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采用自行研制的温度控制固结试验装置对一种饱和粉质黏土的热固结特性进行室内试验。研究表明,在不同的有效固结压力作用下饱和试样的孔隙水压力变化趋势以及固结体应变变化趋势类似。在温度升高过程中,由温度导致的孔隙水压力不断增大,当温度达到设定温度时,试样内的孔隙水压力也达到峰值,而且随着有效固结压力的增大,孔隙水压力峰值似乎略有增大。此外,温度升高后的固结排水量远大于温度再降低后的吸水量,亦即经过升温和降温过程,试样总体产生明显的收缩变形。
The thermoconsolidation characteristics of a kind of saturated silty clay were experimentally tested by a self-developed temperature control consolidation test device. The results show that the trend of pore water pressure and the change of strain of saturated specimens are similar under different effective consolidation pressures. During the process of temperature increase, the pore water pressure caused by the temperature increases continuously. When the temperature reaches the set temperature, the pore water pressure in the sample also reaches the peak value, and as the effective consolidation pressure increases, the pore water The pressure peak seems to increase slightly. In addition, the consolidated displacement after the temperature increase is far greater than the temperature after the water absorption to reduce the volume, that is, after heating and cooling process, the overall sample produced significant shrinkage.