jeong, Sueng Won (Korea Institute of Geoscience and Mineral Resources)
Publication Information
The Journal of Engineering Geology / v.26, no.3, 2016 , pp. 307-314 More about this Journal
Abstract
Shear characteristics of soils can be investigated using various types of shear stress measuring apparatus. Ring shear tests are often applied for examining the residual shear strength under the unlimited deformation. This paper presents drainage-consolidation-shear velocity dependent undrained shear strengths measured in terms of water leakage. A series of ring shear tests were performed under the constant normal stress (50 kPa) and controled shear velocity ranging from 0.01~1 mm/sec under the undrained condition. As a result, undrained shear strengths are dependent on shear velocity. It exhibits that straining hardening behavior is observed for the shear velocity lower than 0.1 mm/sec; however, the strain softening behavior is observed for the shear velocity higher than 0.1 mm/sec. Water leakage can cause the increase in shear stress irrespective of shear velocity. Shear stress increases with increasing amount of water leakage. It is due to the fact that the small grains and water flow out through the rubble edge in the ring shear box. Repetitive saturation and consolidation processes may minimize the error.
Keywords
ring shear apparatus; undrained shear strength; water leakage; strain hardening; strain Softening;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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