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A Study on Anisotropic Reinforcing Mechanism of Umbrella Arch Reinforcement Method in Tunnelling  

배규진 (한국건설기술연구원, 지반연구부)
신휴성 (한국건설기술연구원, 지반연구부)
최용기 (대원토질㈜)
Publication Information
Journal of the Korean Geotechnical Society / v.19, no.6, 2003 , pp. 245-259 More about this Journal
Abstract
This paper deals with an Umbrealla Arch Reinforcement Method (UARM) in tunnelling. It is known that the mechanism of the reinforcement system is too complex to be simulated in existent finite element (FE) frameworks when considering its complex geometry of pipe arrangements and contribution of each component of the reinforcement to reinforcing effect. In this study a 3-D elastoplastic FE procedure is, therefore, proposed by introducing homogenisation technique, which is used to define mathematically elastic as well as elastoplastic characteristics of a reinforced ground material as a composite. A number of practical suggestions are addressed considering staged constructions of tunnels. For illustrative purposes, a series of parametric studies are undertaken and anisotropic characteristics of the reinforced ground as well as effects of the reinforcement on tunnel convergences are investigated. It is found that the reinforced ground material defined in homogenisation framework has its mechanical characteristics reasonably representing inherent geometrical and quantitative characteristics of each of constituents.
Keywords
Homogenization technique; Three-dimensional elastoplastic finite element analysis; Tunnel reinforcements; Umbrella arch reinforcement method;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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