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http://dx.doi.org/10.9711/KTAJ.2010.12.5.369

A study on stresses and displacements of the ground according to the closure ratio of tunnel face during tunnel excavation  

Kim, Sang-Hwan (호서대학교)
Min, Byeong-Heon (호서대학교)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.12, no.5, 2010 , pp. 369-378 More about this Journal
Abstract
This paper presents a new approach of closing the tunnel face with sprayed concrete to reduce the stress at the tunnel face and displacement occurring at the ground surface during tunnel excavation. In order to carry out this research, the experimental and numerical studies are performed. In the experimental study, the model tests are carried out according to the closure ratio of tunnel face, tunnel depth and tunnel excavation length. The model test results are analyzed and interpreted by numerical calculation in order to verify both results obtained from experimental and numerical studies. It is clearly found that the tunnel face stability is decreased in decreasing the closure ratio of tunnel face. The results also show that the tunnel face is stable when the closure ratio of tunnel face is larger than 80%. This research will be very useful to develop the economical tunnel face closing system.
Keywords
Closure ratio of tunnel face; sprayed concrete; model test;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
연도 인용수 순위
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