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Experimental Study Of The Effect Of Freeze-Thaw Cycles On Dynamic Characteristics Of Silty Sand, Jing Sun, Mao-Sheng Gong, Hong-Qiang Xiong, Lin-Rui Gan
Experimental Study Of The Effect Of Freeze-Thaw Cycles On Dynamic Characteristics Of Silty Sand, Jing Sun, Mao-Sheng Gong, Hong-Qiang Xiong, Lin-Rui Gan
Rock and Soil Mechanics
By using the GDS dynamic triaxial apparatus tests, the effect of freeze-thaw cycles on dynamic stress, dynamic modulus, dynamic modulus ratio and damping ratio of silty sand under different negative temperatures has been investigated in this study. It is found that under the same dynamic strain, the freeze-thaw cycles are negatively correlated with dynamic stress and dynamic modulus, but positively correlated with dynamic modulus ratio and damping ratio. With the increasing of freeze-thaw cyclic numbers, the dynamic stress and dynamic modulus decrease while the dynamic modulus ratio and damping ratio increase. The normalized fitting models for the dynamic modulus ratio …
Experimental And Model Research On Shear Creep Of Granite Under Freeze-Thaw Cycles, Feng-Rui Zhang, An-Nan Jiang, Xiu-Rong Yang, Fa -Yi Shen
Experimental And Model Research On Shear Creep Of Granite Under Freeze-Thaw Cycles, Feng-Rui Zhang, An-Nan Jiang, Xiu-Rong Yang, Fa -Yi Shen
Rock and Soil Mechanics
To study the effect of freeze-thaw on the shear creep characteristics of engineering rocks in cold regions, the granite samples from Huibai tunnel in Jilin province were taken as the research object, and the microscopic characteristics and shear creep tests of samples under different freeze-thaw cycles were carried out. The results show that: 1) With the increase of freeze-thaw cycles, the cracks and voids in the samples develop continuously, and the damage of rock surface becomes more and more obvious. 2) The pores in the sample are mainly composed of small and medium pores, and the porosity increases nonlinearly with …