Calculation of resistance coefficient of adjoining rock for pressure tunnels considering effect of intermediate principal stress

CAI Xiaohong; CAI Yongbin; CAI Yongping; KANG Huaipeng

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Volume 29 Issue 7

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Chinese Journal of Geotechnical Engineering > 2007 > 29(7): 1004-1008.

CAI Xiaohong, CAI Yongbin, CAI Yongping, KANG Huaipeng. Calculation of resistance coefficient of adjoining rock for pressure tunnels considering effect of intermediate principal stress[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(7): 1004-1008.

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Calculation of resistance coefficient of adjoining rock for pressure tunnels considering effect of intermediate principal stress

1.Jiangxi Province Ji’an City Hydropower Bureau Ji’an 343000 China 2.Jiangxi Province Ji’an City Hydropower Planning and Designing Institute Ji’an 343000 China 3.Jiangxi Province Taihe City Prefecture Hydropower Survey Institute Taihe 343700 China

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Published Date: July 15, 2007

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Abstract

Abstract

By use of the unified strength theory,a method to calculate the resistance coefficient K of adjoining rock for pressure tumels was established considering effect of intermediate principal stress.The corresponding equations were given.They were degenerated to the Mohr-Coulomb yield model and Tresca yield model.The accuracy of test results were verified.
- intermediate principal stress,
- resistance coefficient of adjoining rock,
- unified strength theory