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http://dx.doi.org/10.7843/kgs.2011.27.11.047

Longitudinal Deformation Characteristics during Excavation of a old Tunnel in Operation  

Baek, Ki-Hyun (Daewoo E&C)
Kim, Woong-Ku (Daewoo E&C)
Seo, Kyoung-Won (Daewoo E&C)
You, Dong-Woo (Korea Infrastructure Safety & Technology Corporation)
Publication Information
Journal of the Korean Geotechnical Society / v.27, no.11, 2011 , pp. 47-54 More about this Journal
Abstract
In this paper, longitudinal behaviors of a tunnel with respect to various conditions are analyzed, and a new equation of longitudinal deformation curve during tunnel expansion is proposed. Finally, the range of protection by a protector is investigated using the proposed equation. To achieve the objectives, numerical analysis according to the ground and expansion conditions is performed. The results show that the range of protection, when a 2 traffic lane tunnel is expanded to 4 traffic lanes, should cover at least 24m to backward and 35m forward.
Keywords
Ground reaction curve; Longitudinal deformation profile; Old tunnel; Tunnel expansion;
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