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http://dx.doi.org/10.9720/kseg.2013.2.149

Field Investigation and Stability Analysis of a Volcanic Rock Slope at the Song-Gok site, Wan-Do  

Kim, Hong-Gyun (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Ok, Young-Seok (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Kim, Seung-Hyun (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Koo, Ho-Bon (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Publication Information
The Journal of Engineering Geology / v.23, no.2, 2013 , pp. 149-160 More about this Journal
Abstract
Volcanic activity commonly creates a highly complicated volcanic complex due to the admixture of lava flow and sedimentation of volcanic ash. The Song-Gok site is composed of volcanic rocks that collapsed at the lower part of the slope, in combination with several discontinuities in and around a fault. The results of projection analysis indicated the possibility of plane, wedge, and toppling failure in the failure section. The results of discontinuity modeling using the Distinct Element Method (DEM) revealed a total displacement of 207 mm and a joint shear displacement of 114 mm. The yield surface zone was verified at the fault plane of the failure section. In geotechnical terms, volcanic rock slopes are characteristically vulnerable to failure because of differential weathering among the various rock types, the effect of groundwater based on the permeability of the rocks, and the presence of systematic joints generated by the cooling and contraction of lava. When considering the stability of a volcanic rock slope, it is necessary to consider data such as the geological features of the rock, as obtained through detailed geological survey, and variations in discontinuities and rock blocks.
Keywords
Volcanic complex; Volcanic rock slope; Distinct Element Method (DEM); Discontinuities; Stability;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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