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中文摘要：
温度影响着黏性土的液塑限、膨胀性和渗透性等水理性质,对于不同的黏性土,这种影响往往差异很大。为了系统地研究这一影响的规律性和机理,以南京地区3种不同矿物组分的黏性土为研究对象,开展了土样在5℃～50℃范围内吸附结合水量、液塑限、膨胀性和渗透性的试验研究。结果表明：温度升高时,黏性土液限减小,膨胀性增加,渗透性增加,这种温度效应根本原因在于吸附结合水量变化。亲水矿物由于其吸附结合水量大,对温度效应起主要作用。亲水矿物含量较多的黏性土,液限随温度变化大,而膨胀率则变化小。亲水矿物含量对渗透性的温度效应影响显著,对比吸附结合水试验：温度升高时,其渗透水由吸附结合水为主转为渗透结合水和自由水为主,渗透系数可上升近十倍。揭示了黏性土3种基本水理性质温度效应的规律性及机理,为相关的地质灾害的评估和预防提供理论基础。
英文摘要：
Temperature has great influence on the hydro-physical properties of clayey soils,such as Atterberg limits,swelling and permeability.This temperature effect may be distinct among different types of soils.In order to systematically study the regularity and mechanism of the effect,this research is conducted to evaluate the adsorbed water content,Atterberg limits,swelling and permeability through laboratory study in the range of 5℃-50℃,among three common types of clayey soils in Nanjing with different mineral compositions.The results indicate that the liquid limit reduces,the swelling increases,the permeability increases with rising temperature,and the temperature effect is fundamentally due to the change of adsorbed water content.Hydrophilic minerals,which contain large amounts of adsorbed water,play an important role in the temperature effect.With the increase of hydrophilic minerals,the temperature effect on the liquid limit increases and the effect on the swelling ratio decreases.The content of the hydrophilic minerals has significant impact on the temperature effect of permeability.The results of adsorbed water content show that the adsorbed water transports to penetrate water and free water when temperature rises,and permeability may increase by tenfold.It indicates the laws and mechanism of the temperature effect on three basic hydro-physical properties of clayey soils,which provides a theoretical basis for assessment and prevention of corresponding geological hazards.
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