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通过对仪器改进实施了不同程度增湿对膨胀变形影响方面的试验,结果表明:无荷及有荷膨胀率均与增湿程度有关,呈近似线性正相关关系。对影响膨胀土胀缩变形的起始干密度、起始含水率及上覆压力水平分别作了试验研究及相关性分析,得到了各影响因素单独变化时膨胀率的变化规律及其公式,并给出了各因素综合影响的膨胀土增湿变形的一般性建议公式。
Experiments on the effect of different degrees of humidification on the deformation are carried out. The results show that both the unloaded and the charged ones have an approximately linear positive correlation with the degree of humidification. The initial dry density, the initial moisture content and the overpressure, which affect the expansion and contraction deformation of the expansive soil, were studied and the correlation analysis was made respectively. The variation law and the formula of the expansion coefficient were obtained when the influencing factors were changed separately The general formula of the humidification deformation of expansive soil is given with the comprehensive influence of all factors.