潍坊某地区盐渍土的工程特性研究

摘要

通过对潍坊某地区的盐渍土进行室内试验研究,可以得出该地区属于氯盐渍土;盐渍土的物理力学性质受其含盐量的多少影响较大,随着含盐量的增加其液塑限值在减小,洗盐后较洗盐前粗颗粒减少细颗粒增多,土粒比重随土中含盐量的增加而降低;盐渍土溶陷沉降量大于压缩沉降量,在同一荷重下,随着深度的增加溶陷系数逐渐减小,上层土的溶陷系数均大于下层土;该地区盐渍土不考虑盐胀性.%The experimental study of saline soil sampled from a certain area of Weifang shows that the above area belongs to chloride saline soil, the physical and mechanical properties of saline soil are greatly influenced by its salt content, the liquid limit and plastic limit decrease with the increment of salt content. The coarse particles decrease and fine particles increase after salt washing, the soil particle proportion decreases with the increase of salt content. The collapse settlement of saline soil is larger than the compression settlement, and the collapse coefficient decreases gradually with the increase of depth under the same load, the collapse coefficient of the upper soil is larger than that of the subsoil. The salt expansion is not considered in the analysis of local saline soil.