Experimental study on rheological deformation and stress properties of limestone
The systematic experiment regarding the general uniaxial compression test and the creep deformations of the typical limestones from the surrounding rock of the highway tunnels were made. The relationship between the axial stress and the delayed deformation steady value was obtained from the creep tests under low loading stresses. By the least square method, the parameters of Nishihara creep model were calculated from the creep curves. The results indicate that the sWain change always lags behind the increase of stress, and the long-term strength of the limestone is about 80.6% of the stress at the volumetric swain reversal which is obtained from the conventional uniaxial compression test.
creep experiment long-term strength stress at volumetric strain reversal limestone
TANG Ming-ming(唐明明) WANG Zhi-yin(王芝银)
Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum,Beijing 102249, China
国际会议
长沙
英文
475-478
2008-09-28（万方平台首次上网日期，不代表论文的发表时间）