岩土施工技术应用于污染场地修复中的问题及研究

随着城市化、工业化进程的加快,我国土壤污染形势十分严峻,在对生态环境造成污染的同时,也极大地威胁到人体健康。因此,对污染土壤的修复十分重要。在该次研究中,设计通过称取一定量的污染土壤样品,添加不同比例的过硫酸钠及水泥,养护后检测其中含有的污染物质量分数,以分析污染场地修复效果。这一过程中,为改善修复效果,还积极地应用高压旋喷和深层搅拌技术。研究发现,污染土地修复中可以将水泥作为氧化药剂过硫酸钠的碱激活剂和热活化剂,以增强过硫酸钠对污染土壤中有机物的氧化性能,提升对各种污染物的降解效果。污染场地原位修复中应用高压旋喷技术与深层搅拌技术可以促进修复药剂与污染物更为高效、快速的混合,在实际土地修复施工过程中,可以选择将所添加水泥的比例控制为大约6%的水平。

With the acceleration of urbanization and industrialization,the situation of soil pollution in China is very serious,which not only causes pollution to the ecological environment,but also poses a great threat to human health.Therefore,the remediation of contaminated soil is very important.In this study,the design weighed a certain amount of contaminated soil samples,added different proportions of sodium persulfate and cement,and tested the mass fraction of pollutants after maintenance,in order to analyze the remediation effect of the contaminated site.In this process,in order to improve the repair effect,high-pressure rotary spraying and deep mixing technology were actively applied.It is found that cement can be used as alkali activator and thermal activator of sodium persulfate in the remediation of contaminated land to enhance the oxidation performance of sodium persulfate on organic matter in contaminated soil and improve the degradation effect of various pollutants.The application of high-pressure rotary jet grouting technology and deep mixing technology in in-situ remediation of contaminated sites can promote the more efficient and rapid mixing of remediation agents and pollutants.In the actual construction process of land restoration,the proportion of cement added can be controlled to about 6%.