CALCULATION OF ROCK RESISTANT FACTOR IN TUNNEL CONSIDERING INTERMEDIATE PRINCIPAL STRESS EFFECT
Xu Shuanqiang1，2，Yu Maohong1
(1School of Civil Engineering and Mechanics，Xian Jiaotong University， Xian 710049 China) (2Department of Civil Engineering，Xian Institute of Technology， Xian 710032 China)
Abstract：Based on the unified strength theory，the formula for calculating rock resistant factor in circular hydraulic tunnel is derived. This formula can give some results obtained by previous formulas，and a series of new results which can consider the intermediate principal stress effect. Therefore，it can be applied to more situations of rocks.
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2004, Vol. 23 
