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基于室内盐溶和盐胀试验,对板块状盐渍土的盐溶和盐胀特性进行研究。试验结果表明:板块状盐渍土属溶陷性土,随着含盐量的增大,溶陷系数增大;盐胀起胀温度随着硫酸钠含量的增加有较大幅度的提前,且最终盐胀力提高很大;随着硫酸钠含量增大,盐胀剧烈区间越接近硫酸钠析出剧烈区间;一定荷载的存在能够抑制盐渍土的盐胀作用。这说明工程实际中若要充分利用板块状盐渍土,必须注意其环境特点并采取相应的处治技术。
Based on the indoor salt solution and salt expansion test, the salting and salt expansion characteristics of plate-like saline soils were studied. The experimental results show that the plate-like saline soil is a kind of collapsible soil. With the increase of salt content, the coefficient of dissolution increases. The swelling and expansion temperature of salt swelling increases with the increase of sodium sulfate content. The final salt expansion force increased greatly. With the increase of the content of sodium sulfate, the severe salt expansion range was closer to the precipitating interval of sodium sulfate. The existence of certain load could restrain salt expansion of saline soil. This shows that engineering practice to make full use of plate-like saline soil, we must pay attention to its environmental characteristics and take appropriate treatment techniques.