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Estimation of Total Displacements by RMR Grades using 3-Dimensional Numerical Analysis  

Yim, Sung-Bin (Department of Earth & Environmental Sciences, Chungbuk National University)
Yun, Hyun-Seok (Department of Earth & Environmental Sciences, Chungbuk National University)
Seo, Yong-Seok (Department of Earth & Environmental Sciences, Chungbuk National University)
Park, Si-Hyun (Korea Infrastructure Safety & Technology Corporation, Underground Facility Dept.)
Publication Information
The Journal of Engineering Geology / v.17, no.2, 2007 , pp. 217-224 More about this Journal
Abstract
Tunnel displacement happens during the process of stress redistribution by tunnelling. Tunnel displacement can be divided into 3 types such as displacements occurring before excavation, non-measured displacements after excavation and measured displacements after excavation. Because measurements of displacements occurring before excavation and non-measured displacement after excavation are difficult and time-consuming in the field, many researchers have studied on total displacement and its characteristics with excavation using numerical analysis. In this study, we used a 3-D back analysis to estimate total displacement by rock mass grades in tunnel constructed in sedimentary rock. We reduced error between measured displacements and calculated displacements from a 3-D numerical analysis, and then estimated suitable rock mass properties by RMR classes. Ultimately, Logistic nonlinear regressions of total displacement with tunnelling were estimated by least square estimation.
Keywords
measured displacement; 3-dimensional numerical analysis; back analysis; nonlinear regression; Logistic model;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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