Long-term Stability of Tunnel Anchor in Consideration of Rock Rheology

FU Jian-jun; JIANG Wu-jun; ZHAO Hai-bin; MEI Song-hua

doi:10.3969/j.issn.1001-5485.2014.11.0032014,31(11):12-16

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Journal of Changjiang River Scientific Research Institute ›› 2014, Vol. 31 ›› Issue (11) : 12-16. DOI: 10.3969/j.issn.1001-5485.2014.11.0032014,31(11):12-16

CHARACTERISTICS AND TESTS OF ROCK MECHANICS

Long-term Stability of Tunnel Anchor in Consideration of Rock Rheology

FU Jian-jun¹, JIANG Wu-jun², ZHAO Hai-bin¹, MEI Song-hua¹

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Abstract

Rock rheology is a focus in analysing long-term stability of tunnel anchor. By uniaxial compression creep tests and long-term contact surface shear strength tests, we obtained rock rheological parameters. These parameters together with CVISC model in FLAC^3D were integrated in the numerical simulation model of an engineering example. Results showed that in 100 years after the design, main cable force of tunnel anchor doubles, the anchor plug body, surrounding rock, and the contact surface between rock anchor plug body and surrounding rock has small long-term deformation, which meets the project’s design safety requirements. This research could be a reference for similar engineering studies.

Key words

tunnel anchor / long-term stability / uniaxial compression rheology / long-term shear strength of contact surface / anchor plug

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FU Jian-jun, JIANG Wu-jun, ZHAO Hai-bin, MEI Song-hua. Long-term Stability of Tunnel Anchor in Consideration of Rock Rheology[J]. Journal of Changjiang River Scientific Research Institute. 2014, 31(11): 12-16 https://doi.org/10.3969/j.issn.1001-5485.2014.11.0032014,31(11):12-16

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