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Three Dimensional In-situ Stress Distribution in the Southern Korean Peninsula and Its Application in Tunnel Analysis  

김동갑 ((주)경성엔지니어링)
박종관 (서울산업대학교 토목공학과)
Publication Information
Journal of the Korean Geotechnical Society / v.18, no.2, 2002 , pp. 65-74 More about this Journal
Abstract
The measurement of in-situ stress is essential to estimate the ground displacement and the stress distribution of a tunnel and an underground structure. In this study, the in-situ stress distribution of the Southern Korean peninsula was re-evaluated by the new 380 in-situ data which were determined by overcoring and hydrofracturing methods, and the three-din erosional numerical analysis of tunnelling was performed. The results of in-situ stress distribution show that the distribution of horizontal stress tends to be more irregular in metamorphosed(gneiss) and granite areas than in sedimentary and volcanic areas. The ratio of horizontal to vertical stresses(K-value) in volcanic area is less than 1 below the depth of 150m. The direction and magnitude of three dimensional in-situ stresses were shown simultaneously in a figure for the first time in Korea. The three-dimensional numerical analysis of tunnelling indicates that the orientation and magnitude of displacement around a tunnel are controlled mainly by the difference between the maximum and minimum horizontal stresses.
Keywords
3-D numerical analysis; In-situ stress; K-value; Orientation of in-situ stress;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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