The treatment of contaminated soil is a crucial issue in geotechnical and environmental engineering. This study proposes to incorporate appropriate polypropylene fibers and cements as an effective method to treat heavy metal contaminated soil (HMCS). The objective of this paper is to investigate the effects of fiber content, fiber length, cement content, curing time, heavy metal types and concentration on the mechanical properties of soils. To this end, a series of direct shear test, unconfined compression strength (UCS) test, dry-wet cycle and freeze-thaw cycle test are performed. The results confirm that the appropriate reinforcement of polypropylene fibers and cement is an effective way to recycle HMCS as substitutable fillers in roadbed, which exhibits benefits in environment and economy development.

污染土壤的处理是岩土和环境工程中的关键问题。这项研究建议将适当的聚丙烯纤维和水泥结合起来，作为处理重金属污染土壤（HMCS）的有效方法。本文的目的是研究纤维含量，纤维长度，水泥含量，固化时间，重金属类型和浓度对土壤力学性能的影响。为此，进行了一系列直接剪切试验，无侧限抗压强度（UCS）试验，干湿循环和冻融循环试验。结果证实，聚丙烯纤维和水泥的适当增强是将HMCS替代为路基中的填料的有效方法，对环境和经济发展具有益处。