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A new rheological model and its application in mountain tunnelling

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タイトル: A new rheological model and its application in mountain tunnelling
著者: Guan, Zhenchang / Jiang, Yujing / Tanabashi, Yoshihiko / Huang, Hongwei
発行日: 2008年 5月
出版者: Elsevier Ltd.
引用: Tunnelling and Underground Space Technology, 23(3), pp.292-299; 2008
抄録: The time-dependent features of soft rock, named rheology generally, should be taken into account in the long-term design and maintenance of mountain tunnels. Based on the classic Burger-MC rheological model, a Burger-deterioration rheological model is proposed in this paper and is implemented in the numerical codes FLAC3D. A deterioration threshold and two deterioration ratios are introduced in this model to consider the time-dependent strength deterioration aspect of the rock mass. The proposed model is applied to an engineering instance (Ureshino Tunnel Line I, Nagasaki, Japan) to account for the delayed deformations that occurred after its completion since November 1992. The delayed crown settlement and invert upheaval computed from simulations are featured by an exponential characteristic and a stair-typed characteristic, respectively, which agree well with the in-site monitoring data qualitatively. In addition, the realistic rheological parameters involved in the proposed model can be back-analyzed from the in-site monitoring data.
キーワード: Burger-deterioration model / Delayed deformation / NATM / Rheology
URI: http://hdl.handle.net/10069/22307
ISSN: 08867798
DOI: 10.1016/j.tust.2007.06.003
権利: Copyright © 2007 Elsevier Ltd All rights reserved.
資料タイプ: Journal Article
原稿種類: author
出現コレクション:060 学術雑誌論文

引用URI : http://hdl.handle.net/10069/22307



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