论文部分内容阅读
土体污染问题日趋严重,土体中污染物的环境效应已成为当前的研究热点问题之一,但对土体工程性质的影响关注不足。以黄土为对象,试验研究了阴离子表面活性剂对黄土力学性能的影响。阴离子表面活性剂具有弱化作用,可导致黄土黏聚力的下降、压缩性提高、渗透性降低,但可降低黄土的湿陷性。结合土-水特征曲线和扫描电子显微镜观察,进一步解释了污染物对土体力学性能产生影响的作用机制。在工程实践中,既要防止阴离子表面活性剂对黄土力学特性的劣化,同时又要注重其降低黄土的湿陷性。
The problem of soil pollution is becoming more and more serious. The environmental effect of pollutants in soil has become one of the hot issues in current research. However, the impact on soil engineering is not enough. Loess as an object, the experimental study of the anionic surfactant on the mechanical properties of loess. Anionic surfactants have a weakening effect, which can lead to the decrease of cohesion, compressibility and permeability of loess, but reduce the collapsibility of loess. Combined with soil-water characteristic curve and scanning electron microscope observation, the mechanism of pollutants affecting the mechanical properties of soils is further explained. In engineering practice, it is necessary to prevent anionic surfactants from degrading the mechanical properties of loess while paying attention to reducing the collapsibility of loess.