Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Numerical parametric study on stability and deformation of tunnel face reinforced with face bolts
Abstract Although face bolting has been used as a stabilisation technique in open-face tunnelling for decades, there is still a lack of systematic ways for determining the optimum parameters of face bolts. To optimise design for face bolting in soft ground, it is necessary to understand the influences of each parameter associated with face bolting on ground response. In this note, five series of numerical parametric studies are carried out, to investigate the effects of length, density, reinforcement area, axial rigidity of face bolts and strength of soil on tunnel face stability and deformation in soft rock. Based on the ground condition, geometries of tunnel and configurations of face bolts simulated, the optimum length, density and axial rigidity of face bolts are found to be 0.6H (H =height of tunnel), 1bolt/m2 and 195MN, respectively. The optimum axial rigidity of face bolt appears to be independent of the bolt density. The computed results also reveal that it is more effective to reduce face deformation by installing face bolts around the tunnel periphery, than installing them near the central area of the tunnel face.
Numerical parametric study on stability and deformation of tunnel face reinforced with face bolts
Abstract Although face bolting has been used as a stabilisation technique in open-face tunnelling for decades, there is still a lack of systematic ways for determining the optimum parameters of face bolts. To optimise design for face bolting in soft ground, it is necessary to understand the influences of each parameter associated with face bolting on ground response. In this note, five series of numerical parametric studies are carried out, to investigate the effects of length, density, reinforcement area, axial rigidity of face bolts and strength of soil on tunnel face stability and deformation in soft rock. Based on the ground condition, geometries of tunnel and configurations of face bolts simulated, the optimum length, density and axial rigidity of face bolts are found to be 0.6H (H =height of tunnel), 1bolt/m2 and 195MN, respectively. The optimum axial rigidity of face bolt appears to be independent of the bolt density. The computed results also reveal that it is more effective to reduce face deformation by installing face bolts around the tunnel periphery, than installing them near the central area of the tunnel face.
Numerical parametric study on stability and deformation of tunnel face reinforced with face bolts
Li, Bin (Autor:in) / Hong, Y. (Autor:in) / Gao, Bo (Autor:in) / Qi, Tai Yue (Autor:in) / Wang, Zheng Zheng (Autor:in) / Zhou, Ji Ming (Autor:in)
Tunnelling and Underground Space Technology ; 47 ; 73-80
19.11.2014
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Numerical parametric study on stability and deformation of tunnel face reinforced with face bolts
| Online Contents | 2015
Laboratory and numerical investigation of tunnel reinforced with face bolts
| British Library Conference Proceedings | 2007
Experimental study of the stability of a tunnel face reinforced by bolts
| British Library Conference Proceedings | 2000
Stability of Tunnel Face Reinforced by Bolts under Seepage Flow Conditions
| Springer Verlag | 2022
Behaviour of a tunnel face reinforced by bolts: Comparison between analytical-numerical models
| British Library Conference Proceedings | 1998