通过室内试验,研究不排水条件下反复升温–降温过程引起的饱和粉质黏土的热力学响应。研究表明,在饱和粉质黏土升温–降温的整个作用过程中,试样的温度变化过程在每一个循环内是一致的,而与围压和温度循环次数无关。在每个循环的温度升高过程中,孔隙水压力不断增大并趋于稳定值,且增长趋势类似。同时,归一化最大孔隙水压力随循环次数的增加而增大。在降温过程中,随着温度循环次数的增加,归一化孔隙水压力下降的速率似乎减慢,而残余孔隙水压力则逐渐增大。此外,随着围压的增大,归一化残余孔隙水压力有减小的趋势。随着温度升高,孔隙水和固体颗粒的热膨胀效应导致试样的体积明显增大,而当温度下降时,试样的体积又不断减小并趋于零。 Through laboratory experiments, the thermodynamic response of saturated silty clay caused by repeated warming-cooling process under undrained condition was studied. The results show that during the whole process of temperature rising and cooling of saturated silty clay, the process of temperature change is consistent in every cycle, but not with the number of confining pressure and temperature cycles. During each cycle of temperature increase, the pore water pressure increases and tends to a steady value, and the growth trend is similar. At the same time, the normalized maximum pore water pressure increases with the increase of cycles. During the cooling process, as the number of temperature cycles increases, the normalized pore water pressure appears to be slowing down, whereas the residual pore water pressure gradually increases. In addition, as the confining pressure increases, the normalized residual pore water pressure tends to decrease. As the temperature increases, the thermal expansion effect of pore water and solid particles leads to a significant increase in the volume of the sample, and as the temperature decreases, the volume of the sample continues to decrease and tends to zero.