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Behaviour Analysis of Crown Collapse under Tunnel Construction After Completing Reinforcement
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 Title & Authors
Behaviour Analysis of Crown Collapse under Tunnel Construction After Completing Reinforcement
Kim, Nagyoung; Baek, Seungchol; Min, Kyungjun; Kim, Bongsu; Heo, Yol;
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 Abstract
The final stability analysis of the tunnel structure is generally evaluated by performing site monitoring to determine whether or not the measured value through the convergence after the completion of excavation in the face. When the ground conditions are so poor, the reinforcement around the tunnel was applied for enhancing the stability of tunnels. For the additional tunnel crown collapse or excessive displacement have occurred under construction, correlation analysis were performed for the comparison construction and numeric analyses. In this paper, we investigated the collapse types, tunnel collapse were mostly occurs at the crown and they were analyzed because of the geological conditions in the collapse zone. And also, it was analyzed as being correlated in the crown of tunnel exists a fault fracture zone which extends to the surface part. Thus, in case of ground conditions such as fault fracture zone with a tunnel extending from the crown to the surface, the behavior is larger than the behavior predicted by numerical method.
 Keywords
Convergence of tunnel behaviour;Direction of fracture zone;The numerical method;
 Language
Korean
 Cited by
 References
1.
Korea Expressway Corporation (2005), The analysis report of 00tunnel collpase, pp. 10-89 (in Korean).

2.
Korea Expressway Corporation (2007a), The report of collapse cause and reinforcement of ${\Delta}{\Delta}$tunnel, pp. 14-102 (in Korean).

3.
Korea Expressway Corporation (2007b), The report of collapse cause and reinforcement of $\square$$\square$tunnel, pp. 21-48 (in Korean).

4.
Korea Expressway Corporation (2008), The report of collapse cause and reinforcement of ${\nabla}{\nabla}$tunnel, pp. 45-120 (in Korean).

5.
Korea Tunnelling and Underground Space Association (2010), Cases of tunnel collapse, pp. 35-100 (in Korean).