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A theory of loosening earth pressure above a shallow tunnel in unsaturated ground
http://hdl.handle.net/10131/00013282
http://hdl.handle.net/10131/00013282444df7e6-1661-4f69-8773-6c0b5438c3c7
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20200221Fang-journal_txt_clean.pdf (406.9 kB)
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20200221Fang-journal_tables (196.8 kB)
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20200221Fang-journal_fig (2.0 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2020-06-09 | |||||
タイトル | ||||||
タイトル | A theory of loosening earth pressure above a shallow tunnel in unsaturated ground | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題 | limit equilibrium theory, loosening earth pressure, modeling, shallow tunnel, unsaturated ground | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Fang, Xu
× Fang, Xu× Kikumoto, Mamoru× Cui, Ying |
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著者所属 | ||||||
Department of Civil Engineering, Yokohama National University | ||||||
著者所属 | ||||||
Department of Civil Engineering, Yokohama National University | ||||||
著者所属 | ||||||
Department of Civil Engineering, Yokohama National University | ||||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | A theory is proposed to evaluate the loosening earth pressure (vertical earth pressure after excavation) acting on a shallow tunnel in unsaturated ground with an arbitrary groundwater level. The theory is developed based on the limit equilibrium theory, combining soil–water characteristic curves, Mohr–Coulomb failure criteria, and effective stress for unsaturated soils. The proposed theory is applied to predict the vertical distribution of loosening earth pressure in unsaturated ground, which shows a significant difference from that in saturated ground. In unsaturated ground, suction contributes to the increase in effective loosening earth pressure and shear resistance. The remarkable effects of groundwater depth, soil type, and scale of overburden height and trapdoor width on loosening earth pressure are also revealed. Based on the soil–water characteristic curve, the degree of saturation decreases, which causes wet density to decrease and the total and effective loosening earth pressures to have contrary tendencies. Moreover, effective loosening earth pressures vary with soil type as the degree of saturation varies. The total loosening earth pressures are, however, very similar regardless of soil type, because wet density and shear resistance have similar tendencies. The proposed theory provides a valid model for loosening earth pressure in unsaturated ground that will be useful for shallow tunnel excavations. | |||||
書誌情報 |
International journal for numerical and analytical methods in geomechanics 巻 44, 号 10, p. 1495-1508, 発行日 2020-03-26 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 10969853 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA11621355 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1002/nag.3072 | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
出版者 | ||||||
出版者 | Wiley | |||||
関係URI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1002/nag.3072 | |||||
関連名称 | https://doi.org/10.1002/nag.3072 |