大河村房基遗址可溶盐与含水率的相关性研究

Study on the Correlation Between Soluble Salt and Water Content in the Building Foundation Site of Dahe Village

【目的】通过分析红烧土中可溶盐与含水率的相关性,找出引起大河村遗址房基红烧土表层病害原因。【方法】采用称重法、原子吸收光谱仪、滴定法检测样品的含水率、阳离子、阴离子含量,通过变异系数分析得到房基红烧土不同部位的可溶盐组分及含水率的差异性,通过Pearson相关性分析,得到可溶盐组分与含水率存在的相关性。【结果】研究表明:①红烧土不同位置含水率差异显著,含水率最低值为1.98%,最高值为5.86%,最高值为最低值的2.96倍,变异系数为24.12%;②红烧土不同位置可溶盐含量差异显著,可溶盐各组分的差异性由大到小依次为:Cl->SO_(4)^(2-)>CO_(3)^(2-)>Mg^(2+)>Ca^(2+)>Na^(+)>K^(+);③不同位置样品的含水率与Cl-和K^(+)含量显著相关,大河村遗址红烧土的含水率会随着Cl-和K^(+)含量增加而升高。【结论】房基遗址的高可溶盐含量是引起表层病害的主要因素。

[Purposes]This paper analyzes the correlation between soluble salt and water content in the burnt soil,and finds out the cause of the surface disease of the burnt soil of the house foundation.[Methods]The moisture content,cation and anion content of the sample were measured using weighing method,atomic absorption spectrometer,and titration method.The differences in soluble salt components and moisture content in different parts of the red burnt soil on the building foundation were obtained through coefficient of variation analysis.The correlation between soluble salt components and moisture content was obtained through Pearson correlation analysis.[Findings]Research shows that:①There are significant differences in moisture content in different positions of braised soil,with the lowest moisture content being 1.98%,the highest moisture content being 5.86%,the highest moisture content being 2.96 times the lowest value,and the coefficient of variation being 24.12%;②There is a significant difference in the soluble salt content in different positions of braised soil,and the differences in the components of soluble salt from large to small are as follows:Cl->SO_(4)^(2-)>CO_(3)^(2-)>Mg^(2+)>Ca^(2+)>Na^(+)>K^(+);③The moisture content of samples at different locations is significantly correlated with the Cl-and K^(+)content,and the moisture content of the braised soil at the site will increase with the increase of Cl-and K^(+)content.[Conclusions]The high soluble salt content in the foundation site is the main factor causing surface diseases of the site.