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(사)한국터널지하공간학회

ISSN : 2233-8292

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Vol.19 No.6
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Experimental study on the behavior of the adjacent ground due to the sidewall failure in a shallow tunnel

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2017, v.19 no.6, pp.871-885
https://doi.org/10.9711/KTAJ.2017.19.6.871


& (2017). Experimental study on the behavior of the adjacent ground due to the sidewall failure in a shallow tunnel. (사)한국터널지하공간학회, 19(6), 871-885, https://doi.org/10.9711/KTAJ.2017.19.6.871
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Abstract

Nowadays, the construction of tunnels with a shallow depth drastically in urban areas increases. But the effect of sidewall displacement in shallow tunnel on its behavior is not well known yet. Most studies on the shallow tunnel have been limited to the stability and the failure of the tunnel and the adjacent ground in plane strain state. Therefore, the model tests were conducted in a model ground which was built with carbon rods, in order to investigate the impact of the tunnel sidewall displacement on the lateral load transfer to the adjacent ground. The lateral displacement of the tunnel sidewall and the load transfered to the adjacent ground were measured in model tests for various overburdens (0.50D, 0.75D, 1.00D, 1.25D). As results, if the cover depth of tunnel was over a constant depth (0.75D) in a shallow tunnel, the tunnel sidewall was failed with a constant shape not depending on the tunnel cover depth and also not affected by the opposite side of the wall. But, if the cover depth of tunnel was under a constant depth (0.75D), the failure of the tunnel sidewall could affect the opposite sidewall. In addition, if the displacement of tunnel sidewall with 50% of the critical displacement occurred, the tunnel failure was found to be at least 75%. However, additional studies are deemed necessary, since they may differ depending on the ground conditions

keywords
얕은터널, 측벽파괴, 지표침하, 하중전이, 천단하중1. 서 론터널시공시, Shallow tunnel, Tunnel sidewall failure, Ground subsidence, Load transfer in tunnel, Load of tunnel crown

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