A Multi-Layer Blowout Model for the Tunneling Face Stability Analysis
Auteur(s): |
Minh-Ngan Vu
Minh-Ngoc Vu Duc-Tho Pham Tuan Nguyen-Sy Quoc-Bao Nguyen Viet-Duc Dang |
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Médium: | article de revue |
Langue(s): | anglais |
Publié dans: | Buildings, 23 mai 2023, n. 6, v. 13 |
Page(s): | 1362 |
DOI: | 10.3390/buildings13061362 |
Abstrait: |
The stability of the tunnel face during tunneling is one of the major criteria for the design and construction of the tunnel. Collapse and blowout are two modes of tunnel face failure during the excavation. The cover-to-diameter ratio is one of the main parameters controlling these failure modes. Several analytical solutions have been proposed to estimate the range of support pressure applied on the tunnel face to avoid both the collapse and the blowout. However, most of those models deal with homogeneous soils. This paper aims at proposing an analytical model to predict the blowout of the tunneling face of a tunnel in multi-layered soils. The derivation is based on a limit equilibrium analysis, which considers the water tCiable. The proposed model is validated against the real blowout data reported from the tunneling in the Second Heinenoord Tunnel project in the Netherlands. Then, the maximum support pressure exerted on the tunneling face is predicted as a function of the cover-to-diameter ratio, the tunnel diameter, and the water table level for five representative soils. Finally, the model is applied to an underground segment of the Hanoi Metro Line 3 project (in Vietnam) to show the role of the multi-layer aspect. |
Copyright: | © 2023 by the authors; licensee MDPI, Basel, Switzerland. |
License: | Cette oeuvre a été publiée sous la license Creative Commons Attribution 4.0 (CC-BY 4.0). Il est autorisé de partager et adapter l'oeuvre tant que l'auteur est crédité et la license est indiquée (avec le lien ci-dessus). Vous devez aussi indiquer si des changements on été fait vis-à-vis de l'original. |
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10728154 - Publié(e) le:
30.05.2023 - Modifié(e) le:
01.06.2023