Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Face Stability Assessment for Karst Tunnelling across a Filling-type Karst Cave
https://orcid.org/https://orcid.org/0000-0002-7680-449X
https://orcid.org/https://orcid.org/0009-0006-0274-3483
https://orcid.org/https://orcid.org/0009-0006-2216-5297
An innovative approach is introduced to ensure tunnel construction safety and determine the minimum safety thickness under filled-type karst cave conditions. Firstly, a computational model is developed with the assumption that the filling medium on the sliding surface is in a state of limit equilibrium. The thrust force of the filling medium is determined using the rigid equilibrium method and the Mohr-Coulomb criterion. Furthermore, the minimum safety thickness expressions are derived using elastic theory under both fixed support and simply supported conditions. Several factors influencing the minimum safety thickness are further analyzed and discussed. Finally, the validity of the present method is verified by comparing it with other research outcomes and numerical simulations under the engineering background of Dazhiping Tunnel. The research demonstrates that the minimum safety thickness is higher under simply supported conditions compared to fixed conditions. The minimum safety thickness increases with sliding surface radius, karst water pressure, and tunnel diameter, while decreasing with ultimate tensile strength of the rock mass and the shear strength of the filling medium. The research findings have significant implications for water inrush disaster prevention in karst tunnels and similar underground projects.
Face Stability Assessment for Karst Tunnelling across a Filling-type Karst Cave
https://orcid.org/https://orcid.org/0000-0002-7680-449X
https://orcid.org/https://orcid.org/0009-0006-0274-3483
https://orcid.org/https://orcid.org/0009-0006-2216-5297
An innovative approach is introduced to ensure tunnel construction safety and determine the minimum safety thickness under filled-type karst cave conditions. Firstly, a computational model is developed with the assumption that the filling medium on the sliding surface is in a state of limit equilibrium. The thrust force of the filling medium is determined using the rigid equilibrium method and the Mohr-Coulomb criterion. Furthermore, the minimum safety thickness expressions are derived using elastic theory under both fixed support and simply supported conditions. Several factors influencing the minimum safety thickness are further analyzed and discussed. Finally, the validity of the present method is verified by comparing it with other research outcomes and numerical simulations under the engineering background of Dazhiping Tunnel. The research demonstrates that the minimum safety thickness is higher under simply supported conditions compared to fixed conditions. The minimum safety thickness increases with sliding surface radius, karst water pressure, and tunnel diameter, while decreasing with ultimate tensile strength of the rock mass and the shear strength of the filling medium. The research findings have significant implications for water inrush disaster prevention in karst tunnels and similar underground projects.
Face Stability Assessment for Karst Tunnelling across a Filling-type Karst Cave
https://orcid.org/https://orcid.org/0000-0002-7680-449X
https://orcid.org/https://orcid.org/0009-0006-0274-3483
https://orcid.org/https://orcid.org/0009-0006-2216-5297
An innovative approach is introduced to ensure tunnel construction safety and determine the minimum safety thickness under filled-type karst cave conditions. Firstly, a computational model is developed with the assumption that the filling medium on the sliding surface is in a state of limit equilibrium. The thrust force of the filling medium is determined using the rigid equilibrium method and the Mohr-Coulomb criterion. Furthermore, the minimum safety thickness expressions are derived using elastic theory under both fixed support and simply supported conditions. Several factors influencing the minimum safety thickness are further analyzed and discussed. Finally, the validity of the present method is verified by comparing it with other research outcomes and numerical simulations under the engineering background of Dazhiping Tunnel. The research demonstrates that the minimum safety thickness is higher under simply supported conditions compared to fixed conditions. The minimum safety thickness increases with sliding surface radius, karst water pressure, and tunnel diameter, while decreasing with ultimate tensile strength of the rock mass and the shear strength of the filling medium. The research findings have significant implications for water inrush disaster prevention in karst tunnels and similar underground projects.
Face Stability Assessment for Karst Tunnelling across a Filling-type Karst Cave
KSCE J Civ Eng
Xiao, Qianfeng (Autor:in) / Li, Yajing (Autor:in) / Xue, Peng (Autor:in) / Wang, Yang (Autor:in) / Fu, Wenxi (Autor:in) / Ye, Fei (Autor:in)
KSCE Journal of Civil Engineering ; 28 ; 4116-4128
01.09.2024
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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