室内重塑污染土样制备方法的研究

Engineering properties of contaminated soil has become one of the hottest environmental geotechnical study problems. The key to determine whether the results of physical tests can reflect the actual situation of polluted soil is how to prepare remoulded contaminated soil samples. This paper introduces three techniques to prepare remoulded contaminated soil samples in laboratory, including artificial mixing-compaction method, compaction-immersion method and consolidation-penetration leaching method. Taking CuCl2 as the contaminant, the advantages and disadvantages of the three methods and their application scope have been analyzed and compared. The results show that the artificial mixing-compaction technique is the most effective of saving time and the most widely applicable method. The compaction-immersion technique is more suitable for those conditions that the contamination concentration has been known. The remoulded contaminated soil samples prepared by the consolidation-penetration leaching technique have the minimum structural differences.Thus, it is most suitable for the study of contaminated soil seepage, as well as problems involving different confining pressures.