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本文研究了我国一部分膨胀土地区地温梯度对膨胀土水分迁移的影响和土的胀缩变形幅度与水分交化间的关系。证实在正温条件下,水分在土中的迁移量与温度梯度的大小、历时以及土的初始湿度和密度有关。当压力一定时,土的胀缩变形幅度与水分变化量呈线性关系。提出了土的温度梯度系数δ和胀缩势系数C_(ps)及预估房屋随季节性气候变化产生的升降位移幅度的方法。
In this paper, the effect of geothermal gradients on soil moisture migration in expansive soils and the relationship between soil expansion and contraction and soil moisture are studied. It is confirmed that under the condition of positive temperature, the amount of moisture migration in the soil is related to the size and duration of the temperature gradient and the initial humidity and density of the soil. When the pressure is constant, the expansion and contraction deformation of the soil is linear with the amount of water change. The soil temperature gradient coefficient δ and the expansion and contraction potential coefficient C_(ps) are proposed, and the method of estimating the magnitude of the lift displacement caused by seasonal climate change in the house is proposed.