In order to research the influences of cyclic variation of temperature on the deformation

strength

damage and fracture

the contrast test of the uniaxial compression and triaxial compression

which is about the whole stress-strain behaviors of the marble under the action of cyclic (repeated 8 times) temperature from 100 ℃ to 800 ℃ and high confining pressure(60 MPa)

is done by using hydraulic pressure servo rigidity rock mechanics experiment system MTS815.03. The specimens of the marbles come from the diversion tunnel of Liangshan Yalongjiang Dahewan Jinping Hydropower Station in Sichuan Province. We analyse the Influence of the high temperature and high cyclic temperature on the stress-strain behaviors

peak stress

peak strain

stress

residual strain and elastic ratio; it is shown that the peak strength

residual strength and elastic modulus decrease when the samples suffer more high temperature; at the same time

the peak strain and residual strain increases; at the same temperature

when the times of the cycle increasing

the elastic modulus

peak strength and residual strength of marble will decrease; and the higher temperature

the more obviously the decrease; after multiple cycle

the plastic characteristics of marble increase

the stress-strain curve behind the peak is not smooth

and residual strain diminish. The achievements mentioned above provide the basis for the diversion tunnel of Jinping Hydropower Station.