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http://dx.doi.org/10.14481/jkges.2017.18.5.17

A Study on the Deformation Modulus for Tunnel Displacement Assessment in Multi-Jointed Rock Mass  

Son, Moorak (Department of Civil Engineering, Daegu University)
Lee, Wonki (Department of Civil Engineering, Daegu University)
Publication Information
Journal of the Korean GEO-environmental Society / v.18, no.5, 2017 , pp. 17-26 More about this Journal
Abstract
Tunnel excavation in jointed rock mass induces a displacement along tunnel excavation line and its assessment is very important to ensure the stability of tunnel and a demanded space. Tunnel displacement is directly related to the deformation modulus of ground and therefore it is essential to know the value of the parameter. However, most rock masses where tunnels are constructed are generally jointed and it is difficult to find out the deformation modulus of jointed rock mass simply based on an homogeneous isotropic elastic medium because the deformation modulus is highly affected by joint condition as well as rock type. Accordingly, this study carried out extensive numerical parametric studies to examine the variation of deformation modulus in different joint conditions and rock types under the condition of tunnel excavation. The study results were compared with existing empirical relationships and also shown in the chart of deformation modulus variation in different jointed rock mass conditions.
Keywords
Deformation modulus; Jointed rock mass; Tunnel excavation; Displacement;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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