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通过模拟高寒地区的自然条件,将采自西藏昌都地区的花岗斑岩进行了30次冻融循环试验,每冻融循环10次,测量试样几何尺寸、重量、波速,并取出部分试样做饱和单轴抗压强度试验和巴西法抗拉强度试验。通过对采集数据的分析、总结,得出结论:冻融循环引起试样质量变化较小,饱水试样纵波随冻融循环次数先减后增,弹性模量、泊松比呈现增大趋势,而试样单轴抗压和抗拉强度降低,但随着冻融次数的增加,降低程度均有所减缓。
By simulating natural conditions in the alpine region, the granite porphyry collected from the Qamdo area in Tibet was subjected to 30 cycles of freeze-thaw cycles with 10 cycles per freeze-thaw cycle to measure the geometric dimensions, weight and wave velocity of the sample and to remove part of the sample Do saturated uniaxial compressive strength test and Brazilian method tensile strength test. Through the analysis and summary of the collected data, it is concluded that the change of sample mass caused by freeze-thaw cycles is small, the longitudinal wave of saturated sample decreases first and then increases with the number of freeze-thaw cycles, and the elastic modulus and Poisson’s ratio increase , While the uniaxial compressive strength and tensile strength of the sample decreased, but with the increase in the number of freeze-thaw cycles, the degree of reduction slowed down.