Abstract
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 strain 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 strain reversal which is obtained from the conventional uniaxial compression test.
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Foundation item: Project(50774090) supported by the National Natural Science Foundation of China
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Tang, Mm., Wang, Zy. Experimental study on rheological deformation and stress properties of limestone. J. Cent. South Univ. Technol. 15 (Suppl 1), 475–478 (2008). https://doi.org/10.1007/s11771-008-0403-2
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DOI: https://doi.org/10.1007/s11771-008-0403-2