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- W2082574536 abstract "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 0.6 H ( H = height of tunnel), 1 bolt/m 2 and 195 MN, 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." @default.
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- W2082574536 date "2015-03-01" @default.
- W2082574536 modified "2023-10-16" @default.
- W2082574536 title "Numerical parametric study on stability and deformation of tunnel face reinforced with face bolts" @default.
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- W2082574536 doi "https://doi.org/10.1016/j.tust.2014.11.008" @default.
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